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![Omar Sandoval](/assets/img/avatar_default.png)
When I added the blk-mq debugging information to debugfs, I didn't notice that blktrace also creates a "block" directory in debugfs. Make them use the same dentry, now created in the core block code. Based on a patch from Jens. Signed-off-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@fb.com>
772 lines
18 KiB
C
772 lines
18 KiB
C
/*
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* Copyright (C) 2017 Facebook
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <linux/kernel.h>
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#include <linux/blkdev.h>
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#include <linux/debugfs.h>
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#include <linux/blk-mq.h>
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#include "blk.h"
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#include "blk-mq.h"
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#include "blk-mq-tag.h"
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struct blk_mq_debugfs_attr {
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const char *name;
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umode_t mode;
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const struct file_operations *fops;
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};
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static int blk_mq_debugfs_seq_open(struct inode *inode, struct file *file,
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const struct seq_operations *ops)
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{
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struct seq_file *m;
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int ret;
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ret = seq_open(file, ops);
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if (!ret) {
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m = file->private_data;
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m->private = inode->i_private;
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}
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return ret;
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}
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static int hctx_state_show(struct seq_file *m, void *v)
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{
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struct blk_mq_hw_ctx *hctx = m->private;
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seq_printf(m, "0x%lx\n", hctx->state);
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return 0;
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}
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static int hctx_state_open(struct inode *inode, struct file *file)
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{
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return single_open(file, hctx_state_show, inode->i_private);
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}
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static const struct file_operations hctx_state_fops = {
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.open = hctx_state_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int hctx_flags_show(struct seq_file *m, void *v)
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{
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struct blk_mq_hw_ctx *hctx = m->private;
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seq_printf(m, "0x%lx\n", hctx->flags);
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return 0;
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}
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static int hctx_flags_open(struct inode *inode, struct file *file)
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{
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return single_open(file, hctx_flags_show, inode->i_private);
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}
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static const struct file_operations hctx_flags_fops = {
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.open = hctx_flags_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int blk_mq_debugfs_rq_show(struct seq_file *m, void *v)
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{
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struct request *rq = list_entry_rq(v);
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seq_printf(m, "%p {.cmd_flags=0x%x, .rq_flags=0x%x, .tag=%d, .internal_tag=%d}\n",
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rq, rq->cmd_flags, (__force unsigned int)rq->rq_flags,
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rq->tag, rq->internal_tag);
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return 0;
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}
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static void *hctx_dispatch_start(struct seq_file *m, loff_t *pos)
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__acquires(&hctx->lock)
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{
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struct blk_mq_hw_ctx *hctx = m->private;
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spin_lock(&hctx->lock);
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return seq_list_start(&hctx->dispatch, *pos);
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}
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static void *hctx_dispatch_next(struct seq_file *m, void *v, loff_t *pos)
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{
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struct blk_mq_hw_ctx *hctx = m->private;
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return seq_list_next(v, &hctx->dispatch, pos);
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}
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static void hctx_dispatch_stop(struct seq_file *m, void *v)
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__releases(&hctx->lock)
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{
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struct blk_mq_hw_ctx *hctx = m->private;
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spin_unlock(&hctx->lock);
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}
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static const struct seq_operations hctx_dispatch_seq_ops = {
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.start = hctx_dispatch_start,
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.next = hctx_dispatch_next,
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.stop = hctx_dispatch_stop,
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.show = blk_mq_debugfs_rq_show,
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};
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static int hctx_dispatch_open(struct inode *inode, struct file *file)
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{
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return blk_mq_debugfs_seq_open(inode, file, &hctx_dispatch_seq_ops);
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}
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static const struct file_operations hctx_dispatch_fops = {
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.open = hctx_dispatch_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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static int hctx_ctx_map_show(struct seq_file *m, void *v)
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{
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struct blk_mq_hw_ctx *hctx = m->private;
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sbitmap_bitmap_show(&hctx->ctx_map, m);
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return 0;
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}
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static int hctx_ctx_map_open(struct inode *inode, struct file *file)
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{
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return single_open(file, hctx_ctx_map_show, inode->i_private);
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}
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static const struct file_operations hctx_ctx_map_fops = {
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.open = hctx_ctx_map_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static void blk_mq_debugfs_tags_show(struct seq_file *m,
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struct blk_mq_tags *tags)
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{
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seq_printf(m, "nr_tags=%u\n", tags->nr_tags);
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seq_printf(m, "nr_reserved_tags=%u\n", tags->nr_reserved_tags);
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seq_printf(m, "active_queues=%d\n",
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atomic_read(&tags->active_queues));
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seq_puts(m, "\nbitmap_tags:\n");
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sbitmap_queue_show(&tags->bitmap_tags, m);
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if (tags->nr_reserved_tags) {
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seq_puts(m, "\nbreserved_tags:\n");
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sbitmap_queue_show(&tags->breserved_tags, m);
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}
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}
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static int hctx_tags_show(struct seq_file *m, void *v)
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{
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struct blk_mq_hw_ctx *hctx = m->private;
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struct request_queue *q = hctx->queue;
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int res;
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res = mutex_lock_interruptible(&q->sysfs_lock);
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if (res)
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goto out;
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if (hctx->tags)
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blk_mq_debugfs_tags_show(m, hctx->tags);
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mutex_unlock(&q->sysfs_lock);
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out:
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return res;
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}
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static int hctx_tags_open(struct inode *inode, struct file *file)
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{
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return single_open(file, hctx_tags_show, inode->i_private);
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}
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static const struct file_operations hctx_tags_fops = {
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.open = hctx_tags_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int hctx_tags_bitmap_show(struct seq_file *m, void *v)
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{
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struct blk_mq_hw_ctx *hctx = m->private;
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struct request_queue *q = hctx->queue;
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int res;
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res = mutex_lock_interruptible(&q->sysfs_lock);
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if (res)
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goto out;
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if (hctx->tags)
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sbitmap_bitmap_show(&hctx->tags->bitmap_tags.sb, m);
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mutex_unlock(&q->sysfs_lock);
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out:
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return res;
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}
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static int hctx_tags_bitmap_open(struct inode *inode, struct file *file)
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{
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return single_open(file, hctx_tags_bitmap_show, inode->i_private);
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}
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static const struct file_operations hctx_tags_bitmap_fops = {
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.open = hctx_tags_bitmap_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int hctx_sched_tags_show(struct seq_file *m, void *v)
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{
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struct blk_mq_hw_ctx *hctx = m->private;
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struct request_queue *q = hctx->queue;
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int res;
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res = mutex_lock_interruptible(&q->sysfs_lock);
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if (res)
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goto out;
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if (hctx->sched_tags)
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blk_mq_debugfs_tags_show(m, hctx->sched_tags);
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mutex_unlock(&q->sysfs_lock);
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out:
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return res;
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}
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static int hctx_sched_tags_open(struct inode *inode, struct file *file)
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{
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return single_open(file, hctx_sched_tags_show, inode->i_private);
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}
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static const struct file_operations hctx_sched_tags_fops = {
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.open = hctx_sched_tags_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int hctx_sched_tags_bitmap_show(struct seq_file *m, void *v)
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{
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struct blk_mq_hw_ctx *hctx = m->private;
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struct request_queue *q = hctx->queue;
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int res;
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res = mutex_lock_interruptible(&q->sysfs_lock);
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if (res)
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goto out;
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if (hctx->sched_tags)
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sbitmap_bitmap_show(&hctx->sched_tags->bitmap_tags.sb, m);
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mutex_unlock(&q->sysfs_lock);
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out:
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return res;
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}
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static int hctx_sched_tags_bitmap_open(struct inode *inode, struct file *file)
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{
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return single_open(file, hctx_sched_tags_bitmap_show, inode->i_private);
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}
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static const struct file_operations hctx_sched_tags_bitmap_fops = {
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.open = hctx_sched_tags_bitmap_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int hctx_io_poll_show(struct seq_file *m, void *v)
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{
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struct blk_mq_hw_ctx *hctx = m->private;
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seq_printf(m, "considered=%lu\n", hctx->poll_considered);
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seq_printf(m, "invoked=%lu\n", hctx->poll_invoked);
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seq_printf(m, "success=%lu\n", hctx->poll_success);
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return 0;
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}
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static int hctx_io_poll_open(struct inode *inode, struct file *file)
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{
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return single_open(file, hctx_io_poll_show, inode->i_private);
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}
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static ssize_t hctx_io_poll_write(struct file *file, const char __user *buf,
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size_t count, loff_t *ppos)
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{
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struct seq_file *m = file->private_data;
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struct blk_mq_hw_ctx *hctx = m->private;
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hctx->poll_considered = hctx->poll_invoked = hctx->poll_success = 0;
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return count;
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}
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static const struct file_operations hctx_io_poll_fops = {
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.open = hctx_io_poll_open,
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.read = seq_read,
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.write = hctx_io_poll_write,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static void print_stat(struct seq_file *m, struct blk_rq_stat *stat)
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{
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seq_printf(m, "samples=%d, mean=%lld, min=%llu, max=%llu",
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stat->nr_samples, stat->mean, stat->min, stat->max);
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}
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static int hctx_stats_show(struct seq_file *m, void *v)
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{
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struct blk_mq_hw_ctx *hctx = m->private;
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struct blk_rq_stat stat[2];
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blk_stat_init(&stat[BLK_STAT_READ]);
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blk_stat_init(&stat[BLK_STAT_WRITE]);
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blk_hctx_stat_get(hctx, stat);
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seq_puts(m, "read: ");
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print_stat(m, &stat[BLK_STAT_READ]);
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seq_puts(m, "\n");
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seq_puts(m, "write: ");
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print_stat(m, &stat[BLK_STAT_WRITE]);
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seq_puts(m, "\n");
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return 0;
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}
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static int hctx_stats_open(struct inode *inode, struct file *file)
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{
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return single_open(file, hctx_stats_show, inode->i_private);
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}
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static ssize_t hctx_stats_write(struct file *file, const char __user *buf,
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size_t count, loff_t *ppos)
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{
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struct seq_file *m = file->private_data;
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struct blk_mq_hw_ctx *hctx = m->private;
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struct blk_mq_ctx *ctx;
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int i;
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hctx_for_each_ctx(hctx, ctx, i) {
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blk_stat_init(&ctx->stat[BLK_STAT_READ]);
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blk_stat_init(&ctx->stat[BLK_STAT_WRITE]);
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}
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return count;
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}
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static const struct file_operations hctx_stats_fops = {
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.open = hctx_stats_open,
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.read = seq_read,
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.write = hctx_stats_write,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int hctx_dispatched_show(struct seq_file *m, void *v)
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{
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struct blk_mq_hw_ctx *hctx = m->private;
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int i;
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seq_printf(m, "%8u\t%lu\n", 0U, hctx->dispatched[0]);
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for (i = 1; i < BLK_MQ_MAX_DISPATCH_ORDER - 1; i++) {
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unsigned int d = 1U << (i - 1);
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seq_printf(m, "%8u\t%lu\n", d, hctx->dispatched[i]);
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}
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seq_printf(m, "%8u+\t%lu\n", 1U << (i - 1), hctx->dispatched[i]);
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return 0;
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}
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static int hctx_dispatched_open(struct inode *inode, struct file *file)
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{
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return single_open(file, hctx_dispatched_show, inode->i_private);
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}
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static ssize_t hctx_dispatched_write(struct file *file, const char __user *buf,
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size_t count, loff_t *ppos)
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{
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struct seq_file *m = file->private_data;
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struct blk_mq_hw_ctx *hctx = m->private;
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int i;
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for (i = 0; i < BLK_MQ_MAX_DISPATCH_ORDER; i++)
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hctx->dispatched[i] = 0;
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return count;
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}
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static const struct file_operations hctx_dispatched_fops = {
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.open = hctx_dispatched_open,
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.read = seq_read,
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.write = hctx_dispatched_write,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int hctx_queued_show(struct seq_file *m, void *v)
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{
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struct blk_mq_hw_ctx *hctx = m->private;
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seq_printf(m, "%lu\n", hctx->queued);
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return 0;
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}
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static int hctx_queued_open(struct inode *inode, struct file *file)
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{
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return single_open(file, hctx_queued_show, inode->i_private);
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}
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static ssize_t hctx_queued_write(struct file *file, const char __user *buf,
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size_t count, loff_t *ppos)
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{
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struct seq_file *m = file->private_data;
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struct blk_mq_hw_ctx *hctx = m->private;
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hctx->queued = 0;
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return count;
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}
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static const struct file_operations hctx_queued_fops = {
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.open = hctx_queued_open,
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.read = seq_read,
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.write = hctx_queued_write,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int hctx_run_show(struct seq_file *m, void *v)
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{
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struct blk_mq_hw_ctx *hctx = m->private;
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seq_printf(m, "%lu\n", hctx->run);
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return 0;
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}
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static int hctx_run_open(struct inode *inode, struct file *file)
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{
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return single_open(file, hctx_run_show, inode->i_private);
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}
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static ssize_t hctx_run_write(struct file *file, const char __user *buf,
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size_t count, loff_t *ppos)
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{
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struct seq_file *m = file->private_data;
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struct blk_mq_hw_ctx *hctx = m->private;
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hctx->run = 0;
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return count;
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}
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static const struct file_operations hctx_run_fops = {
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.open = hctx_run_open,
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.read = seq_read,
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.write = hctx_run_write,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int hctx_active_show(struct seq_file *m, void *v)
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{
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struct blk_mq_hw_ctx *hctx = m->private;
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seq_printf(m, "%d\n", atomic_read(&hctx->nr_active));
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return 0;
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}
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static int hctx_active_open(struct inode *inode, struct file *file)
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{
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return single_open(file, hctx_active_show, inode->i_private);
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}
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static const struct file_operations hctx_active_fops = {
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.open = hctx_active_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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|
|
static void *ctx_rq_list_start(struct seq_file *m, loff_t *pos)
|
|
__acquires(&ctx->lock)
|
|
{
|
|
struct blk_mq_ctx *ctx = m->private;
|
|
|
|
spin_lock(&ctx->lock);
|
|
return seq_list_start(&ctx->rq_list, *pos);
|
|
}
|
|
|
|
static void *ctx_rq_list_next(struct seq_file *m, void *v, loff_t *pos)
|
|
{
|
|
struct blk_mq_ctx *ctx = m->private;
|
|
|
|
return seq_list_next(v, &ctx->rq_list, pos);
|
|
}
|
|
|
|
static void ctx_rq_list_stop(struct seq_file *m, void *v)
|
|
__releases(&ctx->lock)
|
|
{
|
|
struct blk_mq_ctx *ctx = m->private;
|
|
|
|
spin_unlock(&ctx->lock);
|
|
}
|
|
|
|
static const struct seq_operations ctx_rq_list_seq_ops = {
|
|
.start = ctx_rq_list_start,
|
|
.next = ctx_rq_list_next,
|
|
.stop = ctx_rq_list_stop,
|
|
.show = blk_mq_debugfs_rq_show,
|
|
};
|
|
|
|
static int ctx_rq_list_open(struct inode *inode, struct file *file)
|
|
{
|
|
return blk_mq_debugfs_seq_open(inode, file, &ctx_rq_list_seq_ops);
|
|
}
|
|
|
|
static const struct file_operations ctx_rq_list_fops = {
|
|
.open = ctx_rq_list_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release,
|
|
};
|
|
|
|
static int ctx_dispatched_show(struct seq_file *m, void *v)
|
|
{
|
|
struct blk_mq_ctx *ctx = m->private;
|
|
|
|
seq_printf(m, "%lu %lu\n", ctx->rq_dispatched[1], ctx->rq_dispatched[0]);
|
|
return 0;
|
|
}
|
|
|
|
static int ctx_dispatched_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, ctx_dispatched_show, inode->i_private);
|
|
}
|
|
|
|
static ssize_t ctx_dispatched_write(struct file *file, const char __user *buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct seq_file *m = file->private_data;
|
|
struct blk_mq_ctx *ctx = m->private;
|
|
|
|
ctx->rq_dispatched[0] = ctx->rq_dispatched[1] = 0;
|
|
return count;
|
|
}
|
|
|
|
static const struct file_operations ctx_dispatched_fops = {
|
|
.open = ctx_dispatched_open,
|
|
.read = seq_read,
|
|
.write = ctx_dispatched_write,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static int ctx_merged_show(struct seq_file *m, void *v)
|
|
{
|
|
struct blk_mq_ctx *ctx = m->private;
|
|
|
|
seq_printf(m, "%lu\n", ctx->rq_merged);
|
|
return 0;
|
|
}
|
|
|
|
static int ctx_merged_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, ctx_merged_show, inode->i_private);
|
|
}
|
|
|
|
static ssize_t ctx_merged_write(struct file *file, const char __user *buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct seq_file *m = file->private_data;
|
|
struct blk_mq_ctx *ctx = m->private;
|
|
|
|
ctx->rq_merged = 0;
|
|
return count;
|
|
}
|
|
|
|
static const struct file_operations ctx_merged_fops = {
|
|
.open = ctx_merged_open,
|
|
.read = seq_read,
|
|
.write = ctx_merged_write,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static int ctx_completed_show(struct seq_file *m, void *v)
|
|
{
|
|
struct blk_mq_ctx *ctx = m->private;
|
|
|
|
seq_printf(m, "%lu %lu\n", ctx->rq_completed[1], ctx->rq_completed[0]);
|
|
return 0;
|
|
}
|
|
|
|
static int ctx_completed_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, ctx_completed_show, inode->i_private);
|
|
}
|
|
|
|
static ssize_t ctx_completed_write(struct file *file, const char __user *buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct seq_file *m = file->private_data;
|
|
struct blk_mq_ctx *ctx = m->private;
|
|
|
|
ctx->rq_completed[0] = ctx->rq_completed[1] = 0;
|
|
return count;
|
|
}
|
|
|
|
static const struct file_operations ctx_completed_fops = {
|
|
.open = ctx_completed_open,
|
|
.read = seq_read,
|
|
.write = ctx_completed_write,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static const struct blk_mq_debugfs_attr blk_mq_debugfs_hctx_attrs[] = {
|
|
{"state", 0400, &hctx_state_fops},
|
|
{"flags", 0400, &hctx_flags_fops},
|
|
{"dispatch", 0400, &hctx_dispatch_fops},
|
|
{"ctx_map", 0400, &hctx_ctx_map_fops},
|
|
{"tags", 0400, &hctx_tags_fops},
|
|
{"tags_bitmap", 0400, &hctx_tags_bitmap_fops},
|
|
{"sched_tags", 0400, &hctx_sched_tags_fops},
|
|
{"sched_tags_bitmap", 0400, &hctx_sched_tags_bitmap_fops},
|
|
{"io_poll", 0600, &hctx_io_poll_fops},
|
|
{"stats", 0600, &hctx_stats_fops},
|
|
{"dispatched", 0600, &hctx_dispatched_fops},
|
|
{"queued", 0600, &hctx_queued_fops},
|
|
{"run", 0600, &hctx_run_fops},
|
|
{"active", 0400, &hctx_active_fops},
|
|
{},
|
|
};
|
|
|
|
static const struct blk_mq_debugfs_attr blk_mq_debugfs_ctx_attrs[] = {
|
|
{"rq_list", 0400, &ctx_rq_list_fops},
|
|
{"dispatched", 0600, &ctx_dispatched_fops},
|
|
{"merged", 0600, &ctx_merged_fops},
|
|
{"completed", 0600, &ctx_completed_fops},
|
|
{},
|
|
};
|
|
|
|
int blk_mq_debugfs_register(struct request_queue *q, const char *name)
|
|
{
|
|
if (!blk_debugfs_root)
|
|
return -ENOENT;
|
|
|
|
q->debugfs_dir = debugfs_create_dir(name, blk_debugfs_root);
|
|
if (!q->debugfs_dir)
|
|
goto err;
|
|
|
|
if (blk_mq_debugfs_register_hctxs(q))
|
|
goto err;
|
|
|
|
return 0;
|
|
|
|
err:
|
|
blk_mq_debugfs_unregister(q);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
void blk_mq_debugfs_unregister(struct request_queue *q)
|
|
{
|
|
debugfs_remove_recursive(q->debugfs_dir);
|
|
q->mq_debugfs_dir = NULL;
|
|
q->debugfs_dir = NULL;
|
|
}
|
|
|
|
static bool debugfs_create_files(struct dentry *parent, void *data,
|
|
const struct blk_mq_debugfs_attr *attr)
|
|
{
|
|
for (; attr->name; attr++) {
|
|
if (!debugfs_create_file(attr->name, attr->mode, parent,
|
|
data, attr->fops))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static int blk_mq_debugfs_register_ctx(struct request_queue *q,
|
|
struct blk_mq_ctx *ctx,
|
|
struct dentry *hctx_dir)
|
|
{
|
|
struct dentry *ctx_dir;
|
|
char name[20];
|
|
|
|
snprintf(name, sizeof(name), "cpu%u", ctx->cpu);
|
|
ctx_dir = debugfs_create_dir(name, hctx_dir);
|
|
if (!ctx_dir)
|
|
return -ENOMEM;
|
|
|
|
if (!debugfs_create_files(ctx_dir, ctx, blk_mq_debugfs_ctx_attrs))
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int blk_mq_debugfs_register_hctx(struct request_queue *q,
|
|
struct blk_mq_hw_ctx *hctx)
|
|
{
|
|
struct blk_mq_ctx *ctx;
|
|
struct dentry *hctx_dir;
|
|
char name[20];
|
|
int i;
|
|
|
|
snprintf(name, sizeof(name), "%u", hctx->queue_num);
|
|
hctx_dir = debugfs_create_dir(name, q->mq_debugfs_dir);
|
|
if (!hctx_dir)
|
|
return -ENOMEM;
|
|
|
|
if (!debugfs_create_files(hctx_dir, hctx, blk_mq_debugfs_hctx_attrs))
|
|
return -ENOMEM;
|
|
|
|
hctx_for_each_ctx(hctx, ctx, i) {
|
|
if (blk_mq_debugfs_register_ctx(q, ctx, hctx_dir))
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int blk_mq_debugfs_register_hctxs(struct request_queue *q)
|
|
{
|
|
struct blk_mq_hw_ctx *hctx;
|
|
int i;
|
|
|
|
if (!q->debugfs_dir)
|
|
return -ENOENT;
|
|
|
|
q->mq_debugfs_dir = debugfs_create_dir("mq", q->debugfs_dir);
|
|
if (!q->mq_debugfs_dir)
|
|
goto err;
|
|
|
|
queue_for_each_hw_ctx(q, hctx, i) {
|
|
if (blk_mq_debugfs_register_hctx(q, hctx))
|
|
goto err;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err:
|
|
blk_mq_debugfs_unregister_hctxs(q);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
void blk_mq_debugfs_unregister_hctxs(struct request_queue *q)
|
|
{
|
|
debugfs_remove_recursive(q->mq_debugfs_dir);
|
|
q->mq_debugfs_dir = NULL;
|
|
}
|