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92b2e5b31d
Stop reusing dquots from the freelist when allocating new ones directly, and
implement a shrinker that actually follows the specifications for the
interface. The shrinker implementation is still highly suboptimal at this
point, but we can gradually work on it.
This also fixes an bug in the previous lock ordering, where we would take
the hash and dqlist locks inside of the freelist lock against the normal
lock ordering. This is only solvable by introducing the dispose list,
and thus not when using direct reclaim of unused dquots for new allocations.
As a side-effect the quota upper bound and used to free ratio values in
/proc/fs/xfs/xqm are set to 0 as these values don't make any sense in the
new world order.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ben Myers <bpm@sgi.com>
(cherry picked from commit 04da0c8196)
105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
/*
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* Copyright (c) 2000-2003 Silicon Graphics, Inc.
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* All Rights Reserved.
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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 License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would 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
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* GNU 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, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_bit.h"
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#include "xfs_log.h"
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#include "xfs_inum.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_alloc.h"
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#include "xfs_quota.h"
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#include "xfs_mount.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_inode.h"
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#include "xfs_itable.h"
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#include "xfs_bmap.h"
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#include "xfs_rtalloc.h"
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#include "xfs_error.h"
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#include "xfs_attr.h"
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#include "xfs_buf_item.h"
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#include "xfs_qm.h"
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struct xqmstats xqmstats;
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static int xqm_proc_show(struct seq_file *m, void *v)
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{
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/* maximum; incore; ratio free to inuse; freelist */
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seq_printf(m, "%d\t%d\t%d\t%u\n",
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0,
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xfs_Gqm? atomic_read(&xfs_Gqm->qm_totaldquots) : 0,
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0,
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xfs_Gqm? xfs_Gqm->qm_dqfrlist_cnt : 0);
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return 0;
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}
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static int xqm_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, xqm_proc_show, NULL);
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}
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static const struct file_operations xqm_proc_fops = {
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.owner = THIS_MODULE,
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.open = xqm_proc_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 xqmstat_proc_show(struct seq_file *m, void *v)
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{
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/* quota performance statistics */
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seq_printf(m, "qm %u %u %u %u %u %u %u %u\n",
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xqmstats.xs_qm_dqreclaims,
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xqmstats.xs_qm_dqreclaim_misses,
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xqmstats.xs_qm_dquot_dups,
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xqmstats.xs_qm_dqcachemisses,
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xqmstats.xs_qm_dqcachehits,
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xqmstats.xs_qm_dqwants,
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xqmstats.xs_qm_dqshake_reclaims,
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xqmstats.xs_qm_dqinact_reclaims);
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return 0;
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}
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static int xqmstat_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, xqmstat_proc_show, NULL);
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}
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static const struct file_operations xqmstat_proc_fops = {
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.owner = THIS_MODULE,
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.open = xqmstat_proc_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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void
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xfs_qm_init_procfs(void)
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{
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proc_create("fs/xfs/xqmstat", 0, NULL, &xqmstat_proc_fops);
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proc_create("fs/xfs/xqm", 0, NULL, &xqm_proc_fops);
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}
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void
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xfs_qm_cleanup_procfs(void)
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{
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remove_proc_entry("fs/xfs/xqm", NULL);
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remove_proc_entry("fs/xfs/xqmstat", NULL);
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}
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