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![David Chinner](/assets/img/avatar_default.png)
One of the perpetual scaling problems XFS has is indexing it's incore inodes. We currently uses hashes and the default hash sizes chosen can only ever be a tradeoff between memory consumption and the maximum realistic size of the cache. As a result, anyone who has millions of inodes cached on a filesystem needs to tunes the size of the cache via the ihashsize mount option to allow decent scalability with inode cache operations. A further problem is the separate inode cluster hash, whose size is based on the ihashsize but is smaller, and so under certain conditions (sparse cluster cache population) this can become a limitation long before the inode hash is causing issues. The following patchset removes the inode hash and cluster hash and replaces them with radix trees to avoid the scalability limitations of the hashes. It also reduces the size of the inodes by 3 pointers.... SGI-PV: 969561 SGI-Modid: xfs-linux-melb:xfs-kern:29481a Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Tim Shimmin <tes@sgi.com>
578 lines
16 KiB
C
578 lines
16 KiB
C
/*
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* Copyright (c) 2000-2001,2005 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_types.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_buf_item.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_dmapi.h"
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#include "xfs_mount.h"
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#include "xfs_trans_priv.h"
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#include "xfs_extfree_item.h"
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kmem_zone_t *xfs_efi_zone;
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kmem_zone_t *xfs_efd_zone;
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STATIC void xfs_efi_item_unlock(xfs_efi_log_item_t *);
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void
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xfs_efi_item_free(xfs_efi_log_item_t *efip)
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{
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int nexts = efip->efi_format.efi_nextents;
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if (nexts > XFS_EFI_MAX_FAST_EXTENTS) {
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kmem_free(efip, sizeof(xfs_efi_log_item_t) +
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(nexts - 1) * sizeof(xfs_extent_t));
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} else {
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kmem_zone_free(xfs_efi_zone, efip);
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}
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}
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/*
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* This returns the number of iovecs needed to log the given efi item.
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* We only need 1 iovec for an efi item. It just logs the efi_log_format
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* structure.
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*/
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/*ARGSUSED*/
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STATIC uint
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xfs_efi_item_size(xfs_efi_log_item_t *efip)
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{
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return 1;
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}
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/*
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* This is called to fill in the vector of log iovecs for the
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* given efi log item. We use only 1 iovec, and we point that
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* at the efi_log_format structure embedded in the efi item.
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* It is at this point that we assert that all of the extent
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* slots in the efi item have been filled.
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*/
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STATIC void
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xfs_efi_item_format(xfs_efi_log_item_t *efip,
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xfs_log_iovec_t *log_vector)
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{
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uint size;
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ASSERT(efip->efi_next_extent == efip->efi_format.efi_nextents);
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efip->efi_format.efi_type = XFS_LI_EFI;
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size = sizeof(xfs_efi_log_format_t);
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size += (efip->efi_format.efi_nextents - 1) * sizeof(xfs_extent_t);
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efip->efi_format.efi_size = 1;
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log_vector->i_addr = (xfs_caddr_t)&(efip->efi_format);
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log_vector->i_len = size;
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XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_EFI_FORMAT);
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ASSERT(size >= sizeof(xfs_efi_log_format_t));
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}
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/*
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* Pinning has no meaning for an efi item, so just return.
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*/
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/*ARGSUSED*/
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STATIC void
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xfs_efi_item_pin(xfs_efi_log_item_t *efip)
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{
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return;
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}
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/*
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* While EFIs cannot really be pinned, the unpin operation is the
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* last place at which the EFI is manipulated during a transaction.
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* Here we coordinate with xfs_efi_cancel() to determine who gets to
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* free the EFI.
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*/
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/*ARGSUSED*/
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STATIC void
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xfs_efi_item_unpin(xfs_efi_log_item_t *efip, int stale)
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{
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xfs_mount_t *mp;
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SPLDECL(s);
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mp = efip->efi_item.li_mountp;
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AIL_LOCK(mp, s);
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if (efip->efi_flags & XFS_EFI_CANCELED) {
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/*
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* xfs_trans_delete_ail() drops the AIL lock.
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*/
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xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s);
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xfs_efi_item_free(efip);
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} else {
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efip->efi_flags |= XFS_EFI_COMMITTED;
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AIL_UNLOCK(mp, s);
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}
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}
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/*
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* like unpin only we have to also clear the xaction descriptor
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* pointing the log item if we free the item. This routine duplicates
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* unpin because efi_flags is protected by the AIL lock. Freeing
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* the descriptor and then calling unpin would force us to drop the AIL
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* lock which would open up a race condition.
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*/
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STATIC void
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xfs_efi_item_unpin_remove(xfs_efi_log_item_t *efip, xfs_trans_t *tp)
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{
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xfs_mount_t *mp;
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xfs_log_item_desc_t *lidp;
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SPLDECL(s);
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mp = efip->efi_item.li_mountp;
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AIL_LOCK(mp, s);
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if (efip->efi_flags & XFS_EFI_CANCELED) {
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/*
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* free the xaction descriptor pointing to this item
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*/
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lidp = xfs_trans_find_item(tp, (xfs_log_item_t *) efip);
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xfs_trans_free_item(tp, lidp);
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/*
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* pull the item off the AIL.
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* xfs_trans_delete_ail() drops the AIL lock.
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*/
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xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s);
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xfs_efi_item_free(efip);
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} else {
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efip->efi_flags |= XFS_EFI_COMMITTED;
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AIL_UNLOCK(mp, s);
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}
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}
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/*
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* Efi items have no locking or pushing. However, since EFIs are
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* pulled from the AIL when their corresponding EFDs are committed
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* to disk, their situation is very similar to being pinned. Return
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* XFS_ITEM_PINNED so that the caller will eventually flush the log.
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* This should help in getting the EFI out of the AIL.
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*/
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/*ARGSUSED*/
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STATIC uint
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xfs_efi_item_trylock(xfs_efi_log_item_t *efip)
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{
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return XFS_ITEM_PINNED;
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}
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/*
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* Efi items have no locking, so just return.
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*/
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/*ARGSUSED*/
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STATIC void
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xfs_efi_item_unlock(xfs_efi_log_item_t *efip)
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{
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if (efip->efi_item.li_flags & XFS_LI_ABORTED)
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xfs_efi_item_free(efip);
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return;
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}
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/*
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* The EFI is logged only once and cannot be moved in the log, so
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* simply return the lsn at which it's been logged. The canceled
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* flag is not paid any attention here. Checking for that is delayed
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* until the EFI is unpinned.
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*/
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/*ARGSUSED*/
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STATIC xfs_lsn_t
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xfs_efi_item_committed(xfs_efi_log_item_t *efip, xfs_lsn_t lsn)
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{
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return lsn;
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}
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/*
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* There isn't much you can do to push on an efi item. It is simply
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* stuck waiting for all of its corresponding efd items to be
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* committed to disk.
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*/
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/*ARGSUSED*/
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STATIC void
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xfs_efi_item_push(xfs_efi_log_item_t *efip)
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{
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return;
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}
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/*
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* The EFI dependency tracking op doesn't do squat. It can't because
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* it doesn't know where the free extent is coming from. The dependency
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* tracking has to be handled by the "enclosing" metadata object. For
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* example, for inodes, the inode is locked throughout the extent freeing
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* so the dependency should be recorded there.
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*/
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/*ARGSUSED*/
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STATIC void
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xfs_efi_item_committing(xfs_efi_log_item_t *efip, xfs_lsn_t lsn)
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{
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return;
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}
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/*
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* This is the ops vector shared by all efi log items.
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*/
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static struct xfs_item_ops xfs_efi_item_ops = {
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.iop_size = (uint(*)(xfs_log_item_t*))xfs_efi_item_size,
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.iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
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xfs_efi_item_format,
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.iop_pin = (void(*)(xfs_log_item_t*))xfs_efi_item_pin,
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.iop_unpin = (void(*)(xfs_log_item_t*, int))xfs_efi_item_unpin,
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.iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t *))
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xfs_efi_item_unpin_remove,
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.iop_trylock = (uint(*)(xfs_log_item_t*))xfs_efi_item_trylock,
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.iop_unlock = (void(*)(xfs_log_item_t*))xfs_efi_item_unlock,
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.iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
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xfs_efi_item_committed,
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.iop_push = (void(*)(xfs_log_item_t*))xfs_efi_item_push,
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.iop_pushbuf = NULL,
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.iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
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xfs_efi_item_committing
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};
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/*
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* Allocate and initialize an efi item with the given number of extents.
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*/
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xfs_efi_log_item_t *
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xfs_efi_init(xfs_mount_t *mp,
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uint nextents)
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{
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xfs_efi_log_item_t *efip;
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uint size;
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ASSERT(nextents > 0);
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if (nextents > XFS_EFI_MAX_FAST_EXTENTS) {
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size = (uint)(sizeof(xfs_efi_log_item_t) +
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((nextents - 1) * sizeof(xfs_extent_t)));
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efip = (xfs_efi_log_item_t*)kmem_zalloc(size, KM_SLEEP);
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} else {
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efip = (xfs_efi_log_item_t*)kmem_zone_zalloc(xfs_efi_zone,
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KM_SLEEP);
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}
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efip->efi_item.li_type = XFS_LI_EFI;
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efip->efi_item.li_ops = &xfs_efi_item_ops;
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efip->efi_item.li_mountp = mp;
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efip->efi_format.efi_nextents = nextents;
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efip->efi_format.efi_id = (__psint_t)(void*)efip;
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return (efip);
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}
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/*
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* Copy an EFI format buffer from the given buf, and into the destination
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* EFI format structure.
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* The given buffer can be in 32 bit or 64 bit form (which has different padding),
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* one of which will be the native format for this kernel.
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* It will handle the conversion of formats if necessary.
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*/
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int
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xfs_efi_copy_format(xfs_log_iovec_t *buf, xfs_efi_log_format_t *dst_efi_fmt)
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{
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xfs_efi_log_format_t *src_efi_fmt = (xfs_efi_log_format_t *)buf->i_addr;
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uint i;
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uint len = sizeof(xfs_efi_log_format_t) +
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(src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_t);
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uint len32 = sizeof(xfs_efi_log_format_32_t) +
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(src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_32_t);
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uint len64 = sizeof(xfs_efi_log_format_64_t) +
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(src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_64_t);
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if (buf->i_len == len) {
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memcpy((char *)dst_efi_fmt, (char*)src_efi_fmt, len);
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return 0;
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} else if (buf->i_len == len32) {
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xfs_efi_log_format_32_t *src_efi_fmt_32 =
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(xfs_efi_log_format_32_t *)buf->i_addr;
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dst_efi_fmt->efi_type = src_efi_fmt_32->efi_type;
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dst_efi_fmt->efi_size = src_efi_fmt_32->efi_size;
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dst_efi_fmt->efi_nextents = src_efi_fmt_32->efi_nextents;
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dst_efi_fmt->efi_id = src_efi_fmt_32->efi_id;
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for (i = 0; i < dst_efi_fmt->efi_nextents; i++) {
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dst_efi_fmt->efi_extents[i].ext_start =
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src_efi_fmt_32->efi_extents[i].ext_start;
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dst_efi_fmt->efi_extents[i].ext_len =
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src_efi_fmt_32->efi_extents[i].ext_len;
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}
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return 0;
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} else if (buf->i_len == len64) {
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xfs_efi_log_format_64_t *src_efi_fmt_64 =
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(xfs_efi_log_format_64_t *)buf->i_addr;
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dst_efi_fmt->efi_type = src_efi_fmt_64->efi_type;
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dst_efi_fmt->efi_size = src_efi_fmt_64->efi_size;
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dst_efi_fmt->efi_nextents = src_efi_fmt_64->efi_nextents;
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dst_efi_fmt->efi_id = src_efi_fmt_64->efi_id;
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for (i = 0; i < dst_efi_fmt->efi_nextents; i++) {
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dst_efi_fmt->efi_extents[i].ext_start =
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src_efi_fmt_64->efi_extents[i].ext_start;
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dst_efi_fmt->efi_extents[i].ext_len =
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src_efi_fmt_64->efi_extents[i].ext_len;
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}
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return 0;
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}
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return EFSCORRUPTED;
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}
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/*
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* This is called by the efd item code below to release references to
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* the given efi item. Each efd calls this with the number of
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* extents that it has logged, and when the sum of these reaches
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* the total number of extents logged by this efi item we can free
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* the efi item.
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*
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* Freeing the efi item requires that we remove it from the AIL.
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* We'll use the AIL lock to protect our counters as well as
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* the removal from the AIL.
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*/
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void
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xfs_efi_release(xfs_efi_log_item_t *efip,
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uint nextents)
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{
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xfs_mount_t *mp;
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int extents_left;
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SPLDECL(s);
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mp = efip->efi_item.li_mountp;
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ASSERT(efip->efi_next_extent > 0);
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ASSERT(efip->efi_flags & XFS_EFI_COMMITTED);
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AIL_LOCK(mp, s);
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ASSERT(efip->efi_next_extent >= nextents);
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efip->efi_next_extent -= nextents;
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extents_left = efip->efi_next_extent;
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if (extents_left == 0) {
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/*
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* xfs_trans_delete_ail() drops the AIL lock.
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*/
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xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s);
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xfs_efi_item_free(efip);
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} else {
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AIL_UNLOCK(mp, s);
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}
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}
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STATIC void
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xfs_efd_item_free(xfs_efd_log_item_t *efdp)
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{
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int nexts = efdp->efd_format.efd_nextents;
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if (nexts > XFS_EFD_MAX_FAST_EXTENTS) {
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kmem_free(efdp, sizeof(xfs_efd_log_item_t) +
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(nexts - 1) * sizeof(xfs_extent_t));
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} else {
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kmem_zone_free(xfs_efd_zone, efdp);
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}
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}
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/*
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* This returns the number of iovecs needed to log the given efd item.
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* We only need 1 iovec for an efd item. It just logs the efd_log_format
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* structure.
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*/
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/*ARGSUSED*/
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STATIC uint
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xfs_efd_item_size(xfs_efd_log_item_t *efdp)
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{
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return 1;
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}
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/*
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* This is called to fill in the vector of log iovecs for the
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* given efd log item. We use only 1 iovec, and we point that
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* at the efd_log_format structure embedded in the efd item.
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* It is at this point that we assert that all of the extent
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* slots in the efd item have been filled.
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*/
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STATIC void
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xfs_efd_item_format(xfs_efd_log_item_t *efdp,
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xfs_log_iovec_t *log_vector)
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{
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uint size;
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ASSERT(efdp->efd_next_extent == efdp->efd_format.efd_nextents);
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efdp->efd_format.efd_type = XFS_LI_EFD;
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size = sizeof(xfs_efd_log_format_t);
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size += (efdp->efd_format.efd_nextents - 1) * sizeof(xfs_extent_t);
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efdp->efd_format.efd_size = 1;
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log_vector->i_addr = (xfs_caddr_t)&(efdp->efd_format);
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log_vector->i_len = size;
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XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_EFD_FORMAT);
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ASSERT(size >= sizeof(xfs_efd_log_format_t));
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}
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/*
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* Pinning has no meaning for an efd item, so just return.
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|
*/
|
|
/*ARGSUSED*/
|
|
STATIC void
|
|
xfs_efd_item_pin(xfs_efd_log_item_t *efdp)
|
|
{
|
|
return;
|
|
}
|
|
|
|
|
|
/*
|
|
* Since pinning has no meaning for an efd item, unpinning does
|
|
* not either.
|
|
*/
|
|
/*ARGSUSED*/
|
|
STATIC void
|
|
xfs_efd_item_unpin(xfs_efd_log_item_t *efdp, int stale)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
STATIC void
|
|
xfs_efd_item_unpin_remove(xfs_efd_log_item_t *efdp, xfs_trans_t *tp)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Efd items have no locking, so just return success.
|
|
*/
|
|
/*ARGSUSED*/
|
|
STATIC uint
|
|
xfs_efd_item_trylock(xfs_efd_log_item_t *efdp)
|
|
{
|
|
return XFS_ITEM_LOCKED;
|
|
}
|
|
|
|
/*
|
|
* Efd items have no locking or pushing, so return failure
|
|
* so that the caller doesn't bother with us.
|
|
*/
|
|
/*ARGSUSED*/
|
|
STATIC void
|
|
xfs_efd_item_unlock(xfs_efd_log_item_t *efdp)
|
|
{
|
|
if (efdp->efd_item.li_flags & XFS_LI_ABORTED)
|
|
xfs_efd_item_free(efdp);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* When the efd item is committed to disk, all we need to do
|
|
* is delete our reference to our partner efi item and then
|
|
* free ourselves. Since we're freeing ourselves we must
|
|
* return -1 to keep the transaction code from further referencing
|
|
* this item.
|
|
*/
|
|
/*ARGSUSED*/
|
|
STATIC xfs_lsn_t
|
|
xfs_efd_item_committed(xfs_efd_log_item_t *efdp, xfs_lsn_t lsn)
|
|
{
|
|
/*
|
|
* If we got a log I/O error, it's always the case that the LR with the
|
|
* EFI got unpinned and freed before the EFD got aborted.
|
|
*/
|
|
if ((efdp->efd_item.li_flags & XFS_LI_ABORTED) == 0)
|
|
xfs_efi_release(efdp->efd_efip, efdp->efd_format.efd_nextents);
|
|
|
|
xfs_efd_item_free(efdp);
|
|
return (xfs_lsn_t)-1;
|
|
}
|
|
|
|
/*
|
|
* There isn't much you can do to push on an efd item. It is simply
|
|
* stuck waiting for the log to be flushed to disk.
|
|
*/
|
|
/*ARGSUSED*/
|
|
STATIC void
|
|
xfs_efd_item_push(xfs_efd_log_item_t *efdp)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* The EFD dependency tracking op doesn't do squat. It can't because
|
|
* it doesn't know where the free extent is coming from. The dependency
|
|
* tracking has to be handled by the "enclosing" metadata object. For
|
|
* example, for inodes, the inode is locked throughout the extent freeing
|
|
* so the dependency should be recorded there.
|
|
*/
|
|
/*ARGSUSED*/
|
|
STATIC void
|
|
xfs_efd_item_committing(xfs_efd_log_item_t *efip, xfs_lsn_t lsn)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* This is the ops vector shared by all efd log items.
|
|
*/
|
|
static struct xfs_item_ops xfs_efd_item_ops = {
|
|
.iop_size = (uint(*)(xfs_log_item_t*))xfs_efd_item_size,
|
|
.iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
|
|
xfs_efd_item_format,
|
|
.iop_pin = (void(*)(xfs_log_item_t*))xfs_efd_item_pin,
|
|
.iop_unpin = (void(*)(xfs_log_item_t*, int))xfs_efd_item_unpin,
|
|
.iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*))
|
|
xfs_efd_item_unpin_remove,
|
|
.iop_trylock = (uint(*)(xfs_log_item_t*))xfs_efd_item_trylock,
|
|
.iop_unlock = (void(*)(xfs_log_item_t*))xfs_efd_item_unlock,
|
|
.iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
|
|
xfs_efd_item_committed,
|
|
.iop_push = (void(*)(xfs_log_item_t*))xfs_efd_item_push,
|
|
.iop_pushbuf = NULL,
|
|
.iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
|
|
xfs_efd_item_committing
|
|
};
|
|
|
|
|
|
/*
|
|
* Allocate and initialize an efd item with the given number of extents.
|
|
*/
|
|
xfs_efd_log_item_t *
|
|
xfs_efd_init(xfs_mount_t *mp,
|
|
xfs_efi_log_item_t *efip,
|
|
uint nextents)
|
|
|
|
{
|
|
xfs_efd_log_item_t *efdp;
|
|
uint size;
|
|
|
|
ASSERT(nextents > 0);
|
|
if (nextents > XFS_EFD_MAX_FAST_EXTENTS) {
|
|
size = (uint)(sizeof(xfs_efd_log_item_t) +
|
|
((nextents - 1) * sizeof(xfs_extent_t)));
|
|
efdp = (xfs_efd_log_item_t*)kmem_zalloc(size, KM_SLEEP);
|
|
} else {
|
|
efdp = (xfs_efd_log_item_t*)kmem_zone_zalloc(xfs_efd_zone,
|
|
KM_SLEEP);
|
|
}
|
|
|
|
efdp->efd_item.li_type = XFS_LI_EFD;
|
|
efdp->efd_item.li_ops = &xfs_efd_item_ops;
|
|
efdp->efd_item.li_mountp = mp;
|
|
efdp->efd_efip = efip;
|
|
efdp->efd_format.efd_nextents = nextents;
|
|
efdp->efd_format.efd_efi_id = efip->efi_format.efi_id;
|
|
|
|
return (efdp);
|
|
}
|