diff options
Diffstat (limited to 'fs/xfs/xfs_trans_ail.c')
| -rw-r--r-- | fs/xfs/xfs_trans_ail.c | 64 |
1 files changed, 36 insertions, 28 deletions
diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c index d4a2445..55326f9 100644 --- a/fs/xfs/xfs_trans_ail.c +++ b/fs/xfs/xfs_trans_ail.c @@ -1,20 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. * Copyright (c) 2008 Dave Chinner * All Rights Reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it would be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include "xfs.h" #include "xfs_fs.h" @@ -32,30 +20,51 @@ #ifdef DEBUG /* * Check that the list is sorted as it should be. + * + * Called with the ail lock held, but we don't want to assert fail with it + * held otherwise we'll lock everything up and won't be able to debug the + * cause. Hence we sample and check the state under the AIL lock and return if + * everything is fine, otherwise we drop the lock and run the ASSERT checks. + * Asserts may not be fatal, so pick the lock back up and continue onwards. */ STATIC void xfs_ail_check( - struct xfs_ail *ailp, - xfs_log_item_t *lip) + struct xfs_ail *ailp, + struct xfs_log_item *lip) { - xfs_log_item_t *prev_lip; + struct xfs_log_item *prev_lip; + struct xfs_log_item *next_lip; + xfs_lsn_t prev_lsn = NULLCOMMITLSN; + xfs_lsn_t next_lsn = NULLCOMMITLSN; + xfs_lsn_t lsn; + bool in_ail; + if (list_empty(&ailp->ail_head)) return; /* - * Check the next and previous entries are valid. + * Sample then check the next and previous entries are valid. */ - ASSERT((lip->li_flags & XFS_LI_IN_AIL) != 0); - prev_lip = list_entry(lip->li_ail.prev, xfs_log_item_t, li_ail); - if (&prev_lip->li_ail != &ailp->ail_head) - ASSERT(XFS_LSN_CMP(prev_lip->li_lsn, lip->li_lsn) <= 0); - - prev_lip = list_entry(lip->li_ail.next, xfs_log_item_t, li_ail); + in_ail = test_bit(XFS_LI_IN_AIL, &lip->li_flags); + prev_lip = list_entry(lip->li_ail.prev, struct xfs_log_item, li_ail); if (&prev_lip->li_ail != &ailp->ail_head) - ASSERT(XFS_LSN_CMP(prev_lip->li_lsn, lip->li_lsn) >= 0); + prev_lsn = prev_lip->li_lsn; + next_lip = list_entry(lip->li_ail.next, struct xfs_log_item, li_ail); + if (&next_lip->li_ail != &ailp->ail_head) + next_lsn = next_lip->li_lsn; + lsn = lip->li_lsn; + if (in_ail && + (prev_lsn == NULLCOMMITLSN || XFS_LSN_CMP(prev_lsn, lsn) <= 0) && + (next_lsn == NULLCOMMITLSN || XFS_LSN_CMP(next_lsn, lsn) >= 0)) + return; + spin_unlock(&ailp->ail_lock); + ASSERT(in_ail); + ASSERT(prev_lsn == NULLCOMMITLSN || XFS_LSN_CMP(prev_lsn, lsn) <= 0); + ASSERT(next_lsn == NULLCOMMITLSN || XFS_LSN_CMP(next_lsn, lsn) >= 0); + spin_lock(&ailp->ail_lock); } #else /* !DEBUG */ #define xfs_ail_check(a,l) @@ -684,7 +693,7 @@ xfs_trans_ail_update_bulk( for (i = 0; i < nr_items; i++) { struct xfs_log_item *lip = log_items[i]; - if (lip->li_flags & XFS_LI_IN_AIL) { + if (test_and_set_bit(XFS_LI_IN_AIL, &lip->li_flags)) { /* check if we really need to move the item */ if (XFS_LSN_CMP(lsn, lip->li_lsn) <= 0) continue; @@ -694,7 +703,6 @@ xfs_trans_ail_update_bulk( if (mlip == lip) mlip_changed = 1; } else { - lip->li_flags |= XFS_LI_IN_AIL; trace_xfs_ail_insert(lip, 0, lsn); } lip->li_lsn = lsn; @@ -725,7 +733,7 @@ xfs_ail_delete_one( trace_xfs_ail_delete(lip, mlip->li_lsn, lip->li_lsn); xfs_ail_delete(ailp, lip); xfs_clear_li_failed(lip); - lip->li_flags &= ~XFS_LI_IN_AIL; + clear_bit(XFS_LI_IN_AIL, &lip->li_flags); lip->li_lsn = 0; return mlip == lip; @@ -761,7 +769,7 @@ xfs_trans_ail_delete( struct xfs_mount *mp = ailp->ail_mount; bool mlip_changed; - if (!(lip->li_flags & XFS_LI_IN_AIL)) { + if (!test_bit(XFS_LI_IN_AIL, &lip->li_flags)) { spin_unlock(&ailp->ail_lock); if (!XFS_FORCED_SHUTDOWN(mp)) { xfs_alert_tag(mp, XFS_PTAG_AILDELETE, |
