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authorLinus Torvalds <torvalds@linux-foundation.org>2016-01-22 10:54:13 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-22 10:54:13 -0800
commitd5ffdf8b4ac6e6db5702ba31870c476d5fa30660 (patch)
tree7c02b8c5de5dbab4d6c9fb2b6154a781818d83e7 /fs/xfs/xfs_buf.c
parenteadee0ce6fd33defe449c97e671bf83fa230b5de (diff)
parentee3804d9f94c5a391c66386b70b9fe5a58775507 (diff)
Merge tag 'xfs-for-linus-4.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs
Pull more xfs updates from Dave Chinner: "This is the second update for XFS that I mentioned in the original pull request last week. It contains a revert for a suspend regression in 4.4 and a fix for a long standing log recovery issue that has been further exposed by all the log recovery changes made in the original 4.5 merge. There is one more thing in this pull request - one that I forgot to merge into the origin. That is, pulling the XFS_IOC_FS[GS]ETXATTR ioctl up to the VFS level so that other filesystems can also use it for modifying project quota IDs Summary: - promotion of XFS_IOC_FS[GS]ETXATTR ioctl to the vfs level so that it can be shared with other filesystems. The ext4 project quota functionality is the first target for this. The commits in this series have not been updated with review or final SOB tags because the branch they were originally published in was needed by ext4. Those tags are: Reviewed-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Dave Chinner <david@fromrobit.com> - Revert a change that is causing suspend failures. - Fix a use-after-free that can occur on log mount failures. Been around forever, but now exposed by other changes to log recovery made in the first 4.5 merge" * tag 'xfs-for-linus-4.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs: xfs: log mount failures don't wait for buffers to be released Revert "xfs: clear PF_NOFREEZE for xfsaild kthread" xfs: introduce per-inode DAX enablement xfs: use FS_XFLAG definitions directly fs: XFS_IOC_FS[SG]SETXATTR to FS_IOC_FS[SG]ETXATTR promotion
Diffstat (limited to 'fs/xfs/xfs_buf.c')
-rw-r--r--fs/xfs/xfs_buf.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index daed4bfb85b2..435c7de42e5f 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -1527,6 +1527,16 @@ xfs_wait_buftarg(
LIST_HEAD(dispose);
int loop = 0;
+ /*
+ * We need to flush the buffer workqueue to ensure that all IO
+ * completion processing is 100% done. Just waiting on buffer locks is
+ * not sufficient for async IO as the reference count held over IO is
+ * not released until after the buffer lock is dropped. Hence we need to
+ * ensure here that all reference counts have been dropped before we
+ * start walking the LRU list.
+ */
+ drain_workqueue(btp->bt_mount->m_buf_workqueue);
+
/* loop until there is nothing left on the lru list. */
while (list_lru_count(&btp->bt_lru)) {
list_lru_walk(&btp->bt_lru, xfs_buftarg_wait_rele,