diff options
| author | Darrick J. Wong <djwong@kernel.org> | 2021-01-22 16:48:35 -0800 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2021-02-03 09:18:49 -0800 |
| commit | f41a0716f4b08678a73173d71ff3f409b996df2d (patch) | |
| tree | 728234ab4e24393a45fd8c6c918296321fc9258c | |
| parent | a636b1d1cf73804e385990c975e33cf06c032b64 (diff) | |
xfs: don't stall cowblocks scan if we can't take locks
Don't stall the cowblocks scan on a locked inode if we possibly can.
We'd much rather the background scanner keep moving.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
| -rw-r--r-- | fs/xfs/xfs_icache.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c index c71eb15e3835..89f9e692fde7 100644 --- a/fs/xfs/xfs_icache.c +++ b/fs/xfs/xfs_icache.c @@ -1605,17 +1605,31 @@ xfs_inode_free_cowblocks( void *args) { struct xfs_eofblocks *eofb = args; + bool wait; int ret = 0; + wait = eofb && (eofb->eof_flags & XFS_EOF_FLAGS_SYNC); + if (!xfs_prep_free_cowblocks(ip)) return 0; if (!xfs_inode_matches_eofb(ip, eofb)) return 0; - /* Free the CoW blocks */ - xfs_ilock(ip, XFS_IOLOCK_EXCL); - xfs_ilock(ip, XFS_MMAPLOCK_EXCL); + /* + * If the caller is waiting, return -EAGAIN to keep the background + * scanner moving and revisit the inode in a subsequent pass. + */ + if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) { + if (wait) + return -EAGAIN; + return 0; + } + if (!xfs_ilock_nowait(ip, XFS_MMAPLOCK_EXCL)) { + if (wait) + ret = -EAGAIN; + goto out_iolock; + } /* * Check again, nobody else should be able to dirty blocks or change @@ -1625,6 +1639,7 @@ xfs_inode_free_cowblocks( ret = xfs_reflink_cancel_cow_range(ip, 0, NULLFILEOFF, false); xfs_iunlock(ip, XFS_MMAPLOCK_EXCL); +out_iolock: xfs_iunlock(ip, XFS_IOLOCK_EXCL); return ret; |