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xfs: don't block inode reclaim on the ILOCK 

When we attempt to reclaim an inode, the first thing we do is take
the inode lock. This is blocking right now, so if the inode being
accessed by something else (e.g. being flushed to the cluster
buffer) we will block here.

Change this to a trylock so that we do not block inode reclaim
unnecessarily here.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Dave Chinner 2020-06-29 14:49:17 -07:00 committed by Darrick J. Wong
parent 0e8e2c6343
commit 9552e14d3e
1 changed files with 5 additions and 3 deletions
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8
fs/xfs/xfs_icache.c
View File

@ -1119,9 +1119,10 @@ xfs_reclaim_inode(
{
xfs_ino_t ino = ip->i_ino; /* for radix_tree_delete */
xfs_ilock(ip, XFS_ILOCK_EXCL);
if (!xfs_iflock_nowait(ip))
if (!xfs_ilock_nowait(ip, XFS_ILOCK_EXCL))
goto out;
if (!xfs_iflock_nowait(ip))
goto out_iunlock;
if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
xfs_iunpin_wait(ip);
@ -1188,8 +1189,9 @@ reclaim:
out_ifunlock:
xfs_ifunlock(ip);
out:
out_iunlock:
xfs_iunlock(ip, XFS_ILOCK_EXCL);
out:
xfs_iflags_clear(ip, XFS_IRECLAIM);
return false;
}