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xfs: switch to NOFS allocation under i_lock in xfs_attr_rmtval_get

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xfs_attr_rmtval_get is always called with i_lock held, but i_lock is taken
in reclaim context so all allocations under it must avoid recursions into
the filesystem.

Reported by the new reclaim context tracing in lockdep.

Signed-off-by: Christoph Hellwig <[email protected]>
Reviewed-by: Felix Blyakher <[email protected]>
Signed-off-by: Felix Blyakher <[email protected]>
This commit is contained in:
Christoph Hellwig 2009-07-18 18:15:01 -04:00 • committed by Felix Blyakher
commit ddd3a14e0f
1 changed files with 3 additions and 1 deletions
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4
fs/xfs/xfs_attr.c
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@ -2010,7 +2010,9 @@ xfs_attr_rmtval_get(xfs_da_args_t *args)
dblkno = XFS_FSB_TO_DADDR(mp, map[i].br_startblock);
blkcnt = XFS_FSB_TO_BB(mp, map[i].br_blockcount);
error = xfs_read_buf(mp, mp->m_ddev_targp, dblkno,
blkcnt, XFS_BUF_LOCK, &bp);
blkcnt,
XFS_BUF_LOCK | XBF_DONT_BLOCK,
&bp);
if (error)
return(error);