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| author | David Chinner <david@fromorbit.com> | 2008-10-30 17:55:27 +1100 |
|---|---|---|
| committer | Lachlan McIlroy <lachlan@sgi.com> | 2008-10-30 17:55:27 +1100 |
| commit | 56e73ec47d749047f441e6b9d60d964535d31c3b (patch) | |
| tree | 73423b4b01d760f95c5dcf1cff38ba4b56f6c969 /fs/xfs/xfs_iget.c | |
| parent | 2b7035fd7473c799ca3372092d72c768c7db329d (diff) | |
| download | linux-56e73ec47d749047f441e6b9d60d964535d31c3b.tar.gz linux-56e73ec47d749047f441e6b9d60d964535d31c3b.tar.bz2 linux-56e73ec47d749047f441e6b9d60d964535d31c3b.zip | |
[XFS] Can't lock inodes in radix tree preload region
When we are inside a radix tree preload region, we cannot sleep. Recently
we moved the inode locking inside the preload region for the inode radix
tree. Fix that, and fix a missed unlock in another error path in the same
code at the same time.
SGI-PV: 987246
SGI-Modid: xfs-linux-melb:xfs-kern:32385a
Signed-off-by: David Chinner <david@fromorbit.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Diffstat (limited to 'fs/xfs/xfs_iget.c')
| -rw-r--r-- | fs/xfs/xfs_iget.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c index a1f209b0596f..377c0cd14999 100644 --- a/fs/xfs/xfs_iget.c +++ b/fs/xfs/xfs_iget.c @@ -159,18 +159,19 @@ xfs_iget_cache_miss( goto out_destroy; } + if (lock_flags) + xfs_ilock(ip, lock_flags); + /* * Preload the radix tree so we can insert safely under the - * write spinlock. + * write spinlock. Note that we cannot sleep inside the preload + * region. */ if (radix_tree_preload(GFP_KERNEL)) { error = EAGAIN; - goto out_destroy; + goto out_unlock; } - if (lock_flags) - xfs_ilock(ip, lock_flags); - mask = ~(((XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog)) - 1); first_index = agino & mask; write_lock(&pag->pag_ici_lock); @@ -181,7 +182,7 @@ xfs_iget_cache_miss( WARN_ON(error != -EEXIST); XFS_STATS_INC(xs_ig_dup); error = EAGAIN; - goto out_unlock; + goto out_preload_end; } /* These values _must_ be set before releasing the radix tree lock! */ @@ -193,9 +194,12 @@ xfs_iget_cache_miss( *ipp = ip; return 0; -out_unlock: +out_preload_end: write_unlock(&pag->pag_ici_lock); radix_tree_preload_end(); +out_unlock: + if (lock_flags) + xfs_iunlock(ip, lock_flags); out_destroy: xfs_idestroy(ip); return error; |