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xfs: Avoid inodes in reclaim when flushing from inode cache

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commit 018027be90 upstream

The reclaim code will handle flushing of dirty inodes before reclaim
occurs, so avoid them when determining whether an inode is a
candidate for flushing to disk when walking the radix trees.  This
is based on a test patch from Christoph Hellwig.

Signed-off-by: Dave Chinner <david@fromorbit.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Dave Chinner 2010-03-12 09:42:09 +11:00 committed by Greg Kroah-Hartman
parent 96ce91ba51
commit 22a482c621
1 changed files with 18 additions and 13 deletions
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31
fs/xfs/linux-2.6/xfs_sync.c
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@ -179,26 +179,31 @@ xfs_sync_inode_valid(
struct xfs_perag *pag)
{
struct inode *inode = VFS_I(ip);
int error = EFSCORRUPTED;
/* nothing to sync during shutdown */
if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
read_unlock(&pag->pag_ici_lock);
return EFSCORRUPTED;
}
if (XFS_FORCED_SHUTDOWN(ip->i_mount))
goto out_unlock;
/* If we can't get a reference on the inode, it must be in reclaim. */
if (!igrab(inode)) {
read_unlock(&pag->pag_ici_lock);
return ENOENT;
}
read_unlock(&pag->pag_ici_lock);
/* avoid new or reclaimable inodes. Leave for reclaim code to flush */
error = ENOENT;
if (xfs_iflags_test(ip, XFS_INEW | XFS_IRECLAIMABLE | XFS_IRECLAIM))
goto out_unlock;
if (is_bad_inode(inode) || xfs_iflags_test(ip, XFS_INEW)) {
/* If we can't grab the inode, it must on it's way to reclaim. */
if (!igrab(inode))
goto out_unlock;
if (is_bad_inode(inode)) {
IRELE(ip);
return ENOENT;
goto out_unlock;
}
return 0;
/* inode is valid */
error = 0;
out_unlock:
read_unlock(&pag->pag_ici_lock);
return error;
}
STATIC int