[PATCH] Don't allow memory reclaim to wait on the filesystem in inode writeback

[David Chinner <dgc@xxxxxxx>]

Don't allow memory reclaim to wait on the filesystem in inode writeback

If we allow memory reclaim to wait on the pages under writeback in
inode cluster writeback we could deadlock because we are currently
holding the ILOCK on the initial writeback inode which is needed in
data I/O completion to change the file size or do unwritten extent
conversion before the pages are taken out of writeback state.

Signed-off-by: Dave Chinner <dgc@xxxxxxx>
---
 fs/xfs/xfs_inode.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: 2.6.x-xfs-new/fs/xfs/xfs_inode.c
===================================================================
--- 2.6.x-xfs-new.orig/fs/xfs/xfs_inode.c       2008-04-28 16:35:23.000000000 
+1000
+++ 2.6.x-xfs-new/fs/xfs/xfs_inode.c    2008-05-01 20:04:55.151880341 +1000
@@ -2986,7 +2986,7 @@ xfs_iflush_cluster(
        ASSERT(pag->pag_ici_init);
 
        ilist_size = XFS_INODE_CLUSTER_SIZE(mp) * sizeof(xfs_inode_t *);
-       ilist = kmem_alloc(ilist_size, KM_MAYFAIL);
+       ilist = kmem_alloc(ilist_size, KM_NOFS);
        if (!ilist)
                return 0;