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authorDave Chinner <dchinner@redhat.com>2010-12-23 03:57:37 +0300
committerDave Chinner <david@fromorbit.com>2010-12-23 03:57:37 +0300
commit622d81494fa32343a4b97b607619656c7a4a6d1a (patch)
treeb8a004167d57b577c5da563474f8eb32eff83393 /fs/xfs/xfs_attr_leaf.c
parentdcfcf20512cb517ac18b9433b676183fa1257911 (diff)
downloadlinux-622d81494fa32343a4b97b607619656c7a4a6d1a.tar.xz
xfs: use KM_NOFS for allocations during attribute list operations
When listing attributes, we are doiing memory allocations under the inode ilock using only KM_SLEEP. This allows memory allocation to recurse back into the filesystem and do writeback, which may the ilock we already hold on the current inode. THis will deadlock. Hence use KM_NOFS for such allocations outside of transaction context to ensure that reclaim recursion does not occur. Reported-by: Nick Piggin <npiggin@gmail.com> Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/xfs/xfs_attr_leaf.c')
-rw-r--r--fs/xfs/xfs_attr_leaf.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/xfs/xfs_attr_leaf.c b/fs/xfs/xfs_attr_leaf.c
index a6cff8edcdb6..71e90dc2aeb1 100644
--- a/fs/xfs/xfs_attr_leaf.c
+++ b/fs/xfs/xfs_attr_leaf.c
@@ -637,7 +637,7 @@ xfs_attr_shortform_list(xfs_attr_list_context_t *context)
* It didn't all fit, so we have to sort everything on hashval.
*/
sbsize = sf->hdr.count * sizeof(*sbuf);
- sbp = sbuf = kmem_alloc(sbsize, KM_SLEEP);
+ sbp = sbuf = kmem_alloc(sbsize, KM_SLEEP | KM_NOFS);
/*
* Scan the attribute list for the rest of the entries, storing
@@ -2386,7 +2386,7 @@ xfs_attr_leaf_list_int(xfs_dabuf_t *bp, xfs_attr_list_context_t *context)
args.dp = context->dp;
args.whichfork = XFS_ATTR_FORK;
args.valuelen = valuelen;
- args.value = kmem_alloc(valuelen, KM_SLEEP);
+ args.value = kmem_alloc(valuelen, KM_SLEEP | KM_NOFS);
args.rmtblkno = be32_to_cpu(name_rmt->valueblk);
args.rmtblkcnt = XFS_B_TO_FSB(args.dp->i_mount, valuelen);
retval = xfs_attr_rmtval_get(&args);