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authorTrond Myklebust <Trond.Myklebust@netapp.com>2010-03-19 17:55:17 (GMT)
committerTrond Myklebust <Trond.Myklebust@netapp.com>2010-03-19 17:55:17 (GMT)
commitd812e575822a2b7ab1a7cadae2571505ec6ec2bd (patch)
treeb94dad3a91d968a7851b65ce9f3f4960d9d99d6b /fs/nfs/file.c
parentfc7f99cf36ebae853639dabb43bc2f0098c59aef (diff)
downloadlinux-d812e575822a2b7ab1a7cadae2571505ec6ec2bd.tar.xz
NFS: Prevent another deadlock in nfs_release_page()
We should not attempt to free the page if __GFP_FS is not set. Otherwise we can deadlock as per http://bugzilla.kernel.org/show_bug.cgi?id=15578 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@kernel.org
Diffstat (limited to 'fs/nfs/file.c')
-rw-r--r--fs/nfs/file.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index ae8d022..ae0d927 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -491,7 +491,8 @@ static int nfs_release_page(struct page *page, gfp_t gfp)
{
dfprintk(PAGECACHE, "NFS: release_page(%p)\n", page);
- if (gfp & __GFP_WAIT)
+ /* Only do I/O if gfp is a superset of GFP_KERNEL */
+ if ((gfp & GFP_KERNEL) == GFP_KERNEL)
nfs_wb_page(page->mapping->host, page);
/* If PagePrivate() is set, then the page is not freeable */
if (PagePrivate(page))