NFS: Don't run nfs_access_cache_shrinker() when the mask is GFP_NOFS

Both iput() and put_rpccred() might allocate memory under certain
circumstances, so make sure that we don't recurse and deadlock...

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

parent 20673406

fs/nfs/dir.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1703,6 +1703,8 @@ int nfs_access_cache_shrinker(int nr_to_scan, gfp_t gfp_mask)
		struct nfs_inode *nfsi;
		struct nfs_access_entry *cache;

		if ((gfp_mask & GFP_KERNEL) != GFP_KERNEL)
		return (nr_to_scan == 0) ? 0 : -1;
		restart:
		spin_lock(&nfs_access_lru_lock);
		list_for_each_entry(nfsi, &nfs_access_lru_list, access_cache_inode_lru) {