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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>
This commit is contained in:
Trond Myklebust 2010-05-13 12:51:06 -04:00
parent 2067340653
commit 61d5eb2985
1 changed files with 2 additions and 0 deletions
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2
fs/nfs/dir.c
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@ -1703,6 +1703,8 @@ int nfs_access_cache_shrinker(int nr_to_scan, gfp_t gfp_mask)
struct nfs_inode *nfsi; struct nfs_inode *nfsi;
struct nfs_access_entry *cache; struct nfs_access_entry *cache;
if ((gfp_mask & GFP_KERNEL) != GFP_KERNEL)
return (nr_to_scan == 0) ? 0 : -1;
restart: restart:
spin_lock(&nfs_access_lru_lock); spin_lock(&nfs_access_lru_lock);
list_for_each_entry(nfsi, &nfs_access_lru_list, access_cache_inode_lru) { list_for_each_entry(nfsi, &nfs_access_lru_list, access_cache_inode_lru) {