| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.11 046/120] nfsd: Dont keep looking up unhashed files in the nfsd file cache | Date | Mon, 22 Mar 2021 13:27:09 +0100 |
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From: Trond Myklebust <trond.myklebust@hammerspace.com>
commit d30881f573e565ebb5dbb50b31ed6106b5c81328 upstream.
If a file is unhashed, then we're going to reject it anyway and retry, so make sure we skip it when we're doing the RCU lockless lookup. This avoids a number of unnecessary nfserr_jukebox returns from nfsd_file_acquire()
Fixes: 65294c1f2c5e ("nfsd: add a new struct file caching facility to nfsd") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- fs/nfsd/filecache.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -898,6 +898,8 @@ nfsd_file_find_locked(struct inode *inod continue; if (!nfsd_match_cred(nf->nf_cred, current_cred())) continue; + if (!test_bit(NFSD_FILE_HASHED, &nf->nf_flags)) + continue; if (nfsd_file_get(nf) != NULL) return nf; }
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