This is a note to let you know that I've just added the patch titled
nfsd: Don't keep looking up unhashed files in the nfsd file cache
to the 5.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
nfsd-don-t-keep-looking-up-unhashed-files-in-the-nfsd-file-cache.patch
and it can be found in the queue-5.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d30881f573e565ebb5dbb50b31ed6106b5c81328 Mon Sep 17 00:00:00 2001
From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
Date: Thu, 18 Feb 2021 21:02:07 -0500
Subject: nfsd: Don't keep looking up unhashed files in the nfsd file cache
From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxx>
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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;
}
Patches currently in stable-queue which might be from trond.myklebust@xxxxxxxxxxxxxxx are
queue-5.11/nfsd-don-t-keep-looking-up-unhashed-files-in-the-nfsd-file-cache.patch
