From: trondmy@kernel.org
To: Chuck Lever <chuck.lever@oracle.com>, Jan Kara <jack@suse.cz>
Cc: linux-nfs@vger.kernel.org
Subject: [PATCH 2/2] nfsd: Clean up nfsd_file_put()
Date: Thu, 31 Mar 2022 09:54:02 -0400 [thread overview]
Message-ID: <20220331135402.7187-2-trondmy@kernel.org> (raw)
In-Reply-To: <20220331135402.7187-1-trondmy@kernel.org>
From: Trond Myklebust <trond.myklebust@hammerspace.com>
Make it a little less racy, by removing the refcount_read() test. Then
remove the redundant 'is_hashed' variable.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
fs/nfsd/filecache.c | 13 +++----------
1 file changed, 3 insertions(+), 10 deletions(-)
diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c
index 9578a6317709..46714a71ec87 100644
--- a/fs/nfsd/filecache.c
+++ b/fs/nfsd/filecache.c
@@ -301,21 +301,14 @@ nfsd_file_put_noref(struct nfsd_file *nf)
void
nfsd_file_put(struct nfsd_file *nf)
{
- bool is_hashed;
-
set_bit(NFSD_FILE_REFERENCED, &nf->nf_flags);
- if (refcount_read(&nf->nf_ref) > 2 || !nf->nf_file) {
- nfsd_file_put_noref(nf);
- return;
- }
-
- is_hashed = test_bit(NFSD_FILE_HASHED, &nf->nf_flags) != 0;
- if (!is_hashed) {
+ if (test_bit(NFSD_FILE_HASHED, &nf->nf_flags) == 0) {
nfsd_file_flush(nf);
nfsd_file_put_noref(nf);
} else {
nfsd_file_put_noref(nf);
- nfsd_file_schedule_laundrette();
+ if (nf->nf_file)
+ nfsd_file_schedule_laundrette();
}
if (atomic_long_read(&nfsd_filecache_count) >= NFSD_FILE_LRU_LIMIT)
nfsd_file_gc();
--
2.35.1
next prev parent reply other threads:[~2022-03-31 14:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-31 13:54 [PATCH 1/2] nfsd: Fix a write performance regression trondmy
2022-03-31 13:54 ` trondmy [this message]
2022-03-31 14:36 ` Jan Kara
2022-03-31 14:38 ` Chuck Lever III
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