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| author | Arnd Bergmann <arnd@arndb.de> | 2019-11-04 14:43:17 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-11 04:34:13 -0800 |
| commit | fdbc75c7cb7535890b948b16d349bb7de0d37664 (patch) | |
| tree | 5bdccb8a336e8a931a60b7362c839f033e38eb57 /fs/nfsd | |
| parent | 70b43a9da1e5c54e80528c7ed911a82cc78df1b7 (diff) | |
| download | linux-stable-fdbc75c7cb7535890b948b16d349bb7de0d37664.tar.gz linux-stable-fdbc75c7cb7535890b948b16d349bb7de0d37664.tar.bz2 linux-stable-fdbc75c7cb7535890b948b16d349bb7de0d37664.zip | |
nfsd: fix jiffies/time_t mixup in LRU list
commit 9594497f2c78993cb66b696122f7c65528ace985 upstream.
The nfsd4_blocked_lock->nbl_time timestamp is recorded in jiffies,
but then compared to a CLOCK_REALTIME timestamp later on, which makes
no sense.
For consistency with the other timestamps, change this to use a time_t.
This is a change in behavior, which may cause regressions, but the
current code is not sensible. On a system with CONFIG_HZ=1000,
the 'time_after((unsigned long)nbl->nbl_time, (unsigned long)cutoff))'
check is false for roughly the first 18 days of uptime and then true
for the next 49 days.
Fixes: 7919d0a27f1e ("nfsd: add a LRU list for blocked locks")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/nfsd')
| -rw-r--r-- | fs/nfsd/nfs4state.c | 2 | ||||
| -rw-r--r-- | fs/nfsd/state.h | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index c8ce128e0054..ed73e86194fa 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -6075,7 +6075,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, } if (fl_flags & FL_SLEEP) { - nbl->nbl_time = jiffies; + nbl->nbl_time = get_seconds(); spin_lock(&nn->blocked_locks_lock); list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked); list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru); diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index 0f07ad6dc1ef..594fc1a8b672 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -592,7 +592,7 @@ static inline bool nfsd4_stateid_generation_after(stateid_t *a, stateid_t *b) struct nfsd4_blocked_lock { struct list_head nbl_list; struct list_head nbl_lru; - unsigned long nbl_time; + time_t nbl_time; struct file_lock nbl_lock; struct knfsd_fh nbl_fh; struct nfsd4_callback nbl_cb; |