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| author | J. Bruce Fields <bfields@citi.umich.edu> | 2009-10-21 17:54:13 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@citi.umich.edu> | 2009-10-27 19:34:43 -0400 |
| commit | dd829c45640ff14d7a039af40b3b3975f1b2e484 (patch) | |
| tree | e19e0b89419521e5baeb095ca858493a2d47bcf7 /fs/nfsd | |
| parent | dc7a08166f3a5f23e79e839a8a88849bd3397c32 (diff) | |
| download | linux-3.10-dd829c45640ff14d7a039af40b3b3975f1b2e484.tar.gz linux-3.10-dd829c45640ff14d7a039af40b3b3975f1b2e484.tar.bz2 linux-3.10-dd829c45640ff14d7a039af40b3b3975f1b2e484.zip | |
nfsd4.1: fix session memory use calculation
Unbalanced calculations on creation and destruction of sessions could
cause our estimate of cache memory used to become negative, sometimes
resulting in spurious SERVERFAULT returns to client CREATE_SESSION
requests.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Diffstat (limited to 'fs/nfsd')
| -rw-r--r-- | fs/nfsd/nfs4state.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index fcb9817881a..c1713711041 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -629,10 +629,13 @@ void free_session(struct kref *kref) { struct nfsd4_session *ses; + int mem; ses = container_of(kref, struct nfsd4_session, se_ref); spin_lock(&nfsd_drc_lock); - nfsd_drc_mem_used -= ses->se_fchannel.maxreqs * NFSD_SLOT_CACHE_SIZE; + mem = ses->se_fchannel.maxreqs + * (ses->se_fchannel.maxresp_cached - NFSD_MIN_HDR_SEQ_SZ); + nfsd_drc_mem_used -= mem; spin_unlock(&nfsd_drc_lock); free_session_slots(ses); kfree(ses); |