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| author | J. Bruce Fields <bfields@citi.umich.edu> | 2009-10-24 20:52:16 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@citi.umich.edu> | 2009-10-27 19:34:43 -0400 |
| commit | efe0cb6d5a1f20ad4df045a055048afed4c5e660 (patch) | |
| tree | 850a3205944995a78f321cac0ed04cb260055d14 | |
| parent | dd829c45640ff14d7a039af40b3b3975f1b2e484 (diff) | |
nfsd4.1: common slot allocation size calculation
We do the same calculation in a couple places; use a helper function,
and add a little documentation, in the hopes of preventing bugs like
that fixed in the last patch.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| -rw-r--r-- | fs/nfsd/nfs4state.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index c1713711041..42dab9587af 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -524,6 +524,15 @@ free_session_slots(struct nfsd4_session *ses) kfree(ses->se_slots[i]); } +/* + * We don't actually need to cache the rpc and session headers, so we + * can allocate a little less for each slot: + */ +static inline int slot_bytes(struct nfsd4_channel_attrs *ca) +{ + return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; +} + static int alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) @@ -555,7 +564,7 @@ alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, memcpy(new, &tmp, sizeof(*new)); /* allocate each struct nfsd4_slot and data cache in one piece */ - cachesize = new->se_fchannel.maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; + cachesize = slot_bytes(&new->se_fchannel); for (i = 0; i < new->se_fchannel.maxreqs; i++) { sp = kzalloc(sizeof(*sp) + cachesize, GFP_KERNEL); if (!sp) @@ -633,8 +642,7 @@ free_session(struct kref *kref) ses = container_of(kref, struct nfsd4_session, se_ref); spin_lock(&nfsd_drc_lock); - mem = ses->se_fchannel.maxreqs - * (ses->se_fchannel.maxresp_cached - NFSD_MIN_HDR_SEQ_SZ); + mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); nfsd_drc_mem_used -= mem; spin_unlock(&nfsd_drc_lock); free_session_slots(ses); |