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| author | Andy Adamson <andros@netapp.com> | 2009-08-28 08:45:01 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@citi.umich.edu> | 2009-09-01 22:24:05 -0400 |
| commit | a649637c73a36174287a403cdda7607177d64523 (patch) | |
| tree | 8aec8e30b2f4cceaee9fa5ddaa88e694ea3e09dd /include/linux/nfsd | |
| parent | a06b1261bdb580b35967d0e055d1ab131b332254 (diff) | |
| download | lwn-a649637c73a36174287a403cdda7607177d64523.tar.gz lwn-a649637c73a36174287a403cdda7607177d64523.zip | |
nfsd41: bound forechannel drc size by memory usage
By using the requested ca_maxresponsesize_cached * ca_maxresponses to bound
a forechannel drc request size, clients can tailor a session to usage.
For example, an I/O session (READ/WRITE only) can have a much smaller
ca_maxresponsesize_cached (for only WRITE compound responses) and a lot larger
ca_maxresponses to service a large in-flight data window.
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Diffstat (limited to 'include/linux/nfsd')
| -rw-r--r-- | include/linux/nfsd/state.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/include/linux/nfsd/state.h b/include/linux/nfsd/state.h index fb0c404c7c5c..ff0b771efde6 100644 --- a/include/linux/nfsd/state.h +++ b/include/linux/nfsd/state.h @@ -92,13 +92,17 @@ struct nfs4_cb_conn { struct rpc_cred * cb_cred; }; -/* Maximum number of slots per session. 128 is useful for long haul TCP */ -#define NFSD_MAX_SLOTS_PER_SESSION 128 +/* Maximum number of slots per session. 160 is useful for long haul TCP */ +#define NFSD_MAX_SLOTS_PER_SESSION 160 /* Maximum number of pages per slot cache entry */ #define NFSD_PAGES_PER_SLOT 1 #define NFSD_SLOT_CACHE_SIZE PAGE_SIZE /* Maximum number of operations per session compound */ #define NFSD_MAX_OPS_PER_COMPOUND 16 +/* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */ +#define NFSD_CACHE_SIZE_SLOTS_PER_SESSION 32 +#define NFSD_MAX_MEM_PER_SESSION \ + (NFSD_CACHE_SIZE_SLOTS_PER_SESSION * NFSD_SLOT_CACHE_SIZE) struct nfsd4_cache_entry { __be32 ce_status; |