diff options
| author | Mohan Srinivasan <mohans@FreeBSD.org> | 2006-06-23 00:42:26 +0000 |
|---|---|---|
| committer | Mohan Srinivasan <mohans@FreeBSD.org> | 2006-06-23 00:42:26 +0000 |
| commit | 5943f1a781b17ee5a906774514f0643f74da44fb (patch) | |
| tree | 28afbf244f1b73f4563b7891d8bbbe8cb47a5315 /sys/nfsserver | |
| parent | f8910b42c8671d92c1d53e405e61921af1e5d12d (diff) | |
Notes
Diffstat (limited to 'sys/nfsserver')
| -rw-r--r-- | sys/nfsserver/nfs_srvcache.c | 22 | ||||
| -rw-r--r-- | sys/nfsserver/nfsrvcache.h | 4 |
2 files changed, 22 insertions, 4 deletions
diff --git a/sys/nfsserver/nfs_srvcache.c b/sys/nfsserver/nfs_srvcache.c index 7873ea23f8b3..a1164147364e 100644 --- a/sys/nfsserver/nfs_srvcache.c +++ b/sys/nfsserver/nfs_srvcache.c @@ -49,6 +49,7 @@ __FBSDID("$FreeBSD$"); #include <sys/mutex.h> #include <sys/socket.h> #include <sys/socketvar.h> /* for sodupsockaddr */ +#include <sys/eventhandler.h> #include <netinet/in.h> #include <nfs/rpcv2.h> @@ -57,7 +58,7 @@ __FBSDID("$FreeBSD$"); #include <nfsserver/nfsrvcache.h> static long numnfsrvcache; -static long desirednfsrvcache = NFSRVCACHESIZ; +static long desirednfsrvcache; #define NFSRCHASH(xid) \ (&nfsrvhashtbl[((xid) + ((xid) >> 24)) & nfsrvhash]) @@ -122,15 +123,32 @@ static const int nfsv2_repstat[NFS_NPROCS] = { FALSE, }; +/* + * Size the NFS server's duplicate request cache at 1/2 the nmbclsters, floating + * within a (64, 2048) range. This is to prevent all mbuf clusters being tied up + * in the NFS dupreq cache for small values of nmbclusters. + */ +static void +nfsrvcache_size_change(void *tag) +{ + desirednfsrvcache = nmbclusters /2; + if (desirednfsrvcache > NFSRVCACHE_MAX_SIZE) + desirednfsrvcache = NFSRVCACHE_MAX_SIZE; + if (desirednfsrvcache < NFSRVCACHE_MIN_SIZE) + desirednfsrvcache = NFSRVCACHE_MIN_SIZE; +} + /* * Initialize the server request cache list */ void nfsrv_initcache(void) { - + nfsrvcache_size_change(NULL); nfsrvhashtbl = hashinit(desirednfsrvcache, M_NFSD, &nfsrvhash); TAILQ_INIT(&nfsrvlruhead); + EVENTHANDLER_REGISTER(nmbclusters_change, nfsrvcache_size_change, NULL, + EVENTHANDLER_PRI_FIRST); } /* diff --git a/sys/nfsserver/nfsrvcache.h b/sys/nfsserver/nfsrvcache.h index 266aaa9aa592..66176f4a26c2 100644 --- a/sys/nfsserver/nfsrvcache.h +++ b/sys/nfsserver/nfsrvcache.h @@ -41,8 +41,8 @@ /* * Definitions for the server recent request cache */ - -#define NFSRVCACHESIZ 2048 +#define NFSRVCACHE_MAX_SIZE 2048 +#define NFSRVCACHE_MIN_SIZE 64 struct nfsrvcache { TAILQ_ENTRY(nfsrvcache) rc_lru; /* LRU chain */ |