diff options
Diffstat (limited to 'sys/nfsserver/nfs_srvcache.c')
| -rw-r--r-- | sys/nfsserver/nfs_srvcache.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/sys/nfsserver/nfs_srvcache.c b/sys/nfsserver/nfs_srvcache.c index 7873ea2..a116414 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); } /* |
