diff options
| -rw-r--r-- | sys/ufs/ufs/ufs_dirhash.c | 31 |
1 files changed, 26 insertions, 5 deletions
diff --git a/sys/ufs/ufs/ufs_dirhash.c b/sys/ufs/ufs/ufs_dirhash.c index 476ec38..a747334 100644 --- a/sys/ufs/ufs/ufs_dirhash.c +++ b/sys/ufs/ufs/ufs_dirhash.c @@ -85,10 +85,11 @@ SYSCTL_INT(_vfs_ufs, OID_AUTO, dirhash_docheck, CTLFLAG_RW, &ufs_dirhashcheck, static int ufs_dirhashlowmemcount = 0; SYSCTL_INT(_vfs_ufs, OID_AUTO, dirhash_lowmemcount, CTLFLAG_RD, &ufs_dirhashlowmemcount, 0, "number of times low memory hook called"); -static int ufs_dirhash_reclaimperc = 10; -SYSCTL_INT(_vfs_ufs, OID_AUTO, dirhash_reclaimperc, CTLFLAG_RW, - &ufs_dirhash_reclaimperc, 0, - "percentage of dirhash cache to be removed in low VM events"); +static int ufs_dirhashreclaimpercent = 10; +static int ufsdirhash_set_reclaimpercent(SYSCTL_HANDLER_ARGS); +SYSCTL_PROC(_vfs_ufs, OID_AUTO, dirhash_reclaimpercent, + CTLTYPE_INT | CTLFLAG_RW, 0, 0, ufsdirhash_set_reclaimpercent, "I", + "set percentage of dirhash cache to be removed in low VM events"); static int ufsdirhash_hash(struct dirhash *dh, char *name, int namelen); @@ -1251,7 +1252,7 @@ ufsdirhash_lowmem() ufs_dirhashlowmemcount++; memfreed = 0; - memwanted = ufs_dirhashmem / ufs_dirhash_reclaimperc; + memwanted = ufs_dirhashmem * ufs_dirhash_reclaimpercent / 100; DIRHASHLIST_LOCK(); @@ -1273,6 +1274,26 @@ ufsdirhash_lowmem() DIRHASHLIST_UNLOCK(); } +static int +ufsdirhash_set_reclaimpercent(SYSCTL_HANDLER_ARGS) +{ + int error, v; + + v = ufs_dirhashreclaimpercent; + error = sysctl_handle_int(oidp, &v, v, req); + if (error) + return (error); + if (req->newptr == NULL) + return (error); + if (v == ufs_dirhashreclaimpercent) + return (0); + + /* Refuse invalid percentages */ + if (v < 0 || v > 100) + return (EINVAL); + ufs_dirhashreclaimpercent = v; + return (0); +} void ufsdirhash_init() |
