diff options
| author | Konstantin Belousov <kib@FreeBSD.org> | 2024-03-08 18:26:48 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2024-03-13 00:30:41 +0000 |
| commit | ea8d7263d93e3e32d8123da5f711446a37cd1722 (patch) | |
| tree | 79946f9dcd764d513fbfbf11ee65be7aa14d12d7 | |
| parent | adcb01c08e849bee32b10b214f59d6bcf8ea46ea (diff) | |
mount_nullfs(8): document -o cache and vfs.nullfs.cache_vnodes
(cherry picked from commit 4a2a69c4472cf677f8dfc026fff3dd33c83580cb)
| -rw-r--r-- | sbin/mount_nullfs/mount_nullfs.8 | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/sbin/mount_nullfs/mount_nullfs.8 b/sbin/mount_nullfs/mount_nullfs.8 index e3648a2fb2f2..b4b862b6c979 100644 --- a/sbin/mount_nullfs/mount_nullfs.8 +++ b/sbin/mount_nullfs/mount_nullfs.8 @@ -32,7 +32,7 @@ .\" .\" @(#)mount_null.8 8.6 (Berkeley) 5/1/95 .\" -.Dd June 11, 2023 +.Dd March 24, 2024 .Dt MOUNT_NULLFS 8 .Os .Sh NAME @@ -92,15 +92,21 @@ See the .Xr mount 8 man page for possible options and their meanings. Additionally the following option is supported: -.Bl -tag -width indent +.Bl -tag -width nocache .It Cm nocache Disable metadata caching in the null layer. Some lower-layer file systems may force this option. Depending on the access pattern, this may result in increased lock contention. +.It Cm cache +Force enable metadate caching. .El .El .Pp +The +.Dv vfs.nullfs.cache_vnodes +sysctl specifies global default for mount-specific cache/nocache option. +.Pp The null layer has two purposes. First, it serves as a demonstration of layering by providing a layer which does nothing. |