diff options
| -rw-r--r-- | share/man/man9/Makefile | 3 | ||||
| -rw-r--r-- | share/man/man9/vhold.9 | 26 |
2 files changed, 24 insertions, 5 deletions
diff --git a/share/man/man9/Makefile b/share/man/man9/Makefile index 1e2c44d91f09..3830076a1afd 100644 --- a/share/man/man9/Makefile +++ b/share/man/man9/Makefile @@ -1182,7 +1182,8 @@ MLINKS+=vfs_getopt.9 vfs_getopts.9 \ vfs_getopt.9 vfs_filteropt.9 MLINKS+=VFS_LOCK_GIANT.9 VFS_UNLOCK_GIANT.9 MLINKS+=vgone.9 vgonel.9 -MLINKS+=vhold.9 vdrop.9 +MLINKS+=vhold.9 vdrop.9 \ + vhold.9 vdropl.9 MLINKS+=vm_map_lock.9 vm_map_lock_downgrade.9 \ vm_map_lock.9 vm_map_lock_read.9 \ vm_map_lock.9 vm_map_lock_upgrade.9 \ diff --git a/share/man/man9/vhold.9 b/share/man/man9/vhold.9 index e2f985cfe7e8..6eafd3fc3db5 100644 --- a/share/man/man9/vhold.9 +++ b/share/man/man9/vhold.9 @@ -26,11 +26,11 @@ .\" .\" $FreeBSD$ .\" -.Dd November 21, 2001 +.Dd April 1, 2007 .Dt VHOLD 9 .Os .Sh NAME -.Nm vhold , vdrop +.Nm vhold , vdrop , vdropl .Nd "acquire/release a hold on a vnode" .Sh SYNOPSIS .In sys/param.h @@ -39,6 +39,8 @@ .Fn vhold "struct vnode *vp" .Ft void .Fn vdrop "struct vnode *vp" +.Ft void +.Fn vdropl "struct vnode *vp" .Sh DESCRIPTION The .Fn vhold @@ -50,13 +52,29 @@ it will be removed. .Pp The .Fn vdrop -function decrements the +and +.Fn vdropl +functions decrement the .Va v_holdcnt of the vnode. If the holdcount is less than or equal to zero prior to calling -.Fn vdrop , +.Fn vdrop +or +.Fn vdropl , the system will panic. If the vnode is no longer referenced, it will be freed. +.Pp +The difference between +.Fn vdrop +and +.Fn vdropl +is that +.Fn vdrop +locks the vnode interlock and then calls +.Fn vdropl +while +.Fn vdropl +expects the interlock to already be locked. .Sh SEE ALSO .Xr vbusy 9 , .Xr vfree 9 |