Author: markj
Date: Fri Feb 3 01:16:54 2017
New Revision: 313125
URL: https://svnweb.freebsd.org/changeset/base/313125
Log:
MFC r309200:
Launder VPO_NOSYNC pages upon vnode deactivation.
Modified:
stable/11/lib/libc/sys/mmap.2
stable/11/sys/kern/vfs_subr.c
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/lib/libc/sys/mmap.2
==============================================================================
--- stable/11/lib/libc/sys/mmap.2 Fri Feb 3 01:15:31 2017
(r313124)
+++ stable/11/lib/libc/sys/mmap.2 Fri Feb 3 01:16:54 2017
(r313125)
@@ -28,7 +28,7 @@
.\" @(#)mmap.2 8.4 (Berkeley) 5/11/95
.\" $FreeBSD$
.\"
-.Dd February 18, 2015
+.Dd November 25, 2016
.Dt MMAP 2
.Os
.Sh NAME
@@ -189,6 +189,8 @@ this option any VM pages you dirty may b
(every 30-60 seconds usually) which can create performance problems if you
do not need that to occur (such as when you are using shared file-backed
mmap regions for IPC purposes).
+Dirty data will be flushed automatically when all mappings of an object are
+removed and all descriptors referencing the object are closed.
Note that VM/file system coherency is
maintained whether you use
.Dv MAP_NOSYNC
Modified: stable/11/sys/kern/vfs_subr.c
==============================================================================
--- stable/11/sys/kern/vfs_subr.c Fri Feb 3 01:15:31 2017
(r313124)
+++ stable/11/sys/kern/vfs_subr.c Fri Feb 3 01:16:54 2017
(r313125)
@@ -2948,7 +2948,7 @@ vinactive(struct vnode *vp, struct threa
obj = vp->v_object;
if (obj != NULL && (obj->flags & OBJ_MIGHTBEDIRTY) != 0) {
VM_OBJECT_WLOCK(obj);
- vm_object_page_clean(obj, 0, 0, OBJPC_NOSYNC);
+ vm_object_page_clean(obj, 0, 0, 0);
VM_OBJECT_WUNLOCK(obj);
}
VOP_INACTIVE(vp, td);
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