mirror/freebsd
1
0
Fork 0
mirror of https://git.FreeBSD.org/src.git synced 2024-12-21 11:13:30 +00:00
Code Issues Releases Activity

Do not collapse objects with OBJ_NOSPLIT backing swap object.

Browse Source 
NOSPLIT swap objects are not anonymous, they are used by tmpfs regular
files and POSIX shared memory.  For such objects, collapse is not
permitted.

Reported by:	mjg
Reviewed by:	markj, trasz
Tested by:	mjg, pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D19923
This commit is contained in:
Konstantin Belousov 2019-05-05 11:06:19 +00:00
parent 2d6b8546b7
commit 7f1446052f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=347150
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
sys/vm/vm_object.c
View File

@ -1748,7 +1748,8 @@ vm_object_collapse(vm_object_t object)
VM_OBJECT_WLOCK(backing_object); VM_OBJECT_WLOCK(backing_object);
if (backing_object->handle != NULL || if (backing_object->handle != NULL ||
(backing_object->type != OBJT_DEFAULT && (backing_object->type != OBJT_DEFAULT &&
backing_object->type != OBJT_SWAP) || (backing_object->type != OBJT_SWAP ||
(backing_object->flags & OBJ_NOSPLIT) != 0)) ||
(backing_object->flags & OBJ_DEAD) || (backing_object->flags & OBJ_DEAD) ||
object->handle != NULL || object->handle != NULL ||
(object->type != OBJT_DEFAULT && (object->type != OBJT_DEFAULT &&