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| author | kib <kib@FreeBSD.org> | 2014-12-12 09:22:52 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2014-12-12 09:22:52 +0000 |
| commit | 8b3b3c8447148612e541ae4184534ac77184e978 (patch) | |
| tree | c5a15aef44d83373673a0bcec372e9a492006337 /sys/vm | |
| parent | 722ac120b496ab6abe5ab580138f143f12092785 (diff) | |
| download | FreeBSD-src-8b3b3c8447148612e541ae4184534ac77184e978.zip FreeBSD-src-8b3b3c8447148612e541ae4184534ac77184e978.tar.gz | |
MFC r275513:
When the last reference on the vnode' vm object is dropped, read the
vp->v_vflag without taking vnode lock and without bypass.
Diffstat (limited to 'sys/vm')
| -rw-r--r-- | sys/vm/vm_object.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sys/vm/vm_object.c b/sys/vm/vm_object.c index 94c3d30..40fcad6 100644 --- a/sys/vm/vm_object.c +++ b/sys/vm/vm_object.c @@ -468,7 +468,12 @@ vm_object_vndeallocate(vm_object_t object) } #endif - if (object->ref_count > 1) { + /* + * The test for text of vp vnode does not need a bypass to + * reach right VV_TEXT there, since it is obtained from + * object->handle. + */ + if (object->ref_count > 1 || (vp->v_vflag & VV_TEXT) == 0) { object->ref_count--; VM_OBJECT_WUNLOCK(object); /* vrele may need the vnode lock. */ |
