diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2013-07-08 16:00:08 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-09 10:33:22 -0700 |
| commit | 59d3132f8abdc18301898febf205d00db5f0458c (patch) | |
| tree | f780fd6c6883edfbcdf2101e74941265d8e8a18b | |
| parent | 345606d42971fc4ed164fbabac118708d51b8e0a (diff) | |
vfree: don't schedule free_work() if llist_add() returns false
vfree() only needs schedule_work(&p->wq) if p->list was empty, otherwise
vfree_deferred->wq is already pending or it is running and didn't do
llist_del_all() yet.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/vmalloc.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 318c5007f226..a649186669a3 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -1477,7 +1477,6 @@ static void __vunmap(const void *addr, int deallocate_pages) * conventions for vfree() arch-depenedent would be a really bad idea) * * NOTE: assumes that the object at *addr has a size >= sizeof(llist_node) - * */ void vfree(const void *addr) { @@ -1489,8 +1488,8 @@ void vfree(const void *addr) return; if (unlikely(in_interrupt())) { struct vfree_deferred *p = &__get_cpu_var(vfree_deferred); - llist_add((struct llist_node *)addr, &p->list); - schedule_work(&p->wq); + if (llist_add((struct llist_node *)addr, &p->list)) + schedule_work(&p->wq); } else __vunmap(addr, 1); } |