diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2013-07-08 16:00:08 -0700 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2019-05-02 21:06:10 +0200 |
| commit | a558e665f41afd80680ecd704b37f381389c488f (patch) | |
| tree | 6d39a782025fe8478862744112078563970646f6 /mm | |
| parent | b97c37901526d03a400714891946cb056a7993be (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>
Change-Id: Ife3fdbd35dd7e4ba73ae6d59398642bbdc91e2b0
(cherry picked from commit b1d9d5877ac1da2670a768a15ff740a632f100c3)
Diffstat (limited to 'mm')
| -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 1870b1f7b..779998a9e 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -1514,7 +1514,6 @@ 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) { @@ -1526,8 +1525,8 @@ void vfree(const void *addr) return; if (unlikely(in_interrupt())) { struct vfree_deferred *p = this_cpu_ptr(&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); } |