On Fri, Apr 2, 2021 at 6:04 PM Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: > > On Wed, 31 Mar 2021 20:35:02 -0700 Roman Gushchin <guro@xxxxxx> wrote: > > > On Thu, Apr 01, 2021 at 11:31:16AM +0800, Miaohe Lin wrote: > > > On 2021/4/1 11:01, Muchun Song wrote: > > > > Christian Borntraeger reported a warning about "percpu ref > > > > (obj_cgroup_release) <= 0 (-1) after switching to atomic". > > > > Because we forgot to obtain the reference to the objcg and > > > > wrongly obtain the reference of memcg. > > > > > > > > Reported-by: Christian Borntraeger <borntraeger@xxxxxxxxxx> > > > > Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx> > > > > > > Thanks for the patch. > > > Is a Fixes tag needed? > > > > No, as the original patch hasn't been merged into the Linus's tree yet. > > So the fix can be simply squashed. > > Help. Which is "the original patch"? "mm: memcontrol: use obj_cgroup APIs to charge kmem pages"
