Hello Vladimir and Tejun,
This patch isn't in the Linus' tree. Could you do something to push it
into the upstream tree.
Thanks,
Andrei
On Wed, Jul 5, 2017 at 7:47 AM, Tejun Heo <tj@xxxxxxxxxx> wrote:
> On Sun, Jul 02, 2017 at 09:50:17PM +0300, Vladimir Davydov wrote:
>> From: Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
>> Subject: [PATCH] slub: fix per memcg cache leak on css offline
>>
>> To avoid a possible deadlock, sysfs_slab_remove() schedules an
>> asynchronous work to delete sysfs entries corresponding to the kmem
>> cache. To ensure the cache isn't freed before the work function is
>> called, it takes a reference to the cache kobject. The reference is
>> supposed to be released by the work function. However, the work function
>> (sysfs_slab_remove_workfn()) does nothing in case the cache sysfs entry
>> has already been deleted, leaking the kobject and the corresponding
>> cache. This may happen on a per memcg cache destruction, because sysfs
>> entries of a per memcg cache are deleted on memcg offline if the cache
>> is empty (see __kmemcg_cache_deactivate()).
> ...
>> Reported-by: Andrei Vagin <avagin@xxxxxxxxx>
>> Signed-off-by: Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
>> Fixes: 3b7b314053d02 ("slub: make sysfs file removal asynchronous")
>
> Oops,
>
> Acked-by: Tejun Heo <tj@xxxxxxxxxx>
>
> Thanks.
>
> --
> tejun
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