On 10/10/2017 01:05 PM, Shaohua Li wrote:
> On Tue, Oct 10, 2017 at 12:48:38PM -0600, Jens Axboe wrote:
>> On 10/10/2017 12:13 PM, Shaohua Li wrote:
>>> On Tue, Oct 10, 2017 at 11:13:32AM +0800, xuejiufei wrote:
From: Jiufei Xue
A null pointer dereference can occur when blkcg is rem
On Tue, Oct 10, 2017 at 12:48:38PM -0600, Jens Axboe wrote:
> On 10/10/2017 12:13 PM, Shaohua Li wrote:
> > On Tue, Oct 10, 2017 at 11:13:32AM +0800, xuejiufei wrote:
> >> From: Jiufei Xue
> >>
> >> A null pointer dereference can occur when blkcg is removed manually
> >> with writeback IOs infligh
On 10/10/2017 12:13 PM, Shaohua Li wrote:
> On Tue, Oct 10, 2017 at 11:13:32AM +0800, xuejiufei wrote:
>> From: Jiufei Xue
>>
>> A null pointer dereference can occur when blkcg is removed manually
>> with writeback IOs inflight. This is caused by the following case:
>>
>> Writeback kworker submit
On Tue, Oct 10, 2017 at 11:13:32AM +0800, xuejiufei wrote:
> From: Jiufei Xue
>
> A null pointer dereference can occur when blkcg is removed manually
> with writeback IOs inflight. This is caused by the following case:
>
> Writeback kworker submit the bio and set bio->bi_cg_private to tg
> in bl
From: Jiufei Xue
A null pointer dereference can occur when blkcg is removed manually
with writeback IOs inflight. This is caused by the following case:
Writeback kworker submit the bio and set bio->bi_cg_private to tg
in blk_throtl_assoc_bio.
Then we remove the block cgroup manually, the blkg an
