On 3/19/18 8:45 AM, Tejun Heo wrote:
> Hello,
>
> On Thu, Mar 15, 2018 at 09:18:55AM +0800, Joseph Qi wrote:
>>> This is pure bike-shedding but offlined reads kinda weird to me, maybe
>>> just offline would read better? Other than that,
>>>
>> Do I need to resend a new version for this?
>
> No
Hello,
On Thu, Mar 15, 2018 at 09:18:55AM +0800, Joseph Qi wrote:
> > This is pure bike-shedding but offlined reads kinda weird to me, maybe
> > just offline would read better? Other than that,
> >
> Do I need to resend a new version for this?
No idea, Jens's call. He can fix it up if he
Hello Tejun,
Thanks for your quick response.
On 18/3/14 22:09, Tejun Heo wrote:
> Hello,
>
> On Wed, Mar 14, 2018 at 02:18:04PM +0800, Joseph Qi wrote:
>> Fixes: ae1188963611 ("blkcg: consolidate blkg creation in
>> blkcg_bio_issue_check()")
>> Reported-by: Jiufei Xue
Hello,
On Wed, Mar 14, 2018 at 02:18:04PM +0800, Joseph Qi wrote:
> Fixes: ae1188963611 ("blkcg: consolidate blkg creation in
> blkcg_bio_issue_check()")
> Reported-by: Jiufei Xue
> Cc: sta...@vger.kernel.org #4.3+
I'm a bit nervous about tagging it for -stable.
We've triggered a WARNING in blk_throtl_bio() when throttling writeback
io, which complains blkg->refcnt is already 0 when calling blkg_get(),
and then kernel crashes with invalid page request.
After investigating this issue, we've found it is caused by a race
between blkcg_bio_issue_check() and