Re: [PATCH block/for-3.5/core] blkcg: tg_stats_alloc_lock is an irqlock

[Jens Axboe]

On 05/23/2012 11:54 AM, Sasha Levin wrote:
> On Thu, Apr 26, 2012 at 11:10 PM, Tejun Heo <tj@xxxxxxxxxx> wrote:
>> tg_stats_alloc_lock nests inside queue lock and should always be held
>> with irq disabled.  throtl_pd_{init|exit}() were using non-irqsafe
>> spinlock ops which triggered inverse lock ordering via irq warning via
>> RCU freeing of blkg invoking throtl_pd_exit() w/o disabling IRQ.
>>
>> Update both functions to use irq safe operations.
>>
>> Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
>> Reported-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
>> LKML-Reference: <1335339396.16988.80.camel@lappy>
>> ---
> 
> I think that this patch got lost somewhere and never got merged into
> the for-3.5 branch.

Seems it did, odd. Applied it now.

-- 
Jens Axboe

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