linux-kernel - Re: [PATCH v3 3/3] debugobjects: Reduce contention on pool lock in fill

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Message-ID: <ff651fc5-9a5b-0260-6e24-c4e0fa8330c6@huawei.com>
Date: Wed, 25 Sep 2024 10:03:25 +0800
From: "Leizhen (ThunderTown)" <thunder.leizhen@...wei.com>
To: Thomas Gleixner <tglx@...utronix.de>, Andrew Morton
	<akpm@...ux-foundation.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 3/3] debugobjects: Reduce contention on pool lock in
 fill_pool()



On 2024/9/17 20:19, Thomas Gleixner wrote:
> On Wed, Sep 11 2024 at 17:04, Leizhen wrote:
>> On 2024/9/11 16:35, Zhen Lei wrote:
>>> Scenarios that use allocated node filling can also be applied lockless
>>> mechanisms, but slightly different. The global list obj_to_free can only
>>> be operated exclusively by one core, while kmem_cache_zalloc() can be
>>> invoked by multiple cores simultaneously. Use atomic counting to mark how
>>> many cores are filling, to reduce atomic write conflicts during check. In
>>> principle, only the first comer is allowed to fill, but there is a very
>>> low probability that multiple comers may fill at the time.
>>>
>>> Suggested-by: Thomas Gleixner <tglx@...utronix.de>
>>> Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>
>>
>> Hi, Thomas:
>>   I was going to mark "Signed-off-by" as you. Because except for the
>> following line of changes, you wrote everything. But you're maintainer.
>> It doesn't seem good if I post a patch with your Signed-off-by. Please
>> feel free to change it, but do not forget to add "Reported-by" or
>> "Tested-by" for me.
> 
> Suggested-by is fine. I look at it after back from travel and
> conferencing.

Thank you very much. You're such a gentleman.

> 
> Thanks,
> 
>         tglx
> .
> 

-- 
Regards,
  Zhen Lei