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From: Schspa Shi <schspa@gmail.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: longman@redhat.com, swboyd@chromium.org, linux@roeck-us.net,
	wuchi.zero@gmail.com, linux-kernel@vger.kernel.org,
	syzbot+5093ba19745994288b53@syzkaller.appspotmail.com
Subject: Re: [PATCH 1/2] debugobject: fix concurrency issues with is_static_object
Date: Thu, 23 Mar 2023 11:10:29 +0800	[thread overview]
Message-ID: <m2zg84nomr.fsf@gmail.com> (raw)
In-Reply-To: <87mt448p0e.ffs@tglx>


Thomas Gleixner <tglx@linutronix.de> writes:

> On Thu, Mar 23 2023 at 01:55, Schspa Shi wrote:
>> Thomas Gleixner <tglx@linutronix.de> writes:
>>> Which requirement? The is_static_object() call takes the address of the
>>> actual object and has nothing to do with the tracking object at all.
>>>
>>
>> This is for the fellowing test case, actually we calls
>> debug_object_free() from a static object in our selftest, if we don't
>> report any thing when call debug_object_free from a static object, we
>> there is no such issues.
>
> That's an artifical and completely pointless test case. As I told you
> before the memory subsystem will warn when it's tried to free a static
> object. debug_objects_free() is invoked from the memory subsystem *free*
> functions.
>
> What is the value of another warning?
>
> Nothing at all.
>
> So why would we add extra code just to keep track of something
> completely redundant?
>

OK, there is really no need to do this extra check. And should I
submit a new patch version with your change 😃?

> Thanks,
>
>         tglx


-- 
BRs
Schspa Shi

  reply	other threads:[~2023-03-23  3:16 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-03 16:19 Schspa Shi
2023-03-03 16:19 ` [PATCH 2/2] debugobject: add unit test for static debug object Schspa Shi
2023-03-23  3:16   ` Schspa Shi
2023-03-23  7:53     ` Thomas Gleixner
2023-03-23  8:44       ` Schspa Shi
2023-04-13 22:39         ` Thomas Gleixner
2023-03-03 17:00 ` [PATCH 1/2] debugobject: fix concurrency issues with is_static_object Waiman Long
2023-03-03 17:53   ` Schspa Shi
2023-03-04  0:14     ` Thomas Gleixner
2023-03-03 23:47 ` Thomas Gleixner
2023-03-22 15:40   ` Schspa Shi
2023-03-22 17:46     ` Thomas Gleixner
2023-03-22 17:55       ` Schspa Shi
2023-03-22 21:17         ` Thomas Gleixner
2023-03-23  3:10           ` Schspa Shi [this message]
2023-03-22 18:05       ` Thomas Gleixner
2023-03-22 18:18         ` Schspa Shi
2023-04-12  7:54         ` [PATCH] debugobject: Prevent init race with static objects Thomas Gleixner
2023-04-13  0:17           ` Stephen Boyd
2023-04-13 12:14             ` Thomas Gleixner
2023-05-01 13:40           ` Ido Schimmel
2023-05-01 15:42             ` Thomas Gleixner
2023-05-02  5:53               ` Ido Schimmel
2023-05-02  8:12               ` [tip: core/debugobjects] debugobject: Ensure pool refill (again) tip-bot2 for Thomas Gleixner
2023-04-15 21:20 ` [tip: core/debugobjects] debugobject: Prevent init race with static objects tip-bot2 for Thomas Gleixner

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