Re: [PATCH] mm,page_alloc: Serialize warn_alloc() if schedulable.

From: Cong Wang <xiyou.wangcong@gmail.com>
To: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: Michal Hocko <mhocko@suse.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-mm@kvack.org, dave.hansen@intel.com,
	Johannes Weiner <hannes@cmpxchg.org>,
	Mel Gorman <mgorman@suse.de>,
	vbabka@suse.cz
Subject: Re: [PATCH] mm,page_alloc: Serialize warn_alloc() if schedulable.
Date: Mon, 5 Jun 2017 11:25:24 -0700	[thread overview]
Message-ID: <CAM_iQpV61uNwfhK_UKJQQteuzk-6m-2dHTfgFriRWunrN+m=ZQ@mail.gmail.com> (raw)
In-Reply-To: <201706041758.DGG86904.SOOVLtMJFOQFFH@I-love.SAKURA.ne.jp>

On Sun, Jun 4, 2017 at 1:58 AM, Tetsuo Handa
<penguin-kernel@i-love.sakura.ne.jp> wrote:
> You can retry with my kmallocwd patch shown bottom. An example output is
> at http://I-love.SAKURA.ne.jp/tmp/sample-serial.log .
>
> Of course, kmallocwd can gather only basic information. You might need to
> gather more information by e.g. enabling tracepoints after analyzing basic
> information.

Sure, since it is a debugging patch we definitely can try it.

> Since you said
>
>   The log I sent is partial, but that is already all what we captured,
>   I can't find more in kern.log due to log rotation.
>
> you meant "the log I captured is an incomplete one", don't you?

Right, sorry for my stupid typo.

>
> Below is kmallocwd patch backpoated for 4.9.30 kernel from
> http://lkml.kernel.org/r/1495331504-12480-1-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp .
> Documentation/malloc-watchdog.txt part is stripped in order to reduce lines.

Will do. But can't guarantee that we can reproduce it. ;)

Thanks a lot!

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