linux-kernel - Re: [mm/page_owner] 866b485262: invoked_oom-killer:gfp

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Date:   Thu, 29 Jul 2021 11:46:11 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     kernel test robot <oliver.sang@...el.com>
Cc:     Georgi Djakov <georgi.djakov@...aro.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org,
        lkp@...el.com
Subject: Re: [mm/page_owner]  866b485262: invoked_oom-killer:gfp_mask=0x

On Thu, 29 Jul 2021 09:40:19 +0800 kernel test robot <oliver.sang@...el.com> wrote:

> 
> 
> Greeting,
> 
> FYI, we noticed the following commit (built with gcc-9):
> 
> commit: 866b485262173a2b873386162b2ddcfbcb542b4a ("mm/page_owner: record the timestamp of all pages during free")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

I don't see how this can happen unless it's a side-effect of making
struct page_owner 8 bytes larger.  Does setting
/proc/sys/vm/oom_dump_tasks tell us more?