linux-kernel - Re: [mm] c566586818: BUG:kernel_hang_in_early-boot_stage,last_printk:Probing_EDD(edd=off_to

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Date:   Thu, 27 Aug 2020 17:16:47 +0800
From:   Rong Chen <rong.a.chen@...el.com>
To:     Catalin Marinas <catalin.marinas@....com>, Qian Cai <cai@....pw>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Matthew Wilcox <willy@...radead.org>,
        Michal Hocko <mhocko@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org
Subject: Re: [mm] c566586818:
 BUG:kernel_hang_in_early-boot_stage,last_printk:Probing_EDD(edd=off_to_disable)...ok



On 8/27/20 1:30 AM, Catalin Marinas wrote:
> On Tue, Aug 25, 2020 at 11:02:40PM -0400, Qian Cai wrote:
>> On Aug 25, 2020, at 8:44 PM, Rong Chen <rong.a.chen@...el.com> wrote:
>>> I rebuilt the kernel on commit c566586818 but the error changed to
>>> "RIP: 0010:clear_page_orig+0x12/0x40", and the error can be
>>> reproduced on parent commit:
>> Catalin, any thought? Sounds like those early kmemleak allocations
>> cause some sort of memory corruption?
> I can't immediately see how but Rong implies that the error also happens
> on the parent commit. Does it mean the bisection isn't entirely right?
>

Hi Catalin,

The original bisection is for "BUG:kernel_hang_in_early-boot_stage" 
which locate to commit c566586818,
and the boot will go on and meet the error "RIP: 
0010:clear_page_orig+0x12/0x40" if we set
CONFIG_DEBUG_KMEMLEAK_MEM_POOL_SIZE=400, but the error shouldn't cause 
by commit c566586818
because we can reproduce the error on parent commit.

Best Regards,
Rong Chen