linux-kernel - Re: [RFC PATCH v3 0/9] fsdax: introduce fs query to support reflink

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Date:   Fri, 8 Jan 2021 10:14:58 -0800
From:   Jane Chu <jane.chu@...cle.com>
To:     Ruan Shiyang <ruansy.fnst@...fujitsu.com>,
        "Darrick J. Wong" <darrick.wong@...cle.com>
Cc:     linux-kernel@...r.kernel.org, linux-xfs@...r.kernel.org,
        linux-nvdimm@...ts.01.org, linux-mm@...ck.org,
        linux-fsdevel@...r.kernel.org, linux-raid@...r.kernel.org,
        dan.j.williams@...el.com, david@...morbit.com, hch@....de,
        song@...nel.org, rgoldwyn@...e.de, qi.fuli@...itsu.com,
        y-goto@...itsu.com
Subject: Re: [RFC PATCH v3 0/9] fsdax: introduce fs query to support reflink

Hi, Shiyang,

On 12/18/2020 1:13 AM, Ruan Shiyang wrote:
>>>>
>>>> So I tried the patchset with pmem error injection, the SIGBUS payload
>>>> does not look right -
>>>>
>>>> ** SIGBUS(7): **
>>>> ** si_addr(0x(nil)), si_lsb(0xC), si_code(0x4, BUS_MCEERR_AR) **
>>>>
>>>> I expect the payload looks like
>>>>
>>>> ** si_addr(0x7f3672e00000), si_lsb(0x15), si_code(0x4, 
>>>> BUS_MCEERR_AR) **
>>>
>>> Thanks for testing.  I test the SIGBUS by writing a program which calls
>>> madvise(... ,MADV_HWPOISON) to inject memory-failure.  It just shows 
>>> that
>>> the program is killed by SIGBUS.  I cannot get any detail from it.  So,
>>> could you please show me the right way(test tools) to test it?
>>
>> I'm assuming that Jane is using a program that calls sigaction to
>> install a SIGBUS handler, and dumps the entire siginfo_t structure
>> whenever it receives one...

Yes, thanks Darrick.

> 
> OK.  Let me try it and figure out what's wrong in it.

I injected poison via "ndctl inject-error",  not expecting it made any 
difference though.

Any luck?

thanks,
-jane