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

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Message-ID: <7fc7ba7c-f138-4944-dcc7-ce4b3f097528@oracle.com>
Date:   Wed, 16 Dec 2020 12:55:30 -0800
From:   Jane Chu <jane.chu@...cle.com>
To:     Shiyang Ruan <ruansy.fnst@...fujitsu.com>,
        linux-kernel@...r.kernel.org, linux-xfs@...r.kernel.org,
        linux-nvdimm@...ts.01.org, linux-mm@...ck.org
Cc:     linux-fsdevel@...r.kernel.org, linux-raid@...r.kernel.org,
        darrick.wong@...cle.com, 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 12/15/2020 4:14 AM, Shiyang Ruan wrote:
> The call trace is like this:
> memory_failure()
>   pgmap->ops->memory_failure()      => pmem_pgmap_memory_failure()
>    gendisk->fops->corrupted_range() => - pmem_corrupted_range()
>                                        - md_blk_corrupted_range()
>     sb->s_ops->currupted_range()    => xfs_fs_corrupted_range()
>      xfs_rmap_query_range()
>       xfs_currupt_helper()
>        * corrupted on metadata
>            try to recover data, call xfs_force_shutdown()
>        * corrupted on file data
>            try to recover data, call mf_dax_mapping_kill_procs()
> 
> The fsdax & reflink support for XFS is not contained in this patchset.
> 
> (Rebased on v5.10)

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,
-jane