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From:   Jack Wang <jack.wang.usish@gmail.com>
Date:   Fri, 9 Nov 2018 16:44:12 +0100
Message-ID: <CA+res+QuZKrWN=CPafoxF+nB1HaDygbcoiDcY3-Q=EkwBXedfw@mail.gmail.com>
Subject: Re: BUG: aio/direct-io data corruption in 4.7
To:     shapiro.gregory@gmail.com
Cc:     hch@infradead.org, jnicklin@blockbridge.com,
        linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
        gregory.shapiro@kaminario.com
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Gregory Shapiro <shapiro.gregory@gmail.com> =E4=BA=8E2018=E5=B9=B411=E6=9C=
=886=E6=97=A5=E5=91=A8=E4=BA=8C =E4=B8=8B=E5=8D=8812:31=E5=86=99=E9=81=93=
=EF=BC=9A
>
> Hi Jack,
> I tested it in 4.9.102 and I checked the latest code from elixir
> (versions 4.19 and 4.20) and the error in code is still present there.
> More on the scenario and the bug:
> I experienced data corruption in my application (nvme based storage).
> The issue was caused because of faulty hardware, but the real problem
> is I got a correct number of bytes in io_getevents thus couldn't
> recognize it correctly the error.
> Looking at the /var/log/messages and  I saw the following errors in
> time of coruption:
Thanks for the info, Gregory.

I noticed guys from Amazon pushing the fix to upstream:
https://lore.kernel.org/patchwork/patch/1008443/
I hope it will be in upstream soon.


Regards,
Jack Wang