linux-kernel - Re: zram corruption due to uninitialized do_swap

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Message-ID: <CABWYdi3iJ45pSgj-OrxATVXR7-MHb3DZ-UkERPvo9L=h_qtzgA@mail.gmail.com>
Date:   Fri, 11 Mar 2022 14:36:51 -0800
From:   Ivan Babrou <ivan@...udflare.com>
To:     Yu Zhao <yuzhao@...gle.com>
Cc:     Linux MM <linux-mm@...ck.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Minchan Kim <minchan@...nel.org>,
        Nitin Gupta <ngupta@...are.org>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org
Subject: Re: zram corruption due to uninitialized do_swap_page fault

On Fri, Mar 11, 2022 at 2:30 PM Yu Zhao <yuzhao@...gle.com> wrote:
>
> On Fri, Mar 11, 2022 at 12:52 PM Ivan Babrou <ivan@...udflare.com> wrote:
> >
> > Hello,
> >
> > We're looking into using zram, but unfortunately we ran into some
> > corruption issues.
>
> Kernel version(s) please?

You can see 5.16 in dmesg output. I've also replicated on 5.17-rc7 and
5.15.26. The latter is the LTS version we use in production, where
coredumps and rocksdb corruptions were observed.