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From:   Ivan Babrou <ivan@cloudflare.com>
Date:   Fri, 11 Mar 2022 14:36:51 -0800
Message-ID: <CABWYdi3iJ45pSgj-OrxATVXR7-MHb3DZ-UkERPvo9L=h_qtzgA@mail.gmail.com>
Subject: Re: zram corruption due to uninitialized do_swap_page fault
To:     Yu Zhao <yuzhao@google.com>
Cc:     Linux MM <linux-mm@kvack.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Minchan Kim <minchan@kernel.org>,
        Nitin Gupta <ngupta@vflare.org>,
        Sergey Senozhatsky <senozhatsky@chromium.org>,
        Jens Axboe <axboe@kernel.dk>, linux-block@vger.kernel.org
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On Fri, Mar 11, 2022 at 2:30 PM Yu Zhao <yuzhao@google.com> wrote:
>
> On Fri, Mar 11, 2022 at 12:52 PM Ivan Babrou <ivan@cloudflare.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.