linux-kernel - Re: [PATCH] mm: shmem: do not call PageHWPoison on a ERR-page

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Message-ID: <CAHk-=wjgZVY-skWP1vW2Cw+His+3eESATM_+QDYp=wFEsVv=qw@mail.gmail.com>
Date:   Sat, 13 Nov 2021 12:16:04 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Jens Axboe <axboe@...nel.dk>, Arnd Bergmann <arnd@...db.de>,
        Yang Shi <shy828301@...il.com>
Cc:     Ajay Garg <ajaygargnsit@...il.com>,
        Hugh Dickins <hughd@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux-MM <linux-mm@...ck.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mm: shmem: do not call PageHWPoison on a ERR-page

On Sat, Nov 13, 2021 at 9:21 AM Jens Axboe <axboe@...nel.dk> wrote:
>
> Maybe Andrew is out - Linus, if you follow this thread, there are two
> proposed fixes for this. It'd be nice to have one of them in -rc1.

Neither of the fixes were sent to me, and honestly, I think the real
issue is that the original commit is just too broken for words.

The error handling in that commit is just entirely lacking.

I've reverted the commit rather than try to fix up the breakage.

Because at some point it's just better to say "that was broken" rather
than try to fix it up. And that original commit was too broken to be
worth fixing up. It already had one fix for uninitialized variables
before it even hit my tree, and then caused problems and had obvious
broken error handling.

             Linus