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From: Arnd Bergmann <arnd@kernel.org>
To: musl@lists.openwall.com
Cc: Rich Felker <dalias@libc.org>, Markus Wichmann <nullplan@gmx.net>,
	 Florian Weimer <fweimer@redhat.com>
Subject: Re: [musl] Backwards kernel compatibility
Date: Wed, 9 Jun 2021 09:03:12 +0200	[thread overview]
Message-ID: <CAK8P3a1tsoaX8mhDXnYoXexbu9pF3Fw107RTYey0zrHGg5+zBQ@mail.gmail.com> (raw)
In-Reply-To: <CAK8P3a2MDvXCQGbjcUiXZko8yWgn+r1Gc0G6ajYG08m41ibY8g@mail.gmail.com>

On Wed, Jun 2, 2021 at 1:52 PM Arnd Bergmann <arnd@kernel.org> wrote:
> On Wed, Jun 2, 2021 at 9:38 AM Martin Vajnar <martin.vajnar@gmail.com> wrote:

> >
> > The main source of overhead comes from the kernel 4.4 which on arm64
> > produces stack traces when not implemented syscall is invoked:
> >
> >     https://github.com/torvalds/linux/blob/afd2ff9b7e1b367172f18ba7f693dfb62bdcb2dc/arch/arm64/kernel/traps.c#L369
>
> That is clearly a bug that was fixed in mainline and backported to linux-4.14
> but not 4.4 or 4.9. I've sent a manual backport for inclusion in those kernels
> now.

The backport is now merged into the stable kernel trees and should be part of
4.4.272/4.9.272.

        Arnd

  parent reply	other threads:[~2021-06-09  7:05 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-10  5:50 Martin Vajnar
2021-05-10  6:46 ` Florian Weimer
2021-05-10 18:58 ` Markus Wichmann
2021-05-24 13:52   ` Martin Vajnar
2021-05-24 22:00     ` Rich Felker
2021-06-02  7:38       ` Martin Vajnar
2021-06-02 11:52         ` Arnd Bergmann
2021-06-02 14:56           ` Rich Felker
2021-06-02 16:01             ` Arnd Bergmann
2021-06-02 16:18               ` Arnd Bergmann
2021-06-09  7:03           ` Arnd Bergmann [this message]
2021-06-08 22:16       ` Martin Vajnar
2021-06-09  0:37         ` Rich Felker

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