From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: Dmitry Safonov <dima@arista.com>, linux-kernel@vger.kernel.org
Cc: Paul Mackerras <paulus@samba.org>,
Dmitry Safonov <0x7f454c46@gmail.com>,
linuxppc-dev@lists.ozlabs.org,
Laurent Dufour <ldufour@linux.ibm.com>,
stable@vger.kernel.org, Andy Lutomirski <luto@kernel.org>,
Andrei Vagin <avagin@gmail.com>
Subject: Re: [PATCH] powerpc/vdso: Separate vvar vma from vdso
Date: Mon, 19 Apr 2021 13:59:46 +1000 [thread overview]
Message-ID: <161880478605.1398509.2763333717274966533.b4-ty@ellerman.id.au> (raw)
In-Reply-To: <20210326191720.138155-1-dima@arista.com>
On Fri, 26 Mar 2021 19:17:20 +0000, Dmitry Safonov wrote:
> Since commit 511157ab641e ("powerpc/vdso: Move vdso datapage up front")
> VVAR page is in front of the VDSO area. In result it breaks CRIU
> (Checkpoint Restore In Userspace) [1], where CRIU expects that "[vdso]"
> from /proc/../maps points at ELF/vdso image, rather than at VVAR data page.
> Laurent made a patch to keep CRIU working (by reading aux vector).
> But I think it still makes sence to separate two mappings into different
> VMAs. It will also make ppc64 less "special" for userspace and as
> a side-bonus will make VVAR page un-writable by debugger (which previously
> would COW page and can be unexpected).
>
> [...]
Applied to powerpc/next.
[1/1] powerpc/vdso: Separate vvar vma from vdso
https://git.kernel.org/powerpc/c/1c4bce6753857dc409a0197342d18764e7f4b741
cheers
prev parent reply other threads:[~2021-04-19 4:05 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-26 19:17 [PATCH] powerpc/vdso: Separate vvar vma from vdso Dmitry Safonov
2021-03-27 17:19 ` Christophe Leroy
2021-03-27 17:43 ` Dmitry Safonov
2021-03-29 9:51 ` Laurent Dufour
2021-03-29 15:14 ` Laurent Dufour
2021-03-29 19:59 ` Dmitry Safonov
2021-03-30 8:41 ` Christophe Leroy
2021-03-31 9:59 ` Michael Ellerman
2021-03-31 18:53 ` Dmitry Safonov
2021-03-30 10:17 ` Christophe Leroy
2021-03-31 18:15 ` Dmitry Safonov
2021-04-19 3:59 ` Michael Ellerman [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=161880478605.1398509.2763333717274966533.b4-ty@ellerman.id.au \
--to=patch-notifications@ellerman.id.au \
--cc=0x7f454c46@gmail.com \
--cc=avagin@gmail.com \
--cc=dima@arista.com \
--cc=ldufour@linux.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=luto@kernel.org \
--cc=paulus@samba.org \
--cc=stable@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).