From: Cyrill Gorcunov <gorcunov@openvz.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andy Lutomirski <luto@amacapital.net>,
aarcange@redhat.com, ak@linux.intel.com,
Pavel Emelyanov <xemul@parallels.com>,
Stefani Seibold <stefani@seibold.net>,
x86@kernel.org, linux-kernel@vger.kernel.org, criu@openvz.org,
mingo@redhat.com, john.stultz@linaro.org, tglx@linutronix.de
Subject: Re: [CRIU] [PATCH] Add VDSO time function support for x86 32-bit kernel
Date: Sat, 15 Dec 2012 02:43:07 +0400 [thread overview]
Message-ID: <20121214224307.GH6582@moon> (raw)
In-Reply-To: <50CBA7BC.4020001@zytor.com>
On Fri, Dec 14, 2012 at 02:27:08PM -0800, H. Peter Anvin wrote:
> On 12/14/2012 02:25 PM, Cyrill Gorcunov wrote:
> >
> > this would allow us to defer checkpoint until task finish vdso code. Peter,
> > if I understand you correctly you propose we provide some own proxy-vdso
> > which would redirect calls to real ones, right? But the main problem
> > is that is exactly the idea to be able to c/r existing programs without
> > recompiling and such (or I miss something here?).
>
> No, I'm proposing that you use a proxy-vdso which does nothing but
> system calls, and therefore can be stable indefinitely.
This won't help in case of scenario you've been pointing in
previous email (where c/r happens in a middle of vdso),
would it? Because we still need somehow to be sure we're not
checkpointing in a middle of signal handler which will return
to some vdso place.
next prev parent reply other threads:[~2012-12-14 22:43 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-12 20:19 [PATCH] Add VDSO time function support for x86 32-bit kernel stefani
2012-12-12 23:34 ` H. Peter Anvin
2012-12-13 5:53 ` Stefani Seibold
2012-12-13 6:10 ` H. Peter Anvin
2012-12-13 6:14 ` H. Peter Anvin
2012-12-13 6:17 ` Stefani Seibold
2012-12-13 6:47 ` H. Peter Anvin
2012-12-13 7:17 ` Stefani Seibold
2012-12-13 19:32 ` Andy Lutomirski
2012-12-14 0:09 ` H. Peter Anvin
2012-12-14 0:20 ` Andy Lutomirski
2012-12-14 0:36 ` H. Peter Anvin
2012-12-14 1:32 ` H. Peter Anvin
2012-12-14 1:42 ` Andy Lutomirski
2012-12-14 1:49 ` H. Peter Anvin
2012-12-14 2:11 ` Andy Lutomirski
2012-12-14 2:18 ` H. Peter Anvin
2012-12-14 2:20 ` Andy Lutomirski
2012-12-14 8:34 ` [CRIU] " Pavel Emelyanov
2012-12-14 18:35 ` H. Peter Anvin
2012-12-14 18:44 ` Andy Lutomirski
2012-12-14 18:47 ` H. Peter Anvin
2012-12-14 20:12 ` Cyrill Gorcunov
2012-12-14 21:08 ` H. Peter Anvin
2012-12-14 21:20 ` Cyrill Gorcunov
2012-12-14 21:21 ` H. Peter Anvin
2012-12-14 21:27 ` Andy Lutomirski
2012-12-14 22:00 ` H. Peter Anvin
2012-12-14 22:25 ` Cyrill Gorcunov
2012-12-14 22:27 ` H. Peter Anvin
2012-12-14 22:43 ` Cyrill Gorcunov [this message]
2012-12-14 22:48 ` H. Peter Anvin
2012-12-14 23:48 ` John Stultz
2012-12-14 23:55 ` H. Peter Anvin
2012-12-17 9:05 ` Pavel Emelyanov
[not found] ` <fb2e871b-3e2a-4e96-9eb9-cb2dd4f66eaa@email.android! .com>
2012-12-17 15:21 ` H. Peter Anvin
2012-12-17 18:56 ` Pavel Emelyanov
2012-12-17 18:57 ` H. Peter Anvin
2012-12-14 22:46 ` H. Peter Anvin
2012-12-14 23:09 ` Stefani Seibold
2012-12-14 23:29 ` H. Peter Anvin
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