linux-kernel - Re: [CRIU] [PATCH] Add VDSO time function support for x86 32-bit kernel

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Date:	Fri, 14 Dec 2012 14:27:08 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Cyrill Gorcunov <gorcunov@...nvz.org>
CC:	Andy Lutomirski <luto@...capital.net>, aarcange@...hat.com,
	ak@...ux.intel.com, Pavel Emelyanov <xemul@...allels.com>,
	Stefani Seibold <stefani@...bold.net>, x86@...nel.org,
	linux-kernel@...r.kernel.org, criu@...nvz.org, mingo@...hat.com,
	john.stultz@...aro.org, tglx@...utronix.de
Subject: Re: [CRIU] [PATCH] Add VDSO time function support for x86 32-bit
 kernel

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.

	-hpa


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