linux-kernel - Re: [PATCH 4/5] x86: entry_64.S: always allocate complete "struct pt

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Message-ID: <53DBDDE1.5070805@zytor.com>
Date:	Fri, 01 Aug 2014 11:35:13 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Denys Vlasenko <dvlasenk@...hat.com>, linux-kernel@...r.kernel.org
CC:	Oleg Nesterov <oleg@...hat.com>,
	Andy Lutomirski <luto@...capital.net>,
	Frederic Weisbecker <fweisbec@...il.com>,
	X86 ML <x86@...nel.org>, Alexei Starovoitov <ast@...mgrid.com>,
	Will Drewry <wad@...omium.org>,
	Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH 4/5] x86: entry_64.S: always allocate complete "struct
 pt_regs"

On 08/01/2014 07:48 AM, Denys Vlasenko wrote:
> 
> Patch was run-tested: 64-bit executables, 32-bit executables,
> strace works.
> 

Could you please try to see if there is a measurable change in the
latency of a trivial syscall?

	-hpa


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