linux-kernel - Re: [PATCH 4/5] x86: mm: Change tlb_flushall

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <52CEFF97.6000709@redhat.com>
Date:	Thu, 09 Jan 2014 14:59:19 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Mel Gorman <mgorman@...e.de>, Alex Shi <alex.shi@...aro.org>,
	Ingo Molnar <mingo@...nel.org>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Fengguang Wu <fengguang.wu@...el.com>,
	H Peter Anvin <hpa@...or.com>, Linux-X86 <x86@...nel.org>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/5] x86: mm: Change tlb_flushall_shift for IvyBridge

On 01/09/2014 09:34 AM, Mel Gorman wrote:
> There was a large performance regression that was bisected to commit 611ae8e3
> (x86/tlb: enable tlb flush range support for x86). This patch simply changes
> the default balance point between a local and global flush for IvyBridge.
>
> In the interest of allowing the tests to be reproduced, this patch was
> tested using mmtests 0.15 with the following configurations
>
> 	configs/config-global-dhp__tlbflush-performance
> 	configs/config-global-dhp__scheduler-performance
> 	configs/config-global-dhp__network-performance


> Based on these results, changing the default for Ivybridge seems
> like a logical choice.
>
> Signed-off-by: Mel Gorman <mgorman@...e.de>
> Reviewed-by: Alex Shi <alex.shi@...aro.org>

Reviewed-by: Rik van Riel <riel@...hat.com>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/