linux-kernel - Re: [PATCH v3] TLB flush optimization

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: <1336489319.16236.43.camel@twins>
Date:	Tue, 08 May 2012 17:01:59 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Alex Shi <alex.shi@...el.com>
Cc:	mgorman@...e.de, npiggin@...il.com, tglx@...utronix.de,
	mingo@...hat.com, hpa@...or.com, arnd@...db.de,
	rostedt@...dmis.org, fweisbec@...il.com, jeremy@...p.org,
	gregkh@...uxfoundation.org, glommer@...hat.com, riel@...hat.com,
	luto@....edu, avi@...hat.com, len.brown@...el.com,
	dhowells@...hat.com, fenghua.yu@...el.com, borislav.petkov@....com,
	yinghai@...nel.org, ak@...ux.intel.com, cpw@....com,
	steiner@....com, akpm@...ux-foundation.org, penberg@...nel.org,
	hughd@...gle.com, rientjes@...gle.com,
	kosaki.motohiro@...fujitsu.com, n-horiguchi@...jp.nec.com,
	paul.gortmaker@...driver.com, trenn@...e.de, tj@...nel.org,
	oleg@...hat.com, axboe@...nel.dk, kamezawa.hiroyu@...fujitsu.com,
	viro@...iv.linux.org.uk, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] TLB flush optimization

On Tue, 2012-05-08 at 22:03 +0800, Alex Shi wrote:
> This version just added 2 patches, the 6th and 7th. The first 5 patches are 
> same as v2.
> 
> Seems it is a little hard for me to find a real case to show performance gain.
> But the advantage is there ture.
> 
> Any comments are appreciated!
> 
> Alex
> 
> [PATCH v3 1/7] x86/tlb_info: get last level TLB entry number of CPU
> [PATCH v3 2/7] x86/flush_tlb: try flush_tlb_single one by one in
> [PATCH v3 3/7] x86/tlb: fall back to flush all when meet a THP large
> [PATCH v3 4/7] x86/tlb: add tlb flush all factor for specific CPUs
> [PATCH v3 5/7] x86/tlb: remove comments for tlb_flush_range
> [PATCH v3 6/7] x86/tlb: optimizing flush_tlb_mm
> [PATCH v3 7/7] x86/tlb: add tlb_flushall_factor into sysfs for user

Have you tried what happens if you get rid of the funny multi-vector-ipi
scheme and use the generic smp_call functions?
--
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/