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

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Message-ID: <20120509234512.GA27196@tassilo.jf.intel.com>
Date:	Wed, 9 May 2012 16:45:12 -0700
From:	Andi Kleen <ak@...ux.intel.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Alex Shi <alex.shi@...el.com>, 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, 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

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

Yes we did. It's much faster on larger systems.

But haven't sent the patch yet because wasn't sure if it wasn't slower
on small systems.

-Andi


-- 
ak@...ux.intel.com -- Speaking for myself only
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