linux-kernel - Re: [PATCH v4 3/7] x86/flush_tlb: try flush_tlb_single one by one in flush_tlb

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Message-ID: <1337083243.27020.153.camel@laptop>
Date:	Tue, 15 May 2012 14:00:43 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Borislav Petkov <bp@...64.org>
Cc:	Alex Shi <alex.shi@...el.com>, rob@...dley.net, tglx@...utronix.de,
	mingo@...hat.com, hpa@...or.com, arnd@...db.de,
	rostedt@...dmis.org, fweisbec@...il.com, jeremy@...p.org,
	gregkh@...uxfoundation.org, riel@...hat.com, luto@....edu,
	avi@...hat.com, len.brown@...el.com, dhowells@...hat.com,
	fenghua.yu@...el.com, 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 v4 3/7] x86/flush_tlb: try flush_tlb_single one by one
 in flush_tlb_range

On Tue, 2012-05-15 at 13:56 +0200, Borislav Petkov wrote:
> On Tue, May 15, 2012 at 01:16:22PM +0200, Peter Zijlstra wrote:
> > Wouldn't all this become much prettier if you rip out that
> > multi-vector stuff?
> 
> multi-vector stuff? Please elaborate.

The INVALIDATE_TLB_VECTOR muck:

                apic->send_IPI_mask(to_cpumask(f->flush_cpumask),
                              INVALIDATE_TLB_VECTOR_START + sender);

and simply use:

 smp_call_function()

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