linux-kernel - Re: [patch] x86_32: use 8 IPI vectors for tlb flush (as x86

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Date:	Tue, 3 Feb 2009 06:45:59 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Frederik Deweerdt <frederik.deweerdt@...og.eu>,
	Tejun Heo <tj@...nel.org>
Cc:	tglx@...utronix.de, ak@...ux.intel.com, hpa@...or.com,
	linux-kernel@...r.kernel.org
Subject: Re: [patch] x86_32: use 8 IPI vectors for tlb flush (as x86_64)


* Frederik Deweerdt <frederik.deweerdt@...og.eu> wrote:

> Hi,
> 
> The following patch allows using 8 different IPI vectors on ia32 for tlb
> flushes, this reduces the contention on the tlbstate_lock. It also makes
> the 32 bits version closer to the 64 bits version.

This was done recently :-(

Are you	aware of the x86 development tree? It's included in the -tip tree 
and can be found at:

  http://people.redhat.com/mingo/tip.git/README

Credit goes to Tejun Heo who unified the 32-bit and 64-bit TLB code (which 
also means 32-bit uses the 8 IPI vectors) - the code is now all in 
arch/x86/mm/tlb.c.

	Ingo
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