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

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] [day] [month] [year] [list]

Message-ID: <20090203054559.GA20154@elte.hu>
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
--
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/