linux-kernel - Re: [PATCH 2/2][RT] powerpc - Make the irq reverse mapping radix tree lockless

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: <1216974440.11188.100.camel@pasglop>
Date:	Fri, 25 Jul 2008 18:27:20 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Sebastien Dugue <sebastien.dugue@...l.net>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Linux-rt <linux-rt-users@...r.kernel.org>,
	linux-ppc <linuxppc-dev@...abs.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Michael Ellerman <michael@...erman.id.au>,
	Tim Chavez <tinytim@...ibm.com>,
	Jean Pierre Dion <jean-pierre.dion@...l.net>,
	Gilles Carry <Gilles.Carry@....bull.net>
Subject: Re: [PATCH 2/2][RT] powerpc - Make the irq reverse mapping radix
	tree lockless

On Fri, 2008-07-25 at 09:49 +0200, Peter Zijlstra wrote:
> 
> 
> The only advantage of the concurrent radix tree over this model is that
> it can potentially do multiple modification operations at the same time.

Yup, we do not need that for the irq revmap... concurrent lookup is all we need.

Cheers,
Ben.


--
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/