linux-kernel - Re: [PATCH] cpuacct: add a branch prediction

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: <20090226122623.GC23099@elte.hu>
Date:	Thu, 26 Feb 2009 13:26:23 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Bharata B Rao <bharata.rao@...il.com>,
	Li Zefan <lizf@...fujitsu.com>,
	Paul Menage <menage@...gle.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] cpuacct: add a branch prediction


* Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:

> On Thu, 2009-02-26 at 21:06 +0900, KAMEZAWA Hiroyuki wrote:
> > Hmm.. some routine like
> > atomic64_read() can help this ? (But I don't want to use atomic_t here..)
> 
> Yeah, atomic64_t has been proposed numerous times, and x86 
> could actually implement that using cmpxchg8b, just not sure 
> about all the other 32bit archs, and if we start using it in 
> the scheduler, they'd better have it implemented.

I have written a working atomic64_t implementation for 
tip:perfcounters/core, for 32-bit x86.

	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/