linux-kernel - Re: [patch 01/23] Fall back on interrupt disable in cmpxchg8b on 80386 and 80486

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]

Date:	Mon, 20 Aug 2007 13:46:54 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	mingo@...hat.com
Subject: Re: [patch 01/23] Fall back on interrupt disable in cmpxchg8b on
 80386 and 80486

On Mon, 20 Aug 2007, Mathieu Desnoyers wrote:

> Yes, I use it as synchronization mechanism for my buffer management algorithm
> in LTTng. Since I write in per-cpu buffers and want to be as reentrant
> as possible wrt other contexts (dealing with NMI as worse case, but also
> applies to MCE..), I use local_cmpxchg to reserve space in my buffers.
> It is faster than the standard cmpxchg.

Ok I have seen these numbers in the OLS papers but I could not reproduce 
them in SLUB.

-
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/