linux-kernel - Re: [patch 0/6] Per cpu structures for SLUB

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:	Thu, 23 Aug 2007 12:25:04 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Peter Zijlstra <peterz@...radead.org>
cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [patch 0/6] Per cpu structures for SLUB

On Thu, 23 Aug 2007, Peter Zijlstra wrote:

> while I like this patch set I'm at odds with the interaction of this and
> making the alloc/free fast paths lockless. 
> 
> The main race is s->cpu_slab[] and c->freelist. How does one close that
> gap?

By either reloading the cpu slab after disabling interupts (my initial 
approach) or by disabling preemption.

> (btw, have you looked at my -rt slub patch?)

I skimmed over it. Not sure what to make of it.

-
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/