linux-kernel - Re: [PATCH] slub: Disable the lockless allocator

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: <alpine.DEB.2.00.1103261636210.29331@router.home>
Date:	Sat, 26 Mar 2011 16:36:51 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Ingo Molnar <mingo@...e.hu>
cc:	Eric Dumazet <eric.dumazet@...il.com>,
	Pekka Enberg <penberg@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	tj@...nel.org, npiggin@...nel.dk, rientjes@...gle.com,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH] slub: Disable the lockless allocator

On Sat, 26 Mar 2011, Ingo Molnar wrote:

> > Subject: per_cpu: Fixup cmpxchg_double for !SMP
> >
> > cmpxchg_double should only be provided for SMP. In the UP case
> > the GS register is not defined and the function will fail.
> >
> > Signed-off-by: Christoph Lameter <cl@...ux.com>
>
> I.e. the bug got introduced by:
>
>  | commit b9ec40af0e18fb7d02106be148036c2ea490fdf9
>  | Author: Christoph Lameter <cl@...ux.com>
>  | Date:   Mon Feb 28 11:02:24 2011 +0100
>  |
>  |     percpu, x86: Add arch-specific this_cpu_cmpxchg_double() support
>
> and then the lockless allocator made use of it, right?

Correct.

--
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/