linux-kernel - Re: [PATCH 00/18] x86: Ticket lock + cmpxchg cleanup

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:	Wed, 24 Aug 2011 13:10:56 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Peter Zijlstra <peterz@...radead.org>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>,
	the arch/x86 maintainers <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Nick Piggin <npiggin@...nel.dk>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
Subject: Re: [PATCH 00/18] x86: Ticket lock + cmpxchg cleanup

On 08/24/2011 11:24 AM, Linus Torvalds wrote:
> On Wed, Aug 24, 2011 at 11:03 AM, Peter Zijlstra <peterz@...radead.org> wrote:
>> The patches look good to me, and 50 lines less is always nice too!
>>
>> Acked-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> So I mostly agree, except for the abortion that is the
> __ticket_spin_unlock changes. Please just kill that part.

Could we just kill SMP support for OOSTORE machines now?  That would be
the cleanest possible fix...

> So I'd much have preferred that the xadd helper go in first (07/18),
> then the patch to make __ticket_spin_lock the same for 32/64 would go
> in next (04/18) using that helper, and then they'd just have been
> identical automatically.
>
> Instead, there are a few patches that actually make the code uglier
> temporarily, only to then be undone later. That seems bogus, when it
> looks so simple to fix it.

Yep, OK.  The current series is a history of incremental development; I
can easily clean it up into something that appeared perfectly formed.

    J
--
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/