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Date: Wed, 30 Dec 2015 12:43:48 -0800
Message-ID: <CA+55aFx5awBuuroUXt363w9WXn+TvqfoeKu6VYALu_BONQKb3w@mail.gmail.com>
Subject: Re: [PATCH v4.4-rc7] sched: isolate task_struct bitfields according
 to synchronization domains
From: Linus Torvalds <torvalds@linux-foundation.org>
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To: Tejun Heo <tj@kernel.org>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>, Ingo Molnar <mingo@redhat.com>, Sasha Levin <sasha.levin@oracle.com>, Andrew Morton <akpm@linux-foundation.org>, Johannes Weiner <hannes@cmpxchg.org>, Michal Hocko <mhocko@kernel.org>, cgroups <cgroups@vger.kernel.org>, "linux-mm@kvack.org" <linux-mm@kvack.org>, Vladimir Davydov <vdavydov@parallels.com>, kernel-team <kernel-team@fb.com>, Dmitry Vyukov <dvyukov@google.com>, Peter Zijlstra <peterz@infradead.org>

On Wed, Dec 30, 2015 at 12:41 PM, Tejun Heo <tj@kernel.org> wrote:
>
> Right, I was thinking alpha was doing rmw's for things smaller than
> 64bit.  That's 32bit, not 64.

Right. Alpha has trouble only with 8-bit and 16-bit fields. 32-bit
fields should be "atomic" on all architectures, modulo compiler bugs
(and we've had those).

                 Linus

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