From: David Laight <David.Laight@ACULAB.COM>
To: 'Marco Elver' <elver@google.com>,
"Paul E. McKenney" <paulmck@kernel.org>
Cc: Chris Wilson <chris@chris-wilson.co.uk>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"intel-gfx@lists.freedesktop.org"
<intel-gfx@lists.freedesktop.org>,
Andrew Morton <akpm@linux-foundation.org>,
Randy Dunlap <rdunlap@infradead.org>,
"stable@vger.kernel.org" <stable@vger.kernel.org>
Subject: RE: [PATCH] list: Prevent compiler reloads inside 'safe' list iteration
Date: Tue, 10 Mar 2020 15:05:57 +0000 [thread overview]
Message-ID: <77ff4da6b0a7448c947af6de4fb43cdb@AcuMS.aculab.com> (raw)
In-Reply-To: <CANpmjNNT3HY7i9TywX0cAFqBtx2J3qOGOUG5nHzxAZ4bk_qgtg@mail.gmail.com>
From: Marco Elver
> Sent: 10 March 2020 14:10
...
> FWIW, for writes we're already being quite generous, in that plain
> aligned writes up to word-size are assumed to be "atomic" with the
> default (conservative) config, i.e. marking such writes is optional.
> Although, that's a generous assumption that is not always guaranteed
> to hold (https://lore.kernel.org/lkml/20190821103200.kpufwtviqhpbuv2n@willie-the-truck/).
Remind me to start writing everything in assembler.
That and to mark all structure members 'volatile'.
David
-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)
next prev parent reply other threads:[~2020-03-10 15:06 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-10 9:21 Chris Wilson
2020-03-10 11:36 ` David Laight
2020-03-10 11:50 ` Chris Wilson
2020-03-10 12:23 ` David Laight
2020-03-10 12:50 ` Chris Wilson
2020-03-10 12:50 ` Paul E. McKenney
2020-03-10 13:52 ` Mark Rutland
2020-03-10 14:09 ` Marco Elver
2020-03-10 15:05 ` David Laight [this message]
2020-03-10 15:47 ` Paul E. McKenney
2020-03-12 2:58 ` Andrew Morton
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