From: Peter Zijlstra <peterz@infradead.org>
To: Will Deacon <will.deacon@arm.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>,
Ingo Molnar <mingo@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
"Paul E.McKenney" <paulmck@linux.vnet.ibm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Davidlohr Bueso <dbueso@suse.de>
Subject: Re: [PATCH 1/5] asm-generic: Add _{relaxed|acquire|release}() variants for inc/dec atomics
Date: Mon, 5 Oct 2015 21:48:24 +0200 [thread overview]
Message-ID: <20151005194824.GF3816@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20151005173243.GF3211@arm.com>
On Mon, Oct 05, 2015 at 06:32:43PM +0100, Will Deacon wrote:
> On Thu, Oct 01, 2015 at 07:39:10AM +0100, Peter Zijlstra wrote:
> > On Wed, Sep 30, 2015 at 01:03:11PM -0700, Davidlohr Bueso wrote:
> > > Similar to what we have for regular add/sub calls. For now, no actual arch
> > > implements them, so everyone falls back to the default atomics... iow,
> > > nothing changes. These will be used in future primitives.
> > >
> >
> > Maybe also do an aargh64 patch for this?
>
> I can follow up with that, since I'm about 60% through adding the
> relaxed/acquire/release versions of all the other primitives. It's a fair
> amount of work thanks to the new atomic instructions making me do everything
> twice... (that and I've been on holiday this past week!)
Right, what I meant was arm (I thought argh64 was the one with _relaxed
bits in, but my memories tricked me, it was ARM).
If you add new _relaxed ops, we'd better convert all archs that support
_relaxed, which would be ARM (for now).
next prev parent reply other threads:[~2015-10-05 19:48 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-30 20:03 [PATCH -tip v3 0/5] locking: Use acquire/release semantics Davidlohr Bueso
2015-09-30 20:03 ` [PATCH 1/5] asm-generic: Add _{relaxed|acquire|release}() variants for inc/dec atomics Davidlohr Bueso
2015-10-01 6:39 ` Peter Zijlstra
2015-10-05 17:32 ` Will Deacon
2015-10-05 19:48 ` Peter Zijlstra [this message]
2015-10-06 9:01 ` Will Deacon
2015-10-06 16:18 ` [tip:locking/core] locking/asm-generic: " tip-bot for Davidlohr Bueso
2015-09-30 20:03 ` [PATCH 2/5] locking/mutex: Use acquire/release semantics Davidlohr Bueso
2015-10-06 16:18 ` [tip:locking/core] " tip-bot for Davidlohr Bueso
2015-09-30 20:03 ` [PATCH 3/5] locking/rtmutex: " Davidlohr Bueso
2015-10-06 16:19 ` [tip:locking/core] " tip-bot for Davidlohr Bueso
2015-09-30 20:03 ` [PATCH 4/5] locking/mcs: " Davidlohr Bueso
2015-10-06 16:19 ` [tip:locking/core] " tip-bot for Davidlohr Bueso
2015-09-30 20:03 ` [PATCH 5/5] locking/rwsem: " Davidlohr Bueso
2015-10-06 16:19 ` [tip:locking/core] " tip-bot for Davidlohr Bueso
2015-09-30 20:37 ` [PATCH -tip v3 0/5] locking: " Thomas Gleixner
2015-10-13 17:04 ` [PATCH 6/5] locking/qspinlock: " Davidlohr Bueso
2015-10-13 17:59 ` Davidlohr Bueso
-- strict thread matches above, loose matches on Subject: below --
2015-09-21 20:17 [PATCH 0/5] locking: " Davidlohr Bueso
2015-09-21 20:17 ` [PATCH 1/5] asm-generic: Add _{relaxed|acquire|release}() variants for inc/dec atomics Davidlohr Bueso
2015-09-20 10:11 [PATCH 0/5] locking: Adopt relaxed barrier semantics Davidlohr Bueso
2015-09-20 10:11 ` [PATCH 1/5] asm-generic: Add _{relaxed|acquire|release}() variants for inc/dec atomics Davidlohr Bueso
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