From: David Gibson <dwg@au1.ibm.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: aik@ozlabs.ru, aliguori@us.ibm.com, rusty@rustcorp.com.au,
qemu-devel@nongnu.org, agraf@suse.de
Subject: Re: [Qemu-devel] [PATCH] virtio: Make memory barriers be memory barriers
Date: Fri, 2 Sep 2011 10:08:50 +1000 [thread overview]
Message-ID: <20110902000850.GL11906@yookeroo.fritz.box> (raw)
In-Reply-To: <4E5F2A95.6000403@redhat.com>
On Thu, Sep 01, 2011 at 08:47:49AM +0200, Paolo Bonzini wrote:
> On 09/01/2011 08:09 AM, David Gibson wrote:
> >The patch defines wmb() as __sync_synchronize(), a cross platform memory
> >barrier primitive available in sufficiently recent gcc versions (gcc 4.2
> >and after?). If we care about older gccs then this patch will need to
> >be updated with some sort of fallback.
>
> Yes, though RHEL5's 4.1 has it backported.
>
> >Signed-off-by: Alexey Kardashevskiy<aik@ozlabs.ru>
> >Signed-off-by: David Gibson<david@gibson.dropbear.id.au>
>
> It will most definitely break OpenBSD, but anyway:
Uh, why?
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
next prev parent reply other threads:[~2011-09-02 0:39 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-01 6:09 [Qemu-devel] [PATCH] virtio: Make memory barriers be memory barriers David Gibson
2011-09-01 6:47 ` Paolo Bonzini
2011-09-02 0:08 ` David Gibson [this message]
2011-09-02 6:49 ` Paolo Bonzini
2011-09-03 11:53 ` Blue Swirl
2011-09-01 7:37 ` Sasha Levin
2011-09-01 7:38 ` Sasha Levin
2011-09-01 7:56 ` Paolo Bonzini
2011-09-02 0:09 ` David Gibson
2011-09-01 15:30 ` Michael S. Tsirkin
2011-09-01 16:14 ` Paolo Bonzini
2011-09-01 16:34 ` Michael S. Tsirkin
2011-09-01 20:31 ` Paolo Bonzini
2011-09-02 15:45 ` Michael S. Tsirkin
2011-09-03 14:46 ` David Gibson
2011-09-04 9:16 ` Michael S. Tsirkin
2011-09-05 4:43 ` David Gibson
2011-09-05 9:19 ` Michael S. Tsirkin
2011-09-06 3:12 ` David Gibson
2011-09-06 6:55 ` Paolo Bonzini
2011-09-06 9:02 ` David Gibson
2011-09-06 9:28 ` Avi Kivity
2011-09-06 9:35 ` Michael S. Tsirkin
2011-09-06 9:38 ` Paolo Bonzini
2011-09-05 7:41 ` Paolo Bonzini
2011-09-05 8:06 ` Michael S. Tsirkin
2011-09-05 9:42 ` Paolo Bonzini
2011-09-03 16:19 ` Paolo Bonzini
2011-09-04 8:47 ` Michael S. Tsirkin
2011-09-02 0:11 ` David Gibson
2011-09-02 6:11 ` Paolo Bonzini
2011-09-02 15:57 ` Michael S. Tsirkin
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