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From: "Jan Beulich" <JBeulich@novell.com>
To: Ian Campbell <Ian.Campbell@eu.citrix.com>,
	Jeremy Fitzhardinge <jeremy@goop.org>
Cc: "randy.dunlap@oracle.com" <randy.dunlap@oracle.com>,
	Jeremy Fitzhardinge <Jeremy.Fitzhardinge@citrix.com>,
	"eric.dumazet@gmail.com" <eric.dumazet@gmail.com>,
	"konrad.wilk@oracle.com" <konrad.wilk@oracle.com>,
	"virtualization@lists.linux-foundation.org"
	<virtualization@lists.linux-foundation.org>,
	"mingo@redhat.com" <mingo@redhat.com>,
	"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
	"hpa@zytor.com" <hpa@zytor.com>,
	"tglx@linutronix.de" <tglx@linutronix.de>,
	"mirq-linux@rere.qmqm.pl" <mirq-linux@rere.qmqm.pl>,
	"pazke@donpac.ru" <pazke@donpac.ru>,
	David Miller <davem@davemloft.net>
Subject: Re: [PATCH] xen: drop anti-dependency on X86_VISWS
Date: Fri, 08 Apr 2011 16:42:00 +0100	[thread overview]
Message-ID: <4D9F48E8020000780003AA48@vpn.id2.novell.com> (raw)
In-Reply-To: <4D9F28FE.9000803@goop.org>

>>> On 08.04.11 at 17:25, Jeremy Fitzhardinge <jeremy@goop.org> wrote:
> On 04/07/2011 11:38 PM, Ian Campbell wrote:
>> Is there any downside to this patch (is X86_CMPXCHG in the same sort of
>> boat?)
> 
> Only if we don't use cmpxchg in shared memory with other domains or the
> hypervisor.  (I don't think it will dynamically switch between real and
> emulated cmpxchg depending on availability.)

Actually it does - see the "#ifndef CONFIG_X86_CMPXCHG" section
in asm/cmpxchg_32.h.

Jan

  parent reply	other threads:[~2011-04-08 15:42 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-03-31 11:01 [PATCH RESEND] net: convert xen-netfront to hw_features Michał Mirosław
2011-03-31 11:13 ` Ian Campbell
2011-03-31 11:13 ` Ian Campbell
2011-03-31 11:37   ` Michał Mirosław
2011-03-31 11:37   ` Michał Mirosław
2011-04-02  3:54 ` David Miller
2011-04-03 11:07   ` [PATCH] xen: netfront: fix declaration order Eric Dumazet
2011-04-03 17:35     ` Michał Mirosław
2011-04-03 17:35     ` Michał Mirosław
2011-04-04  0:24     ` David Miller
2011-04-04  0:24     ` David Miller
2011-04-04  9:55       ` [PATCH] xen: drop anti-dependency on X86_VISWS (Was: Re: [PATCH] xen: netfront: fix declaration order) Ian Campbell
2011-04-06 21:45         ` [PATCH] xen: drop anti-dependency on X86_VISWS David Miller
2011-04-07  6:58           ` Ian Campbell
2011-04-07 17:00             ` H. Peter Anvin
2011-04-08  6:46               ` Ian Campbell
2011-04-08  6:46               ` Ian Campbell
2011-04-08 20:15                 ` H. Peter Anvin
2011-04-08 20:15                 ` H. Peter Anvin
2011-04-08 20:37                 ` [tip:x86/cpu] x86, cpu: Move AMD Elan Kconfig under "Processor family" tip-bot for Ian Campbell
2011-04-07 17:00             ` [PATCH] xen: drop anti-dependency on X86_VISWS H. Peter Anvin
2011-04-07 18:07             ` Jeremy Fitzhardinge
2011-04-08  6:38               ` Ian Campbell
2011-04-08  6:38               ` Ian Campbell
2011-04-08 15:25                 ` Jeremy Fitzhardinge
2011-04-08 15:42                   ` [Xen-devel] " Jan Beulich
2011-04-08 15:42                   ` Jan Beulich [this message]
2011-04-08 18:24                     ` Jeremy Fitzhardinge
2011-04-09 10:34                       ` Ian Campbell
2011-04-14  8:20                         ` Jeremy Fitzhardinge
2011-04-14  8:20                         ` [Xen-devel] " Jeremy Fitzhardinge
2011-04-09 10:34                       ` Ian Campbell
2011-04-08 18:24                     ` Jeremy Fitzhardinge
2011-04-08 15:25                 ` Jeremy Fitzhardinge
2011-04-07 18:07             ` Jeremy Fitzhardinge
2011-04-07  6:58           ` Ian Campbell
2011-04-06 21:45         ` David Miller
2011-04-04  9:55       ` [PATCH] xen: drop anti-dependency on X86_VISWS (Was: Re: [PATCH] xen: netfront: fix declaration order) Ian Campbell
2011-04-03 11:07   ` [PATCH] xen: netfront: fix declaration order Eric Dumazet
2011-04-04 12:29   ` [PATCH RESEND] net: convert xen-netfront to hw_features Ian Campbell
2011-04-04 12:29   ` Ian Campbell
2011-04-04 18:08     ` David Miller
2011-04-04 18:08     ` David Miller
2011-04-02  3:54 ` David Miller

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