RE: [Xen-devel] [PATCH] "lock cmpxch8b" and split locks

To:	"Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>
Subject:	RE: [Xen-devel] [PATCH] "lock cmpxch8b" and split locks
From:	"Puthiyaparambil, Aravindh" <aravindh.puthiyaparambil@xxxxxxxxxx>
Date:	Wed, 5 Oct 2005 18:51:02 -0400
Cc:	"Koren, Bradley J" <Bradley.Koren@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, "Vessey, Bruce A" <Bruce.Vessey@xxxxxxxxxx>, "Subrahmanian, Raj" <raj.subrahmanian@xxxxxxxxxx>
Delivery-date:	Wed, 05 Oct 2005 22:48:39 +0000
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Thread-topic:	[Xen-devel] [PATCH] "lock cmpxch8b" and split locks

I just realized that moving 'tlbflush_timestamp' to the end of the
structure will make us trip up on cmpxchg(&page->u.inuse.type_info, x,
nx) in put_page_type().

I think we have to come up with an alternative solution. 

Aravindh

> -----Original Message-----
> From: Keir Fraser [mailto:Keir.Fraser@xxxxxxxxxxxx]
> Sent: Wednesday, October 05, 2005 6:40 PM
> To: Puthiyaparambil, Aravindh
> Cc: Vessey, Bruce A; xen-devel@xxxxxxxxxxxxxxxxxxx; Koren, Bradley J;
> Subrahmanian, Raj
> Subject: Re: [Xen-devel] [PATCH] "lock cmpxch8b" and split locks
> 
> 
> On 5 Oct 2005, at 23:16, Puthiyaparambil, Aravindh wrote:
> 
> > Which looks something like my attachment? :-)
> >
> > Signed off by: Aravindh Puthiyaparambil
> > <aravindh.puthiyaparambil@xxxxxxxxxx>
> 
> Turns out it breaks x86/64. I checked in a fixed up version.
> 
>   -- Keir


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RE: [Xen-devel] [PATCH] "lock cmpxch8b" and split locks