linux-kernel - Re: [PATCH v2 1/3] x86/xen: Avoid fast syscall path for Xen PV guests

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Message-ID: <CALCETrVEyX8f++o_9+65u6JUo000rYBwqhspHuST+FnhZYm6Ww@mail.gmail.com>
Date:	Tue, 15 Dec 2015 07:57:51 -0800
From:	Andy Lutomirski <luto@...capital.net>
To:	Boris Ostrovsky <boris.ostrovsky@...cle.com>
Cc:	Borislav Petkov <bp@...e.de>, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	David Vrabel <david.vrabel@...rix.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Andrew Lutomirski <luto@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>,
	Linux Virtualization <virtualization@...ts.linux-foundation.org>
Subject: Re: [PATCH v2 1/3] x86/xen: Avoid fast syscall path for Xen PV guests

On Tue, Dec 15, 2015 at 7:54 AM, Boris Ostrovsky
<boris.ostrovsky@...cle.com> wrote:
> On 12/15/2015 10:48 AM, Borislav Petkov wrote:
>>
>> On Tue, Dec 15, 2015 at 10:21:37AM -0500, Boris Ostrovsky wrote:
>>>
>>> I know this has been in the tip tree --- when do you think this will go
>>> Linus tree? In the 4.4 timeframe?
>>
>> It is queued for 4.5 currently.
>>
>>> Xen 32-bit PV guests are broken without this.
>>
>> So this needs to go into 4.4 or even earlier? Since 5f310f739b4c went
>> into 4.4, I'd think 4.4 only for this fix too? Yes?
>
>
> Oh, I didn't realize this is scheduled for 4.5. It indeed needs to go into
> 4.4 because of 5f310f739b4c.

Agreed.

>
> Thanks.
> -boris
>
>
>



-- 
Andy Lutomirski
AMA Capital Management, LLC
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