Re: [PATCH 1/3] pvclock: Add CPU barries to get correct version value

From	Andy Lutomirski <luto@amacapital.net>
Newsgroups	linux.kernel
Subject	Re: [PATCH 1/3] pvclock: Add CPU barries to get correct version value
Date	2016-05-27 17:50 +0200
Message-ID	<rDsbo-5gf-15@gated-at.bofh.it> (permalink)
References	<rDjhL-8fO-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Thu, May 26, 2016 at 11:17 PM, Minfei Huang <mnghuan@gmail.com> wrote:
> Protocol for the "version" fields is: hypervisor raises it (making it
> uneven) before it starts updating the fields and raises it again (making
> it even) when it is done.  Thus the guest can make sure the time values
> it got are consistent by checking the version before and after reading
> them.
>
> Add CPU barries after getting version value just like what function
> vread_pvclock does, because all of callees in this function is inline.

LGTM.

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[PATCH 1/3] pvclock: Add CPU barries to get correct version value Minfei Huang <mnghuan@gmail.com> - 2016-05-27 08:20 +0200
  Re: [PATCH 1/3] pvclock: Add CPU barries to get correct version value Andy Lutomirski <luto@amacapital.net> - 2016-05-27 17:50 +0200

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