Re: [PATCH] x86: Add an explicit barrier() to clflushopt()

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Subject: Re: [PATCH] x86: Add an explicit barrier() to clflushopt()
From: "H. Peter Anvin" <hpa@xxxxxxxxx>
Date: Fri, 8 Jan 2016 21:55:32 -0800
Delivered-to: dri-devel@xxxxxxxxxxxxxxxxxxxxx
In-reply-to: <568EE777.80700@zytor.com>
References: <1445248735-11915-1-git-send-email-chris@chris-wilson.co.uk> <20160107101652.GF652@nuc-i3427.alporthouse.com> <CALCETrU8otVfBe0+N-E0sc=j2L79qh7gqte7QSVb_YzGbJYNCA@mail.gmail.com> <20160107194413.GA25144@nuc-i3427.alporthouse.com> <568ED31F.1090004@zytor.com> <20160107215401.GB25144@nuc-i3427.alporthouse.com> <568EE6E6.4000904@zytor.com> <568EE777.80700@zytor.com>
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On 01/07/16 14:32, H. Peter Anvin wrote:
>
> Nevermind.  CLFLUSH is not ordered with regards to CLFLUSHOPT to the
> same cache line.
> 

*Except* to the same cache line, dammit.

	-hpa


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References:
- [PATCH] x86: Add an explicit barrier() to clflushopt()
  - From: Chris Wilson
- Re: [PATCH] x86: Add an explicit barrier() to clflushopt()
  - From: Chris Wilson
- Re: [PATCH] x86: Add an explicit barrier() to clflushopt()
  - From: Andy Lutomirski
- Re: [PATCH] x86: Add an explicit barrier() to clflushopt()
  - From: Chris Wilson
- Re: [PATCH] x86: Add an explicit barrier() to clflushopt()
  - From: H. Peter Anvin
- Re: [PATCH] x86: Add an explicit barrier() to clflushopt()
  - From: Chris Wilson
- Re: [PATCH] x86: Add an explicit barrier() to clflushopt()
  - From: H. Peter Anvin
- Re: [PATCH] x86: Add an explicit barrier() to clflushopt()
  - From: H. Peter Anvin

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