linux-kernel - Re: [PATCH] x86: improve algorithm in clflush_cache

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Date:	Wed, 29 Apr 2015 12:28:44 +0200
From:	Borislav Petkov <bp@...e.de>
To:	Ross Zwisler <ross.zwisler@...ux.intel.com>
Cc:	linux-kernel@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, x86@...nel.org
Subject: Re: [PATCH] x86: improve algorithm in clflush_cache_range

On Tue, Apr 28, 2015 at 04:13:12PM -0600, Ross Zwisler wrote:
> The current algorithm used in clflush_cache_range() can cause the last
> cache line of the buffer to be flushed twice.  Fix that algorithm so
> that each cache line will only be flushed once.
> 
> Signed-off-by: Ross Zwisler <ross.zwisler@...ux.intel.com>
> Reported-by: H. Peter Anvin <hpa@...or.com>
> Cc: H. Peter Anvin <hpa@...or.com>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: x86@...nel.org
> Cc: Borislav Petkov <bp@...e.de>
> ---
>  arch/x86/mm/pageattr.c | 13 ++++++-------
>  1 file changed, 6 insertions(+), 7 deletions(-)

Applied, thanks.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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