lkml.org 
[lkml]   [2009]   [Aug]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] x86: Use clflush() instead of wbinvd() whenever possible when changing mapping
Pavel Machek skrev:
> On Fri 2009-07-24 09:53:01, Thomas Hellstrom wrote:
>
>> The current code uses wbinvd() when the area to flush is > 4MB. Although this
>> may be faster than using clflush() the effect of wbinvd() on irq
>> latencies
>>
>
> You are slowing the kernel down, and you did not write down the
> reasons. bad.
>
>
I may slow the kernel down or speed it up depending on your hardware
configuration. The reasons should be quite obvious if you read the
discussion following the patch.

/Thomas



\
 
 \ /
  Last update: 2009-08-02 18:25    [W:0.078 / U:1.860 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site