lkml.org 
[lkml]   [2012]   [Jun]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 3/3] x86: add local_tlb_flush_kernel_range()
Hello,

On 06/27/2012 03:14 PM, Alex Shi wrote:

> On 06/27/2012 01:53 PM, Minchan Kim wrote:
>
>> On 06/26/2012 01:14 AM, Seth Jennings wrote:
>>
>>> This patch adds support for a local_tlb_flush_kernel_range()
>>> function for the x86 arch. This function allows for CPU-local
>>> TLB flushing, potentially using invlpg for single entry flushing,
>>> using an arch independent function name.
>>>
>>> Signed-off-by: Seth Jennings <sjenning@linux.vnet.ibm.com>
>>
>>
>> Anyway, we don't matter INVLPG_BREAK_EVEN_PAGES's optimization point is 8 or something.
>
>
> Different CPU type has different balance point on the invlpg replacing
> flush all. and some CPU never get benefit from invlpg, So, it's better
> to use different value for different CPU, not a fixed
> INVLPG_BREAK_EVEN_PAGES.


I think it could be another patch as further step and someone who are
very familiar with architecture could do better than.
So I hope it could be merged if it doesn't have real big problem.

Thanks for the comment, Alex.


--
Kind regards,
Minchan Kim


\
 
 \ /
  Last update: 2012-06-27 09:01    [W:0.056 / U:0.836 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site