lkml.org 
[lkml]   [2014]   [Nov]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH] mm/zsmalloc: avoid duplicate assignment of prev_class
From
Hello

2014-11-21 11:43 GMT+08:00 Minchan Kim <minchan@kernel.org>:
> On Thu, Nov 20, 2014 at 09:08:33PM +0800, Mahendran Ganesh wrote:
>> In zs_create_pool(), prev_class is assigned (ZS_SIZE_CLASSES - 1)
>> times. And the prev_class only references to the previous alloc
>> size_class. So we do not need unnecessary assignement.
>>
>> This patch modifies *prev_class* to *prev_alloc_class*. And the
>> *prev_alloc_class* will only be assigned when a new size_class
>> structure is allocated.
>>
>> Signed-off-by: Mahendran Ganesh <opensource.ganesh@gmail.com>
>> ---
>> mm/zsmalloc.c | 9 +++++----
>> 1 file changed, 5 insertions(+), 4 deletions(-)
>>
>> diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
>> index b3b57ef..ac2b396 100644
>> --- a/mm/zsmalloc.c
>> +++ b/mm/zsmalloc.c
>> @@ -970,7 +970,7 @@ struct zs_pool *zs_create_pool(gfp_t flags)
>> int size;
>> int pages_per_zspage;
>> struct size_class *class;
>> - struct size_class *prev_class;
>> + struct size_class *uninitialized_var(prev_alloc_class);
>
> https://lkml.org/lkml/2012/10/27/71
> In addition, I prefer prev_class.

Thanks for you review. I will resend the patch.

>
> Thanks.
>
> --
> Kind regards,
> Minchan Kim


\
 
 \ /
  Last update: 2014-11-21 07:01    [W:0.098 / U:0.368 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site