lkml.org 
[lkml]   [2020]   [Mar]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [RFC 2/3] mm: Add a new page flag PageLayzyFree() for MADV_FREE
From
Date


On 15.3.2020 10.18, Wei Yang wrote:
> On Fri, Feb 28, 2020 at 11:38:18AM +0800, Huang, Ying wrote:
>> From: Huang Ying <ying.huang@intel.com>
>>
>> Now !PageSwapBacked() is used as the flag for the pages freed lazily
>> via MADV_FREE. This isn't obvious enough. So Dave suggested to add a
>> new page flag for that to improve the code readability.
> I am confused with the usage of PageSwapBacked().
>
> Previously I thought this flag means the page is swapin, set in
> swapin_readahead(). While I found page_add_new_anon_rmap() would set it too.
> This means every anon page would carry this flag. Then what is this flag
> means?
>
>

But not all PageSwapBacked() pages are anon, like shmem.


--Mika

\
 
 \ /
  Last update: 2020-03-15 09:55    [W:0.087 / U:3.308 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site