lkml.org 
[lkml]   [2012]   [Jun]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: RFC: Easy-Reclaimable LRU list
On Sat, Jun 23, 2012 at 11:53 AM, Rik van Riel <riel@redhat.com> wrote:
> On 06/23/2012 12:45 AM, Kamezawa Hiroyuki wrote:
>
>> I think this is interesting approach. Major concern is how to guarantee
>> EReclaimable
>> pages are really EReclaimable...Do you have any idea ? madviced pages
>> are really EReclaimable ?
>
> I suspect the EReclaimable pages can only be clean page
> cache pages that are not mapped by any processes.
>
> Once somebody tries to use the page, mark_page_accessed
> will move it to another list.

100% agree.


>> A (very) small concern is will you use one more page-flags for this ? ;)
>
> This could be an issue on a 32 bit system, true.

Do we really need SwapBacked bit? Actually swap-backed is
per-superblock attribute and don't change dynamically (i.e. no race
happen). thus this bit
might be able to move into page->mapping or page->mapping->host.


\
 
 \ /
  Last update: 2012-06-24 13:41    [W:0.049 / U:0.328 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site