lkml.org 
[lkml]   [2009]   [Apr]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] vmscan: evict use-once pages first (v2)
On Thu, 30 Apr 2009 17:45:36 -0700
Andrew Morton <akpm@linux-foundation.org> wrote:

> Were you able to tell whether altering /proc/sys/vm/swappiness
> appropriately regulated the rate at which the mapped page count
> decreased?

That should not make a difference at all for mapped file
pages, after the change was merged that makes the VM ignores
the referenced bit of mapped active file pages.

Ever since the split LRU code was merged, all that the
swappiness controls is the aggressiveness of file vs
anonymous LRU scanning.

Currently the kernel has no effective code to protect the
page cache working set from streaming IO. Elladan's bug
report shows that we do need some kind of protection...

--
All rights reversed.


\
 
 \ /
  Last update: 2009-05-01 03:03    [W:0.701 / U:1.168 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site