lkml.org 
[lkml]   [2010]   [Apr]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: swapping when there's a free memory
Hi!

> I captured this output of vmstat. The machine was freeing cache and
> swapping out pages even when there was a plenty of free memory.
>
> The machine is sparc64 with 1GB RAM with 2.6.34-rc4. This abnormal
> swapping happened during running spadfsck --- a fsck program for a custom
> filesystem that caches most reads in its internal cache --- so it reads
> buffers and allocates memory at the same time.
>
> Note that sparc64 doesn't have any low/high memory zones, so it couldn't
> be explained by filling one zone and needing to allocate pages in it.

Fragmented memory + high-order allocation?

> This abnormal behavior doesn't happen everytime, it happend about twice
> for many spadfsck attempts.

...yep, that would be random.
Pavel


--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html


\
 
 \ /
  Last update: 2010-04-25 09:17    [W:0.044 / U:0.156 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site