Bug 9592 - swapping in 2.6.24-rc5-git3
Summary: swapping in 2.6.24-rc5-git3
Alias: None
Product: Memory Management
Classification: Unclassified
Component: Other (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: Andrew Morton
Depends on:
Blocks: 9243
  Show dependency tree
Reported: 2007-12-17 14:04 UTC by Rafael J. Wysocki
Modified: 2009-03-23 09:14 UTC (History)
3 users (show)

See Also:
Kernel Version: 2.6.24-rc5-git3
Regression: Yes
Bisected commit-id:


Description Rafael J. Wysocki 2007-12-17 14:04:36 UTC
Subject         : swapping in 2.6.24-rc5-git3
Submitter       : Lukas Hejtmanek <xhejtman@ics.muni.cz>
References      : http://lkml.org/lkml/2007/12/17/98
Handled-By      : Jan Kara <jack@suse.cz>
Comment 1 Natalie Protasevich 2008-02-01 21:38:15 UTC
Citing Lukas:

does /proc/sys/vm/swappiness still work as expected? 
# /proc/sys/vm# cat swappiness 
but scp-ing 2GB file causes many processes are swapped out due to increase of
the file cache size.
I think it is a regression in recent rc versions as I use 2.6.24-xx kernels on
my new laptop from the very beginnig I have the laptopt and I did not notice
such behaviour before.

I have 1 GB RAM and I was coping a 2GB file from the network to the laptop.
After the operation, 600MB of the swap area has been consumed. At the
beginning of the copy, the swap area was empty.
I have mapped ratio about 78 while scp-ing the file. Distress suddenly raises
from 0 to 100. At this point, all the processes are swapped out.

I guess it happens if scp is faster than the local disk which happens if
I scp-ing over GE from desktop (with fast disk - and reading) to laptop (slow
disk - and writing).
Comment 2 Lukas Hejtmanek 2008-02-02 02:00:37 UTC
Yes. But it happens mostly if much memory is eaten by firefox and X server. It disappeared after I had upgraded to 2GB RAM.
Comment 3 Alan 2009-03-23 09:14:52 UTC
There are too many further changes for this report to remain useful. Closing. If you have a similar problem with a current kernel please reopen or open a new bug thanks

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