Bug 116379 - swsusp shuts disk down
Summary: swsusp shuts disk down
Status: VERIFIED FIXED
Alias: None
Product: SUSE Linux 10.1
Classification: openSUSE
Component: Kernel (show other bugs)
Version: Beta 4
Hardware: x86 Linux
: P5 - None : Enhancement (vote)
Target Milestone: ---
Assignee: Forgotten User ZhJd0F0L3x
QA Contact: E-mail List
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Reported: 2005-09-11 09:13 UTC by Jan Engelhardt
Modified: 2006-07-15 09:28 UTC (History)
0 users

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Found By: Beta-Customer
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Description Jan Engelhardt 2005-09-11 09:13:49 UTC 
When calling swsusp to use suspend-to-disk, the harddisk is shutdown (à la
`hdparm -y`) after the processes have been frozen, and is then necessarily woken
up again to write the image to the swap partition.
The disk is once again spun down for no reason on resume, and then woken up
again to read the image from the swap partition.
Comment 1 Forgotten User ZhJd0F0L3x 2005-09-12 11:03:25 UTC 
The suspend system / device drivers are designed to do it this way, read LKML
for an explanation (search for "disk yo-yo" should find something about it).
This will be fixed, but not in 10.0
Comment 2 Jan Engelhardt 2006-03-27 15:51:10 UTC 
pingpong issue fixed in 2.6.16 kotd?
Comment 4 Forgotten User ZhJd0F0L3x 2006-04-04 17:18:56 UTC 
is it or is it not?
Comment 5 Jan Engelhardt 2006-04-07 19:39:31 UTC 
Tried 2.6.17-rc1, and is fixed.