Bug 113335

Summary:	Suspend on SATA-machine pauses for some seconds before writting to disk
Product:	[openSUSE] SUSE LINUX 10.0	Reporter:	Stefan Behlert <behlert>
Component:	Kernel	Assignee:	Jens Axboe <axboe>
Status:	RESOLVED FIXED	QA Contact:	E-mail List <qa-bugs>
Severity:	Minor
Priority:	P5 - None
Version:	Beta 3
Target Milestone:	---
Hardware:	Other
OS:	All
Whiteboard:
Found By:	Other	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---
Attachments:	screenshot

Description Stefan Behlert 2005-08-26 14:45:28 UTC

Acer-machine, suspend-to-disk is working, but has one nuisance: 
After the "Writing data to swap: 0%" is written, the suspending stops for a 
few seconds before continuing. 
I've added a screenshot showing the messages printed. Looks to me like some 
SATA-command is causing the problem.

Comment 1 Stefan Behlert 2005-08-26 14:46:42 UTC

Created attachment 47787 [details]
screenshot

I can reproduce this

Comment 2 Pavel Machek 2005-08-26 22:19:39 UTC

Is that so big problem? So you wait few seconds :-). We have way worse problems
with SATA.

Is it normal delay or is disk trying to spin up in that period?

Comment 3 Forgotten User ZhJd0F0L3x 2005-08-27 08:45:26 UTC

i believe it is hiding a real bug: i have seen it pause for 30 second and then
panic twice (and hang) on a new acer, not sure if it is the same machine.
Also, we want suspend to be faster than reboot, don't we? ;-)

Comment 4 Pavel Machek 2005-08-28 13:43:27 UTC

Jens, do you want to play with this one?

Comment 5 Jens Axboe 2005-08-28 14:18:37 UTC

Sounds like the problem we have with spinning disks up and down. This will be
solved in due time (I believe Pavel already posted patches on lkml for a proper
pm_message_t type), I'd say we just close this.

Comment 6 Stefan Behlert 2005-08-29 08:13:16 UTC

Pavel: The problem is, that we tell everyone 'use suspend-to-disk, it's   
working, and it is fast'. And we have a delay without any visible cause -   
might be frightening some people :)   
During that 5 seconds (might be six, hard to time) nothing happens, no disk  
sound is hearable. Never seen it pausing for a time as long as mentioned by 
seife with beta3. 
And since I know that SATA is problematic, I thought perhaps one of you guys 
is already working on a problem associated with that one.

Comment 7 Stefan Behlert 2005-08-31 15:10:12 UTC

Still waiting a lot of seconds with beta4.

Comment 8 Stefan Behlert 2005-09-02 12:34:33 UTC

 reopening for closing it later

Comment 9 Stefan Behlert 2005-09-02 12:35:33 UTC

with the kotd 2.6.13-20050901172817-default the stocking is gone.