Bug 927598

Summary:	massive disk (write) activity after resume
Product:	[openSUSE] openSUSE Distribution	Reporter:	Peter Sütterlin <P.Suetterlin>
Component:	Basesystem	Assignee:	David Sterba <dsterba>
Status:	RESOLVED WONTFIX	QA Contact:	E-mail List <qa-bugs>
Severity:	Normal
Priority:	P5 - None	CC:	bpetkov, chcao, dsterba, jslaby
Version:	13.2	Flags:	jslaby: needinfo? (dsterba)
Target Milestone:	---
Hardware:	Other
OS:	Other
Whiteboard:
Found By:	---	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description Peter Sütterlin 2015-04-17 11:08:33 UTC

I run a fresh installed OS 13.2 including updates, using BTRFS for /.  The system is a laptop which I carry between home and work, and only suspend/resume it for commuting.
After each resume the HD LED starts blinking like mad for typically 1-1.5 hours.  If I check the activity
  echo 1 > /proc/sys/vm/block_dump
the syslog shows tons of entries like
Apr 17 11:57:09 snoopy kernel: kworker/u4:1(16080): WRITE block 17080776 on sdb2 (32 sectors)
Apr 17 11:57:09 snoopy kernel: kworker/u4:4(13640): WRITE block 23284624 on sdb2 (8 sectors)
Apr 17 11:57:09 snoopy kernel: kworker/u4:4(13640): WRITE block 23284744 on sdb2 (8 sectors)
Apr 17 11:57:09 snoopy kernel: kworker/u4:4(13640): WRITE block 23284864 on sdb2 (8 sectors)
Apr 17 11:57:09 snoopy kernel: kworker/u4:4(13640): WRITE block 23284888 on sdb2 (8 sectors)
Apr 17 11:57:09 snoopy kernel: kworker/u4:4(13640): WRITE block 23284944 on sdb2 (8 sectors)
Apr 17 11:57:09 snoopy kernel: kworker/u4:4(13640): WRITE block 23285072 on sdb2 (8 sectors)
Apr 17 11:57:09 snoopy kernel: kworker/u4:4(13640): WRITE block 23285104 on sdb2 (16 sectors)
Apr 17 11:57:09 snoopy kernel: kworker/u4:4(13640): WRITE block 23285232 on sdb2 (8 sectors)
Apr 17 11:57:09 snoopy kernel: kworker/u4:4(13640): WRITE block 23285248 on sdb2 (8 sectors)
Apr 17 11:57:09 snoopy kernel: kworker/u4:4(13640): WRITE block 23285272 on sdb2 (24 sectors)
Apr 17 11:57:09 snoopy kernel: kworker/u4:4(13640): WRITE block 23285520 on sdb2 (8 sectors)
Apr 17 11:57:09 snoopy kernel: kworker/u4:4(13640): WRITE block 23285600 on sdb2 (8 sectors)
Apr 17 11:57:09 snoopy kernel: kworker/u4:4(13640): WRITE block 23285640 on sdb2 (16 sectors)
Apr 17 11:57:09 snoopy kernel: kworker/u4:4(13640): WRITE block 23285784 on sdb2 (8 sectors)
Apr 17 11:57:09 snoopy kernel: kworker/u4:4(13640): WRITE block 23285856 on sdb2 (8 sectors)

sdb2 is my (btrfs) root partition.  As it is on an SSD, I am NOT very pleased with this permanent writing.  What is it?  How can I find out?

Comment 1 Chenzi Cao 2015-04-21 10:12:44 UTC

Hi Kernel-maintainers, I'm really not sure whether it is right to assign it to you, please feel free to reassign whenever necessary, thank you!

Comment 2 Jiri Slaby 2015-05-28 13:18:22 UTC

Maybe David has an idea on what is going on here?

Comment 3 Tomáš Chvátal 2018-04-12 14:03:26 UTC

This version of openSUSE changed to end-of-life (EOL [1]) status. As such
it is no longer maintained, which means that it will not receive any
further security or bug fix updates.
As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of 
openSUSE, or consider the bug still valid, please feel free to reopen this
bug against that version, or open a new ticket.

Thank you for reporting this bug and we are sorry it could not be fixed
during the lifetime of the release.

[1] https://en.opensuse.org/Lifetime