"kworker" writes to disc every 5 seconds on battery
Hello! I have noticed that my current setup of Chrome writes to disc
every second. While hunting for the problem, I have found an old bug
report on Google Code about this, and from my tests I concluded my
solution for now would be to run Chrome with its profile and cache in a
tmpfs. Problem solved, or rather, not solved at all.
In a laptop running on battery, it would be desirable to let the HD spin
down a bit sometimes, right, right, right? Well, I think so, so after
optimizing the settings for some applications, I have found these two
spoiled brats who write to the disc frequently, and never let it sleep:
jbd2/sda3-8 and kworker/u8:0.
The jbd2/sda3-8 problem seems to have been solved by remounting the
partition with commit=60, so no more journal writes every five seconds.
But what about this kworker/u8:0 lad? Who is he, and what is he doing? I
know it is a kernel worker, but not more than this. After some search, I
found someone saying I should run: `echo l | sudo tee
/proc/sysrq-trigger', which outputs some nice information, but which I
could not understand. So I have asked my mother, because she was the
person who taught me how to walk, if she could read it, and was left
puzzled as to how there could be something even our ancestors couldn't
understand.
Is there a way for me to know what is kworker/u8:0 writing to the disc
every five seconds? Also, if it's not a bother, could someone test if
this also happens there? The commands I run while on battery were:
echo 1 | sudo tee /proc/sys/vm/block_dump
tail -F /var/log/debug | grep -v dirtied
echo 0 | sudo tee /proc/sys/vm/block_dump
And by the way, my kernel is 3.15.10-zen-686-pae
Thank you!
Teresa e Junior
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