Ubuntu
linux package

  1. Bug #620074
  2. Comment #219

Comment 219 for bug 620074

Revision history for this message
In , thomas.pi (thomas.pi-linux-kernel-bugs) wrote :

I have noticed, that while working with VMs my system starts swapping after a while. I tried the -rc7 with Mathieus patch (Comment #160) and my system seems to be useable. There is still the non fair io scheduling between processes, but it's another problem. I am using a kernel without "Group CPU Scheduler" and "Control Group Support" and writing this text in firefox at load avg 12.

To reach such high load avg, I have to run eight concurrent dd write operations.

for i in 1 2 3 4 5 6 7 8; do \
  dd if=/dev/zero of=test-$i bs=1M count=4K oflag=direct & echo test-$i; \
done

Copying big files with nautilus makes my system from time to time unusable. With known symptoms such as "Unable to switch desktop" and "mouse freezes".

And finally, I have not seen the complete io freeze with -rc7 kernel on xfs, ext3 and ext4.