Messages in this thread | | | Date | Tue, 15 Jun 2010 18:25:42 +0100 | Subject | Re: Why is kslowd accumulating so much CPU time? | From | Andy Whitcroft <> |
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On Mon, Jun 14, 2010 at 10:46 PM, <tytso@mit.edu> wrote: > On Mon, Jun 14, 2010 at 02:42:44PM -0400, Nick Bowler wrote: >> >> This sounds exactly like the issue I've been seeing on a T500 laptop, as >> well (GM45 board). The slowdowns render the system essentially >> unusable, as it can spend a loooong time just moving the mouse cursor a >> few pixels on the screen. During this time, nothing else on the display >> is updating (glxgears drops to 0fps). Things generally seem to be >> working fine if I am not moving the mouse, or if I'm not running X. > > I saw exactly the same behaviour when using the Ubuntu Karmic > userspace. Basically, using a 2.6.35-rc2 (+ vt memory corrupter fix) > kernel, the system was essentially unusable. Interestingly, the > problem went away (with the same kernel) once I updated to Ubuntu > Lucid. I was going to mention that so that hopefully someone with far > more X.org-fu than I could figure out how much of this is a X server > bug, and how much of this was a kernel bug, but things worked just > *fine* with 2.6.34 kernel. > > Occasionally it will happen that the mouse stops tracking, and then I > grumble and curse, and a few seconds later it resolves itself. I > haven't had time to track it down; but the problem was breathtakingly > easy to reproduce with an Ubuntu Karmic userspace. :-)
I am seeing crunchy cursor behavior on boot on Ubuntu Lucid user space with the 2.6.35-rc3 kernel as well. It pretty much always does that on boot, and often later as well. Right now I have four of these chaps each consuming 9% of a CPU. Though they definatly come and go. Very odd:
938 root 15 -5 0 0 0 S 9 0.0 1:00.90 kslowd001 1048 root 15 -5 0 0 0 S 9 0.0 1:01.12 kslowd002 937 root 15 -5 0 0 0 S 8 0.0 1:00.92 kslowd000 1544 root 15 -5 0 0 0 D 8 0.0 1:00.55 kslowd003
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