On Wed, Dec 14, 2005 at 04:26:18PM -0800, Kevin Oberman wrote: > I am attaching a dmesg. I do have a few of drivers (uhci, pcm, psm, > atkbd0 and ichsmb) that are still marked as GIANT-LOCKED, but I'm not > using the USB very often. And I'm not using pcm or ichsmb during the > dump, either. I think everyone has the mouse and keyboard under GIANT, > but I can't really see those as a problem, either.
A bunch of things are sharing interrupts with USB..disable it and see if that helps. Also check vmstat -i to see if some device is storming. If not, turn on MUTEX_PROFILING(9) in your kernel and run the dump (or something faster that also exhibits the problem), then look for what is contending with Giant. Kris
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