Messages in this thread | | | Date | Wed, 7 Mar 2007 15:02:27 -0800 | From | Pete Zaitcev <> | Subject | Re: [linux-usb-devel] khubd and ent:sda1 sucking CPU with reiser4 + USB HD |
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On Wed, 7 Mar 2007 17:18:29 -0500 (EST), Alan Stern <stern@rowland.harvard.edu> wrote:
> I've never heard of a process failing to show up in a SysRq-t listing. It > suggests something is wrong with the process management in the kernel you > were using. That leads me to think a non -mm kernel might give more > informative results.
I think, if a process is looping, it's not shown in SysRq-t. So maybe khubd is on a CPU.
In RHEL we have a patch for SysRq-w, which showed all CPU states by the way of a special IPI (unless looping with closed interrups, of course). But this capability seems a bit degraded in stock SysRq-w. It might not catch this (does not seem for me in 2.6.20).
Another possibility is, something killed khubd. It's only a process after all. Remember how we had grief with it being killed by "telinit 1".
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