Messages in this thread | | | Date | Tue, 6 Mar 2007 10:36:20 -0500 (EST) | From | Alan Stern <> | Subject | Re: [linux-usb-devel] khubd and ent:sda1 sucking CPU with reiser4 + USB HD |
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On Tue, 6 Mar 2007, Oliver Neukum wrote:
> > Am Dienstag, 6. März 2007 05:13 schrieb Eric Buddington: > > reiser4[khubd(163)]: commit_current_atom (fs/reiser4/txnmgr.c:1049)[nikita-3176]: > > WARNING: Flushing like mad: 16384 > > reiser4[khubd(163)]: commit_current_atom (fs/reiser4/txnmgr.c:1049)[nikita-3176]: > > WARNING: Flushing like mad: 32768 > > ...<many simiar messages> > > > > Most problematically, khubd and ent:sda1! are conspiring to suck 100% > > CPU time, even after powering off the drive. A bunch of processes are > > stuck in 'D' state, possibly because they're trying to access the dead > > disk, which won't umount ("device is busy"). > > It looks like khubd allocates memory and enters reiser4. Possibly we have > GFP_KERNEL in khubd where we should have GFP_NOIO or reiser4 has > a problem dealing with IO failures.
A more complete stack trace (for example, Alt-SysRq-T) would help.
Alan Stern
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