On 04/23/2011 12:24 AM, Josep Guerrero wrote: > Hello, > >>>> How long did the debugfs output take? >>> I think about 30 minutes. No more than 50 for sure (just by looking at >>> the times of the mails). >>> >>>> Did fsck eventually finish? >>> No. I had to cancel it after it stayed 24 hours in the same state, >>> showing the same message. It never moved beyond "Pass 0a", and always >>> was using 100% CPU in one core. I don't know if it would have finished >>> on its own. >>> >>>> BTW, you said one of the cores was at 100%. What does top show? >>>> Is fsck the main contributor or is some other process spinning? >>> It was fsck (I kept a top opened the whole time, and fsck always was >>> around 99% CPU usage). >>> >>>> I have a theory as to why it is slow. But I would like some >>>> confirmation. My theory had fsck have high wait%. I seem to be missing >>>> something. >>> I didn't look at the wait%, but I checked the physical disk load with >>> iotop and it was very low, so it didn't look like fsck was being slow >>> because of the disk. In the filesystem I successfully "fscked" before >>> (the 3 TB one that took less than 60 minutes), it started doing >>> something similar (very high CPU usage, low disk load) but after several >>> minutes (when the rest of the messages after "Pass 0a" appeared), it did >>> just the opposite: low CPU use, high disk load. Both filesystems are >>> physically on the same set of disks (the 16TB logical volume is an >>> striped LVM volume that fills about 75% of the 21 physical disks and the >>> 3TB is another striped LVM volume filling the remaining space of the >>> same disks) so I don't think it's a problem with the physical devices >>> (of course, I could be wrong). >> File a bz. This will need some investigation. > Sorry, I suppose it must be an stupid question but, what's a "bz"? I 've found > several references to it in the list, but no explanation of what it is or how > it is done.
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