Messages in this thread | ![/](/images/icornerl.gif) | | Date | Thu, 6 Apr 2006 20:47:12 +0200 | From | Jan Kara <> | Subject | Re: Hanging ext3 or USB, linux 2.6.16-rc6-mm2 |
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> I managed to hang ext3 or usb today. > I have a small machine that boot off a compactflash card. > I want to use a bigger card, so I used scp to copy everything > from that machine to a new 4GB card in a usb cardreader. > This cardreader have never given me trouble before, but is > usually used for reading. > > I decided on a ext3 fs in order to avoid long fsck runs, > and a minimal 4MB journal in order to not waste space. > Disk seeks are supposed to be really cheap on a device > with no moving parts anyway. The root reserved percentage > is 1% instead of the usual 5% - more space, and fragmentation > will probably not hurt much with cheap seeks. > > When scp had filled the card to 71% of capacity (according to df), > it stopped in the middle of a file. I first suspected network > errors, but a "ls /mnt" hung. > > I now have the following processes in D-state: > [khubd] [scsi_eh_4] [usb-storage] [kjournald] scp, > 3 x [pdflush], 2 x ls, lsusb, and a sync. > > Could this be a ext3 problem due to the small journal or something? > > Or is a usb problem more likely? "Dmesg" shows an > usb disconnect sometime after I mounted that filesystem, > but it seems to be usblp0 which looks like the printer to me. I'd guess it is some USB/block layer problem. If just ext3 hung, then you would not see [usb-storage] and similar hung. I would need to see where each process hung to tell more..
Honza -- Jan Kara <jack@suse.cz> SuSE CR Labs - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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