Neil Brown wrote: > On Thursday February 15, bugfood-ml@xxxxxxxxxx wrote: >> I think I have found an easily-reproducible bug in Linux 2.6.20. I have >> already applied the "Fix various bugs with aligned reads in RAID5" >> patch, and that had no effect. It appears to be related to the resync >> process, and makes the system lock up, hard. > > I'm guessing that the problem is at a lower level than raid. > What IDE/SATA controllers do you have? Google to see if anyone else > has had problems with them in 2.6.20. >> During the lock up, nothing is printed to the console, and the magic >> SysRQ key has no effect; I have to poke the reset button. > > Sound's like interrupts are disabled, but x86_64 always enables the > NMI watchdog which should trigger if interrupts are off for too long. > > Do you have CONFIG_DETECT_SOFTLOCKUP=y in your .config (it is in the > kernel debugging options menu I think). If not, setting that would be > worth a try. > > A raid5 resync across 5 sata drives on a couple of different > silicon-image controllers doesn't lock up for me. Wow, thanks for the quick response. I have to go to bed now, but I'll try to get you that information tomorrow. Thanks, Corey - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
