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. NeilBrown - 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
