Sebastian Kuzminsky wrote: > Bill Davidsen <davidsen@xxxxxxx> wrote: > >>Sebastian Kuzminsky wrote: >> >> >>>Now it works, but I dont trust it one bit. >>> >>>I had been seeing almost immediate, perfectly repeatable hard lockups >>>in 2.6.15-rc5 and 2.6.15-rc5-mm3, when using sata_mv, RAID, and LVM >>>together. Nothing in the syslog or on the console, and the system is >>>totally unresponsive to the keyboard & network. >>> >>>My hardware setup is: four Seagate Barracuda 500 GB disks, on a Marvell >>>MV88SX6081 8-port SATA-II PCI-X controller, on a PCI-X bus (64/66). >>> >>>The disks work great when accessed directly. They work great when used >>>as four PVs for LVM, and when assembled into a 4-disk RAID-6. >>> >>>But when I make a RAID-6 array out of them, and use the array as a PV, >>>the system would hang completely, within seconds. (This is with LVM >>>2.02.01, libdevicemapper 1.02.02, and dm-driver 4.5.0.) >>> >>>I turned on all the debugging options in the kernel config hoping to get >>>some insight, but this "debug" kernel doesnt crash. It's running fine, >>>and I'm pounding on it. A timing problem in the interaction between >>>LVM and RAID? Some kind of wierd heisenbug.... >>> >>> >>>I'd be happy to do any debugging tests people suggest. >>> >>> >>> >>> >> >>I've been waiting for more info on this, did it get fixed? 2.6.15? > > > Still broken in 2.6.15. With all the debugging options OFF in the config, > the system stayed up < 24 hours under load, then a hard lockup like > before: nothing on the console, magic sysrq doesnt work, no caps-lock, > no ping. Note that this is different from before: it actually ran a > little bit before locking up, rather than locking up within seconds like > it did with 2.6.15-rc5. > > With all the debugging options ON, it's stayed up for 3+ days now (and > still running) with no problems. > > > Any suggestions for how to debug this are welcome! ;-) I couldn't quite tell from your description: are you getting the lockup when you try to mount a filesystem that uses the RAID+LVM as a device? Or do you get errors when doing LVM-level stuff (ie no filesystem can even be put on the device)? In the case of the former, what filesystem are you using? --Matt - 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
