Re: xmon & SCSI ATA devices

[gshan]

Benjamin Herrenschmidt wrote: On Thu, 2009-12-24 at 02:34 -0500, gshan wrote: Hello, xmon and SCSI SATA device driver were installed on my system. When I invoked xmon explicitly for kernel debugging, there're probably pending SCSI requests issued. So those SCSI requests complained timeout when I quited from xmon. I want to find a way to suspend SCSI device before invoking xmon and resume that before quiting from xmon. Anybody knew there is a way to do this? Well, it's non trivial. xmon is very low level and doesn't muck around with drivers etc... Yes. I agree. We could add hacks to avoid those timeouts or even do what you suggest with suspending devices, but that would make entering xmon a -lot- more fragile. The idea is that xmon relies on very little kernel services and can be entered even when things are utterly wrong. Actually, the situation I described above has caused lots of disk issue. The DPT (disk partition table) might be lost because of this. I think it's broken the rule: xmon is assisting to resolve kernel issue, not cause more. To be honest, I'm tempted to leave that as it is. Most of the time, getting into xmon is a one way trip.... Cheers, Ben. Thanks, Gavin _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev

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