Messages in this thread | | | Date | Tue, 15 Feb 2000 16:22:25 +0000 | From | Steve Dodd <> | Subject | Re: [2.2.14] Deadlock in ide-tape? |
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On Mon, Feb 14, 2000 at 08:31:46PM +0200, Gadi Oxman wrote:
> The trace below shows that the driver is waiting in an ioctl() for > a completion of a mt command.
Ah, I did grovel through the source and come to that conclusion as well (I wasn't thinking very clearly yesterday <g>)
> Which command were you running? After how much time from the > mt command was the panic triggered? > > If this was a retension command, for example, it can take up to 10 > minutes in some tape drives. If the default timeout in ikd is lower > than that, it explains the panic.
It was an MTEOM command, and without the deadlock detection it just blocks for ages (tens of minutes), with no tape drive activity; the problem seems to manifest itself when it's executed right after an MTWEOF (which is a bit of a silly thing to do, I know...). It's an HP Colorado 8Gb drive (i.e. 4Gb <g>) -- is it possible that it's a bug / feature in the drive firmware?
Apart from that, the driver seems to work great though..
Cheers, Steve
-- Steve Dodd, Network Adminstrator, WotNot Ltd.
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