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SubjectRe: [2.2.14] Deadlock in ide-tape?
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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