Messages in this thread | | | From | "" <> | Date | Mon, 15 Jul 2002 09:11:34 +0100 | Subject | scsi detect and kgdb |
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I have been writing a scsi module and as part of the module initialisation I would like to delay while waiting for a specific condition. I have tried to put the detect routine in a loop which spins on jiffies + a timeout and my hardware condition. I had all sorts of problems with this code and I found that module load locked up. I tried using barrier and schedule in this loop and found that schedule worked for me most of the time.
I thought I would have a look at the code with kgdb. Firstly I noticed that schedule is not defined in the kgdb enabled kernel. Also even if I put this detect routine in a spin for a while my interrupts do not get serviced until after this spin and quite possibly not until the detect routine returns.
I would like to know the correct way to facilitate a delay in a scsi module detect routine, while waiting for a hardware condition which gets satisfied by a number of interrupts. If this condition is not met in a timeout period the code also continue.
I would also like to understand the kgdb kernel behaviour.
I am running a 2.4.16 kernel.
Cheers
Simon. __________________________
Simon Haynes - Baydel Phone : 44 (0) 1372 378811 Email : simon@baydel.com __________________________ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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