Re: Preempt? (was Re: Cannot enable DMA on SATA drive(SCSI-libsata, VIA SATA))

[Andrew Morton]

Jeff Garzik <jgarzik@xxxxxxxxx> wrote:
>
> Preempt will always be something I ask people to turn off when reporting 
>  driver bugs; it just adds too much complicated mess for zero gain.

What driver bugs are apparent with preemption which are not already SMP bugs?

Only thing I can think of is unguarded use of per-cpu data, and we have
runtime debug checks for that now.

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