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SubjectRe: [PATCH] Improve pci_alloc_consistent wrapper on preemptive kernels
Andi Kleen wrote:
> On Fri, 30 Jul 2004 13:16:28 -0400
> Jeff Garzik <jgarzik@pobox.com> wrote:
>
>
>
>>1) Changing from GFP_ATOMIC to <something else> may break code
>
>
> x86-64 did it for a long time and I am not aware of problems with it
> (however I don't know how widespread CONFIG_PREEMPT use on x86-64 is)
>
>
>>2) Conversely from #1, I also worry why GFP_ATOMIC would be needed at
>>all. I code all my drivers to require that pci_alloc_consistent() be
>>called from somewhere that is allowed to sleep.
>
>
> Maybe you do, but others don't.

Certainly. Therefore, changing from GFP_ATOMIC will increase likelihood
of breakage, no?

Jeff



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