Messages in this thread | | | Date | Tue, 1 May 2007 16:23:01 -0700 | From | Bill Irwin <> | Subject | Re: [2/6] add config option to vmalloc stacks (was: Re: [-mm patch] i386: enable 4k stacks by default) |
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At some point in the past, I wrote: >> These IRQ stacks are per-cpu, not per-IRQ. It may make sense to >> implement per-IRQ stacks, in which case dynamic allocation at the time >> of request_irq() will make sense.
On Wed, May 02, 2007 at 12:07:45AM +0100, Alan Cox wrote: > This depends if active IRQ count exceeds active CPU count worst cases. > For the big boxes it might well do but for small ones we seem to be best > with per CPU.
I'll leave IRQ stacks per-CPU, then. The prevailing opinion on large i386 does not favor doing much of anything to accommodate it.
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