Messages in this thread | | | Subject | Re: [git pull] more SLUB updates for 2.6.25 | From | Andi Kleen <> | Date | 08 Feb 2008 15:58:05 +0100 |
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Eric Dumazet <dada1@cosmosbay.com> writes: > > What about IRQ masking then ? > > Many CPU pay high cost for cli/sti pair...
Many? In the x86 world only P4. On the other cores cli/sti (and even pushf ; cli ; popf) is reasonably fast.
> > And SLAB/SLUB allocators, even if only used from process context, want > to disable/re-enable interrupts... > > I understand kmalloc() want generic pools, but dedicated pools could > avoid this cli/sti
While there are a lot of P4s around they are obsolete by now and I would advise against major redesigns for tuning obsolete CPUs.
-Andi
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