Re: [PATCH -v4 1/2] lib, Make gen_pool memory allocator lockless

[Peter Zijlstra]

On Wed, 2010-11-17 at 14:05 +0800, Huang Ying wrote:
> Hi, Peter,
> 
> Do you think think irq_work should depend on that?  Or we just
> reimplement irq_work based on lockless list and make irq_work depends on
> lockless list? 

If you can make it use a lockless list thing that's fine.

I'm not sure Andrew's CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG makes much sense
for CONFIG_ARCH_HAVE_NMI=n though..

Anyway, make sure to consolidate net/rds/xlist.h and its users, having
two lockless lists is one too many.

> At least as the first step, I prefer to just make lockless list depend
> on CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG.

But only if the platform has NMIs, otherwise its moot.
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