Messages in this thread | | | Date | Wed, 17 Nov 2010 19:16:01 +0800 | Subject | Re: [PATCH -v4 1/2] lib, Make gen_pool memory allocator lockless | From | huang ying <> |
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On Wed, Nov 17, 2010 at 6:49 PM, Peter Zijlstra <peterz@infradead.org> wrote: > 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 will try to do that.
> I'm not sure Andrew's CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG makes much sense > for CONFIG_ARCH_HAVE_NMI=n though..
Sorry, I do not find ARCH_HAVE_NMI in any Kconfig, can you help me to point out? I think cmpxchg can be used safely in lock-less code on architectures without NMI.
> Anyway, make sure to consolidate net/rds/xlist.h and its users, having > two lockless lists is one too many.
Sure.
>> 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.
Yes.
Best Regards, Huang Ying -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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