Re: [patch]x86: spread tlb flush vector between nodes

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From: Shaohua Li

Subject: Re: [patch]x86: spread tlb flush vector between nodes

Date: Tuesday, October 19, 2010 - 6:13 pm

On Tue, 2010-10-19 at 21:34 +0800, Andi Kleen wrote:
quoted text> >  
> > +static int tlb_vector_offset[NR_CPUS] __read_mostly;
> 
> Never use NR_CPUS. Always use per cpu data.
> 
> Otherwise you waste a lot of space on a CONFIG_MAX_SMP
> kernel running on a smaller box.
ha, I want it to be __read_mostly to avoid cache pollution, apparently
we have no per cpu API to do this. Maybe I need add one.

Thanks,
Shaohua

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Messages in current thread:

[patch]x86: spread tlb flush vector between nodes, Shaohua Li, (Wed Oct 13, 12:41 am)

Re: [patch]x86: spread tlb flush vector between nodes, Andi Kleen, (Wed Oct 13, 1:16 am)

Re: [patch]x86: spread tlb flush vector between nodes, Shaohua Li, (Wed Oct 13, 1:39 am)

Re: [patch]x86: spread tlb flush vector between nodes, Ingo Molnar, (Wed Oct 13, 4:19 am)

Re: [patch]x86: spread tlb flush vector between nodes, Shaohua Li, (Mon Oct 18, 10:39 pm)

Re: [patch]x86: spread tlb flush vector between nodes, H. Peter Anvin, (Mon Oct 18, 11:21 pm)

Re: [patch]x86: spread tlb flush vector between nodes, Ingo Molnar, (Tue Oct 19, 1:44 am)

Re: [patch]x86: spread tlb flush vector between nodes, Shaohua Li, (Tue Oct 19, 1:55 am)

Re: [patch]x86: spread tlb flush vector between nodes, Ingo Molnar, (Tue Oct 19, 3:37 am)

Re: [patch]x86: spread tlb flush vector between nodes, Shaohua Li, (Tue Oct 19, 6:28 am)

Re: [patch]x86: spread tlb flush vector between nodes, Andi Kleen, (Tue Oct 19, 6:34 am)

Re: [patch]x86: spread tlb flush vector between nodes, Shaohua Li, (Tue Oct 19, 6:13 pm)

Re: [patch]x86: spread tlb flush vector between nodes, H. Peter Anvin, (Tue Oct 19, 7:39 pm)


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