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Re: [patch] mm: reduce pagetable-freeing latencies

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To: Peter Zijlstra <peterz@...>
Cc: Benjamin Herrenschmidt <benh@...>, Andi Kleen <andi@...>, Andrew Morton <akpm@...>, Ingo Molnar <mingo@...>, <linux-kernel@...>, Hugh Dickins <hugh@...>
Date: Wednesday, July 25, 2007 - 5:46 am

> You could perhaps use C99 variable length arrays to avoid the stack

It generates frame pointers, but that's not that bad.  I'm not 
aware of any other bad side effects. Ok the compiler will limit
your goto usage, but that's more a good thing.

But since you always have to strictly limit the array in kernel code anyways
you could as well just allocate the fixed limit.

-Andi
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Messages in current thread:
[patch] mm: reduce pagetable-freeing latencies, Ingo Molnar, (Tue Jul 24, 4:38 am)
Re: [patch] mm: reduce pagetable-freeing latencies, Benjamin Herrenschmidt, (Tue Jul 24, 5:40 am)
Re: [patch] mm: reduce pagetable-freeing latencies, Andrew Morton, (Tue Jul 24, 4:54 am)
Re: [patch] mm: reduce pagetable-freeing latencies, Ingo Molnar, (Tue Jul 24, 7:22 am)
Re: [patch] mm: reduce pagetable-freeing latencies, Benjamin Herrenschmidt, (Tue Jul 24, 5:40 am)
Re: [patch] mm: reduce pagetable-freeing latencies, Andi Kleen, (Tue Jul 24, 8:13 am)
Re: [patch] mm: reduce pagetable-freeing latencies, Benjamin Herrenschmidt, (Tue Jul 24, 5:29 pm)
Re: [patch] mm: reduce pagetable-freeing latencies, Peter Zijlstra, (Wed Jul 25, 2:44 am)
Re: [patch] mm: reduce pagetable-freeing latencies, Benjamin Herrenschmidt, (Fri Jul 27, 9:36 pm)
Re: [patch] mm: reduce pagetable-freeing latencies, Hugh Dickins, (Sat Jul 28, 1:54 am)
Re: [patch] mm: reduce pagetable-freeing latencies, Benjamin Herrenschmidt, (Sat Jul 28, 6:36 pm)
Re: [patch] mm: reduce pagetable-freeing latencies, Andi Kleen, (Wed Jul 25, 5:46 am)
Re: [patch] mm: reduce pagetable-freeing latencies, Benjamin Herrenschmidt, (Wed Jul 25, 6:08 am)
Re: [patch] mm: reduce pagetable-freeing latencies, Andi Kleen, (Wed Jul 25, 6:26 am)
Re: [patch] mm: reduce pagetable-freeing latencies, Benjamin Herrenschmidt, (Wed Jul 25, 6:46 am)
Re: [patch] mm: reduce pagetable-freeing latencies, Hugh Dickins, (Thu Jul 26, 1:11 pm)
Re: [patch] mm: reduce pagetable-freeing latencies, Benjamin Herrenschmidt, (Thu Jul 26, 5:35 pm)
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