Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks | KernelTrap

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks

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From: Andi Kleen <andi@...>

To: Andrew Morton <akpm@...>

Cc: Mel Gorman <mel@...>, <linuxppc-dev@...>, <libhugetlbfs-devel@...>, <linux-kernel@...>, <linux-mm@...>

Subject: Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks

Date: Wednesday, August 6, 2008 - 2:49 pm

Andrew Morton <akpm@linux-foundation.org> writes:

quoted text> Do we expect that this change will be replicated in other
> memory-intensive apps?  (I do).

The catch with 2MB pages on x86 is that x86 CPUs generally have
much less 2MB TLB entries than 4K entries. So if you're unlucky
and access a lot of mappings you might actually thrash more with
them. That is why they are not necessarily an universal win.

-Andi
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Messages in current thread:

[RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Eric Munson, (Mon Jul 28, 3:17 pm)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Andrew Morton, (Wed Jul 30, 4:43 am)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Mel Gorman, (Wed Jul 30, 1:23 pm)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Andrew Morton, (Wed Jul 30, 1:34 pm)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Andi Kleen, (Wed Aug 6, 2:49 pm)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Nick Piggin, (Thu Jul 31, 2:04 am)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Andrew Morton, (Thu Jul 31, 2:14 am)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Nick Piggin, (Thu Jul 31, 2:26 am)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Mel Gorman, (Thu Jul 31, 7:27 am)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Nick Piggin, (Thu Jul 31, 7:51 am)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Mel Gorman, (Thu Jul 31, 9:50 am)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Michael Ellerman, (Thu Jul 31, 10:32 am)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Mel Gorman, (Wed Jul 30, 3:30 pm)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Andrew Morton, (Wed Jul 30, 4:07 pm)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Mel Gorman, (Thu Jul 31, 6:31 am)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Dave Hansen, (Mon Aug 4, 5:10 pm)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Mel Gorman, (Tue Aug 5, 7:11 am)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Dave Hansen, (Tue Aug 5, 12:12 pm)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Mel Gorman, (Tue Aug 5, 12:28 pm)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Dave Hansen, (Tue Aug 5, 1:53 pm)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Mel Gorman, (Wed Aug 6, 5:02 am)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Dave Hansen, (Wed Aug 6, 3:50 pm)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Mel Gorman, (Thu Aug 7, 12:06 pm)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Dave Hansen, (Thu Aug 7, 1:29 pm)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Mel Gorman, (Mon Aug 11, 4:04 am)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Christoph Lameter, (Wed Jul 30, 3:40 pm)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Andrew Morton, (Wed Jul 30, 4:41 am)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Eric B Munson, (Wed Jul 30, 11:08 am)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Eric B Munson, (Wed Jul 30, 11:04 am)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Dave Hansen, (Mon Jul 28, 4:33 pm)

Re: [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks, Eric B Munson, (Mon Jul 28, 5:23 pm)

[PATCH 3/5] Split boundary checking from body of do_munmap, Eric Munson, (Mon Jul 28, 3:17 pm)

[PATCH 1/5 V2] Align stack boundaries based on personality, Eric Munson, (Mon Jul 28, 3:17 pm)

Re: [PATCH 1/5 V2] Align stack boundaries based on personality, Dave Hansen, (Mon Jul 28, 4:09 pm)

[PATCH 2/5 V2] Add shared and reservation control to hugetlb..., Eric Munson, (Mon Jul 28, 3:17 pm)

[PATCH 4/5 V2] Build hugetlb backed process stacks, Eric Munson, (Mon Jul 28, 3:17 pm)

Re: [PATCH 4/5 V2] Build hugetlb backed process stacks, Dave Hansen, (Mon Jul 28, 4:37 pm)

[PATCH 5/5 V2] [PPC] Setup stack memory segment for hugetlb ..., Eric Munson, (Mon Jul 28, 3:17 pm)

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