Re: [PATCHv3 1/2] mm: introduce vm_ops->map_pages()

[PATCHv3 0/2] mm: map few pages around fault address if they are in page cache · Kirill A. Shutemov <hidden> · 2014-02-27
[PATCHv3 1/2] mm: introduce vm_ops->map_pages() · Kirill A. Shutemov <hidden> · 2014-02-27
Re: [PATCHv3 1/2] mm: introduce vm_ops->map_pages() · Dave Hansen <dave.hansen@linux.intel.com> · 2014-02-27
Re: [PATCHv3 1/2] mm: introduce vm_ops->map_pages() · Linus Torvalds <torvalds@linux-foundation.org> · 2014-02-27
Re: [PATCHv3 1/2] mm: introduce vm_ops->map_pages() · Dave Hansen <dave.hansen@linux.intel.com> · 2014-02-27
Re: [PATCHv3 1/2] mm: introduce vm_ops->map_pages() · Kirill A. Shutemov <hidden> · 2014-02-28
Re: [PATCHv3 1/2] mm: introduce vm_ops->map_pages() · Benjamin Herrenschmidt <benh@kernel.crashing.org> · 2014-02-28
Re: [PATCHv3 1/2] mm: introduce vm_ops->map_pages() · Andrew Morton <akpm@linux-foundation.org> · 2014-02-27
Re: [PATCHv3 1/2] mm: introduce vm_ops->map_pages() · Andrew Morton <akpm@linux-foundation.org> · 2014-03-03
Re: [PATCHv3 1/2] mm: introduce vm_ops->map_pages() · Kirill A. Shutemov <hidden> · 2014-03-04
Re: [PATCHv3 1/2] mm: introduce vm_ops->map_pages() · Rusty Russell <hidden> · 2014-03-05
Re: [PATCHv3 1/2] mm: introduce vm_ops->map_pages() · Andrew Morton <akpm@linux-foundation.org> · 2014-03-05
Re: [PATCHv3 1/2] mm: introduce vm_ops->map_pages() · Sasha Levin <hidden> · 2014-07-24
Re: [PATCHv3 1/2] mm: introduce vm_ops->map_pages() · Andrey Ryabinin <hidden> · 2014-07-24
Re: [PATCHv3 1/2] mm: introduce vm_ops->map_pages() · Sasha Levin <hidden> · 2014-07-24
Re: [PATCHv3 1/2] mm: introduce vm_ops->map_pages() · Sasha Levin <hidden> · 2014-07-24
Re: [PATCHv3 1/2] mm: introduce vm_ops->map_pages() · Konstantin Khlebnikov <hidden> · 2014-07-24
[PATCH] mm: don't allow fault_around_bytes to be 0 · Andrey Ryabinin <hidden> · 2014-07-28
Re: [PATCH] mm: don't allow fault_around_bytes to be 0 · Andrey Ryabinin <hidden> · 2014-07-28
Re: [PATCH] mm: don't allow fault_around_bytes to be 0 · Kirill A. Shutemov <hidden> · 2014-07-28
Re: [PATCH] mm: don't allow fault_around_bytes to be 0 · Andrey Ryabinin <hidden> · 2014-07-28
Re: [PATCH] mm: don't allow fault_around_bytes to be 0 · Kirill A. Shutemov <hidden> · 2014-07-28
Re: [PATCH] mm: don't allow fault_around_bytes to be 0 · Sasha Levin <hidden> · 2014-07-28
Re: [PATCH] mm: don't allow fault_around_bytes to be 0 · David Rientjes <rientjes@google.com> · 2014-07-28
Re: [PATCH] mm: don't allow fault_around_bytes to be 0 · Dave Hansen <dave.hansen@linux.intel.com> · 2014-07-28
[PATCHv3 2/2] mm: implement ->map_pages for page cache · Kirill A. Shutemov <hidden> · 2014-02-27
Re: [PATCHv3 2/2] mm: implement ->map_pages for page cache · Andrew Morton <akpm@linux-foundation.org> · 2014-02-27
Re: [PATCHv3 2/2] mm: implement ->map_pages for page cache · Kirill A. Shutemov <hidden> · 2014-02-28
Re: [PATCHv3 2/2] mm: implement ->map_pages for page cache · Konstantin Khlebnikov <hidden> · 2014-04-02
Re: [PATCHv3 2/2] mm: implement ->map_pages for page cache · Kirill A. Shutemov <hidden> · 2014-04-02
Re: [PATCHv3 0/2] mm: map few pages around fault address if they are in page cache · Linus Torvalds <torvalds@linux-foundation.org> · 2014-02-27
Re: [PATCHv3 0/2] mm: map few pages around fault address if they are in page cache · Kirill A. Shutemov <hidden> · 2014-02-28
RE: [PATCHv3 0/2] mm: map few pages around fault address if they are in page cache · Wilcox, Matthew R <hidden> · 2014-02-28
Re: [PATCHv3 0/2] mm: map few pages around fault address if they are in page cache · Linus Torvalds <torvalds@linux-foundation.org> · 2014-02-28
Re: [PATCHv3 0/2] mm: map few pages around fault address if they are in page cache · Kirill A. Shutemov <hidden> · 2014-03-12

From: Kirill A. Shutemov <hidden>
Date: 2014-02-28 00:18:58
Also in: linux-fsdevel, lkml

On Thu, Feb 27, 2014 at 02:34:55PM -0800, Dave Hansen wrote:

Kirill's git test suite runs did show that it _can_ hurt in some cases.

And see last use-case for how much it can hurt. :)

It shouldn't differs much for the same *number* of pages between [u]archs
unless setup of the pte is significantly more expensive or page fault is
faster.

But of course, I can move FAULT_AROUND_PAGES to arch/x86/ and let
architecture mantainers to decide if they want the feature. ;)

-- 
 Kirill A. Shutemov

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