From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>, Rik van Riel <riel@redhat.com>,
Andi Kleen <ak@linux.intel.com>,
Matthew Wilcox <matthew.r.wilcox@intel.com>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Dave Chinner <david@fromorbit.com>, Ning Qu <quning@gmail.com>,
linux-mm <linux-mm@kvack.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
anton@samba.org, Paul Mackerras <paulus@samba.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: [PATCHv3 1/2] mm: introduce vm_ops->map_pages()
Date: Fri, 28 Feb 2014 02:18:58 +0200 [thread overview]
Message-ID: <20140228001858.GC8034@node.dhcp.inet.fi> (raw)
In-Reply-To: <530FBD8F.7090304@linux.intel.com>
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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WARNING: multiple messages have this Message-ID (diff)
From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>, Rik van Riel <riel@redhat.com>,
Andi Kleen <ak@linux.intel.com>,
Matthew Wilcox <matthew.r.wilcox@intel.com>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Dave Chinner <david@fromorbit.com>, Ning Qu <quning@gmail.com>,
linux-mm <linux-mm@kvack.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
anton@samba.org, Paul Mackerras <paulus@samba.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: [PATCHv3 1/2] mm: introduce vm_ops->map_pages()
Date: Fri, 28 Feb 2014 02:18:58 +0200 [thread overview]
Message-ID: <20140228001858.GC8034@node.dhcp.inet.fi> (raw)
In-Reply-To: <530FBD8F.7090304@linux.intel.com>
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
next prev parent reply other threads:[~2014-02-28 0:18 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-27 19:53 [PATCHv3 0/2] mm: map few pages around fault address if they are in page cache Kirill A. Shutemov
2014-02-27 19:53 ` Kirill A. Shutemov
2014-02-27 19:53 ` [PATCHv3 1/2] mm: introduce vm_ops->map_pages() Kirill A. Shutemov
2014-02-27 19:53 ` Kirill A. Shutemov
2014-02-27 21:59 ` Dave Hansen
2014-02-27 21:59 ` Dave Hansen
2014-02-27 22:06 ` Linus Torvalds
2014-02-27 22:06 ` Linus Torvalds
2014-02-27 22:34 ` Dave Hansen
2014-02-27 22:34 ` Dave Hansen
2014-02-28 0:18 ` Kirill A. Shutemov [this message]
2014-02-28 0:18 ` Kirill A. Shutemov
2014-02-28 11:50 ` Benjamin Herrenschmidt
2014-02-28 11:50 ` Benjamin Herrenschmidt
2014-02-27 22:08 ` Andrew Morton
2014-02-27 22:08 ` Andrew Morton
2014-03-03 23:16 ` Andrew Morton
2014-03-04 1:26 ` Kirill A. Shutemov
2014-03-04 1:26 ` Kirill A. Shutemov
2014-03-04 1:26 ` Kirill A. Shutemov
2014-03-05 0:04 ` Rusty Russell
2014-03-05 0:04 ` Rusty Russell
2014-03-05 20:02 ` Andrew Morton
2014-03-05 20:02 ` Andrew Morton
2014-07-24 3:33 ` Sasha Levin
2014-07-24 3:33 ` Sasha Levin
2014-07-24 6:53 ` Andrey Ryabinin
2014-07-24 6:53 ` Andrey Ryabinin
2014-07-24 12:48 ` Sasha Levin
2014-07-24 12:48 ` Sasha Levin
2014-07-24 13:05 ` Sasha Levin
2014-07-24 13:05 ` Sasha Levin
2014-07-24 13:30 ` Konstantin Khlebnikov
2014-07-24 13:30 ` Konstantin Khlebnikov
2014-07-28 7:43 ` [PATCH] mm: don't allow fault_around_bytes to be 0 Andrey Ryabinin
2014-07-28 7:43 ` Andrey Ryabinin
2014-07-28 7:47 ` Andrey Ryabinin
2014-07-28 7:47 ` Andrey Ryabinin
2014-07-28 9:36 ` Kirill A. Shutemov
2014-07-28 9:36 ` Kirill A. Shutemov
2014-07-28 9:36 ` Kirill A. Shutemov
2014-07-28 10:27 ` Andrey Ryabinin
2014-07-28 10:27 ` Andrey Ryabinin
2014-07-28 10:27 ` Andrey Ryabinin
2014-07-28 10:27 ` Andrey Ryabinin
2014-07-28 10:52 ` Kirill A. Shutemov
2014-07-28 10:52 ` Kirill A. Shutemov
2014-07-28 12:32 ` Sasha Levin
2014-07-28 12:32 ` Sasha Levin
2014-07-28 22:43 ` David Rientjes
2014-07-28 22:43 ` David Rientjes
2014-07-28 15:26 ` Dave Hansen
2014-07-28 15:26 ` Dave Hansen
2014-02-27 19:53 ` [PATCHv3 2/2] mm: implement ->map_pages for page cache Kirill A. Shutemov
2014-02-27 19:53 ` Kirill A. Shutemov
2014-02-27 21:47 ` Andrew Morton
2014-02-27 21:47 ` Andrew Morton
2014-02-28 0:31 ` Kirill A. Shutemov
2014-02-28 0:31 ` Kirill A. Shutemov
2014-04-02 18:03 ` Konstantin Khlebnikov
2014-04-02 18:03 ` Konstantin Khlebnikov
2014-04-02 19:07 ` Kirill A. Shutemov
2014-04-02 19:07 ` Kirill A. Shutemov
2014-02-27 21:28 ` [PATCHv3 0/2] mm: map few pages around fault address if they are in " Linus Torvalds
2014-02-27 21:28 ` Linus Torvalds
2014-02-28 0:10 ` Kirill A. Shutemov
2014-02-28 0:10 ` Kirill A. Shutemov
2014-02-28 3:52 ` Wilcox, Matthew R
2014-02-28 3:52 ` Wilcox, Matthew R
2014-02-28 23:08 ` Linus Torvalds
2014-02-28 23:08 ` Linus Torvalds
2014-03-12 14:22 ` Kirill A. Shutemov
2014-03-12 14:22 ` Kirill A. Shutemov
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