From: Linus Torvalds <torvalds@osdl.org>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Martin Bligh <mbligh@google.com>,
Peter Chubb <peterc@gelato.unsw.edu.au>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Christoph Lameter <clameter@sgi.com>,
Nick Piggin <piggin@cyberone.com.au>, Andi Kleen <ak@suse.de>,
Rohit Seth <rohitseth@google.com>, Andrew Morton <akpm@osdl.org>,
hugh@veritas.com, riel@redhat.com, andrea@suse.de,
arjan@infradead.org, apw@shadowen.org, mel@csn.ul.ie,
marcelo@kvack.org, anton@samba.org, paulmck@us.ibm.com,
linux-mm <linux-mm@kvack.org>
Subject: Re: [RFC][PATCH 1/3] tracking dirty pages in shared mappings -V4
Date: Tue, 9 May 2006 18:24:14 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0605091819350.3718@g5.osdl.org> (raw)
In-Reply-To: <446133FD.6090903@yahoo.com.au>
On Wed, 10 May 2006, Nick Piggin wrote:
>
> Or do these databases use regular filesystem backed shared files?
Some definitely do.
I don't work much with them, but I'm pretty sure, that's exactly what
Berkeley DB does. Probably SQLite too (and maybe MySQL?).
And I know that nntpd used to map its "newsgroup list" (which is a
database, although not a relational one, but a really stupid line-based
plain-text setup).
So yes, we'll impact performance. Whether it will be really noticeable or
not, who knows.
The only way to find out may be to just apply the patches (which I'm
currently planning on doing early after 2.6.17 unless we can get data
otherwise) and see who screams, if anybody.
Linus
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next prev parent reply other threads:[~2006-05-10 1:24 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-05 20:35 [RFC][PATCH] tracking dirty pages in shared mappings Peter Zijlstra
2006-05-06 13:18 ` Nick Piggin
2006-05-06 13:34 ` Peter Zijlstra
2006-05-06 13:47 ` Nick Piggin
2006-05-06 15:29 ` Peter Zijlstra
2006-05-07 0:40 ` Nick Piggin
2006-05-07 3:43 ` Nick Piggin
2006-05-08 6:43 ` Christoph Lameter
2006-05-08 7:23 ` Peter Zijlstra
2006-05-08 19:20 ` [RFC][PATCH 1/2] tracking dirty pages in shared mappings -V3 Peter Zijlstra
2006-05-09 5:41 ` Christoph Lameter
2006-05-09 6:06 ` Peter Zijlstra
2006-05-09 20:44 ` [RFC][PATCH 1/3] tracking dirty pages in shared mappings -V4 Peter Zijlstra
2006-05-09 20:52 ` Peter Chubb
2006-05-09 20:55 ` Martin Bligh
2006-05-09 22:56 ` Brian Twichell
2006-05-10 0:24 ` Linus Torvalds
2006-05-10 0:29 ` Nick Piggin
2006-05-10 1:24 ` Linus Torvalds [this message]
2006-05-11 15:02 ` Andrew Morton
2006-05-11 16:39 ` Andy Whitcroft
2006-05-11 22:52 ` Christoph Lameter
2006-05-11 23:30 ` Linus Torvalds
2006-05-11 23:44 ` Andrew Morton
2006-05-12 0:10 ` Linus Torvalds
2006-05-12 8:07 ` Andy Whitcroft
2006-05-12 14:25 ` Martin J. Bligh
2006-05-14 15:58 ` Andy Whitcroft
2006-05-12 1:51 ` Nick Piggin
2006-05-12 4:30 ` Andrew Morton
2006-05-12 5:05 ` Nick Piggin
2006-05-12 7:06 ` Peter Zijlstra
2006-05-12 8:04 ` Nick Piggin
2006-05-12 8:52 ` Peter Zijlstra
2006-05-12 8:07 ` Nick Piggin
2006-05-12 4:51 ` Christoph Lameter
2006-05-09 20:44 ` [RFC][PATCH 2/3] throttle writers of shared mappings Peter Zijlstra
2006-05-09 22:54 ` Nick Piggin
2006-05-09 22:55 ` Nick Piggin
2006-05-10 6:25 ` Peter Zijlstra
2006-05-09 20:44 ` [RFC][PATCH 3/3] optimize follow_pages() Peter Zijlstra
2006-05-10 6:30 ` Peter Zijlstra
2006-05-08 19:24 ` [RFC][PATCH 2/2] throttle writers of shared mappings Peter Zijlstra
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