From: Hans Reiser <reiser@namesys.com>
To: Nate Diller <nate.diller@gmail.com>
Cc: Nick Piggin <npiggin@suse.de>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Hugh Dickins <hugh@veritas.com>, Andrew Morton <akpm@osdl.org>,
David Howells <dhowells@redhat.com>,
Christoph Lameter <christoph@lameter.com>,
Martin Bligh <mbligh@google.com>,
Linus Torvalds <torvalds@osdl.org>,
"E. Gryaznova" <grev@namesys.com>
Subject: Re: [PATCH] mm/tracking dirty pages: update get_dirty_limits for mmap tracking
Date: Fri, 23 Jun 2006 00:31:29 -0700 [thread overview]
Message-ID: <449B98D1.3010005@namesys.com> (raw)
In-Reply-To: <5c49b0ed0606211525i57628af5yaef46ee4e1820339@mail.gmail.com>
Nate, you should note that A: increasing to 80% was my idea, and B: the
data from the benchmarks provide no indication that it is a good idea.
That said, it is very possible that C: the benchmark is flawed, because
the variance is so high that I am suspicious that something is wrong
with the benchmark, and D: that the implementation is flawed in some way
we don't yet see.
All that said, I cannot say that we have anything here that suggests the
change is a good change. My intuition says it should be a good change,
but the data does not. Not yet.
Hans
WARNING: multiple messages have this Message-ID (diff)
From: Hans Reiser <reiser@namesys.com>
To: Nate Diller <nate.diller@gmail.com>
Cc: Nick Piggin <npiggin@suse.de>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Hugh Dickins <hugh@veritas.com>, Andrew Morton <akpm@osdl.org>,
David Howells <dhowells@redhat.com>,
Christoph Lameter <christoph@lameter.com>,
Martin Bligh <mbligh@google.com>,
Linus Torvalds <torvalds@osdl.org>,
"E. Gryaznova" <grev@namesys.com>
Subject: Re: [PATCH] mm/tracking dirty pages: update get_dirty_limits for mmap tracking
Date: Fri, 23 Jun 2006 00:31:29 -0700 [thread overview]
Message-ID: <449B98D1.3010005@namesys.com> (raw)
In-Reply-To: <5c49b0ed0606211525i57628af5yaef46ee4e1820339@mail.gmail.com>
Nate, you should note that A: increasing to 80% was my idea, and B: the
data from the benchmarks provide no indication that it is a good idea.
That said, it is very possible that C: the benchmark is flawed, because
the variance is so high that I am suspicious that something is wrong
with the benchmark, and D: that the implementation is flawed in some way
we don't yet see.
All that said, I cannot say that we have anything here that suggests the
change is a good change. My intuition says it should be a good change,
but the data does not. Not yet.
Hans
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next prev parent reply other threads:[~2006-06-23 7:31 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-21 17:01 [PATCH] mm/tracking dirty pages: update get_dirty_limits for mmap tracking Nate Diller
2006-06-21 17:01 ` Nate Diller
2006-06-21 18:08 ` Nick Piggin
2006-06-21 18:08 ` Nick Piggin
2006-06-21 22:25 ` Nate Diller
2006-06-21 22:25 ` Nate Diller
2006-06-23 7:31 ` Hans Reiser [this message]
2006-06-23 7:31 ` Hans Reiser
2006-06-21 18:13 ` Martin Bligh
2006-06-21 18:13 ` Martin Bligh
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