Date: Thu, 16 Aug 2007 05:49:50 -0700 (PDT)
From: Martin Knoblauch <spamtrap@knobisoft.de>
Reply-To: spamtrap@knobisoft.de
Subject: RE: [PATCH 00/23] per device dirty throttling -v9
To: linux-kernel@vger.kernel.org
Cc: Peter zijlstra <a.p.zijlstra@chello.nl>
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>Per device dirty throttling patches
>
>These patches aim to improve balance_dirty_pages() and directly
>address three issues:
>1) inter device starvation
>2) stacked device deadlocks
>3) inter process starvation
>
>1 and 2 are a direct result from removing the global dirty
>limit and using per device dirty limits. By giving each device
>its own dirty limit is will no longer starve another device,
>and the cyclic dependancy on the dirty limit is broken.
>
>In order to efficiently distribute the dirty limit across
>the independant devices a floating proportion is used, this
>will allocate a share of the total limit proportional to the
>device's recent activity.
>
>3 is done by also scaling the dirty limit proportional to the
>current task's recent dirty rate.
>
>Changes since -v8:
>- cleanup of the proportion code
>- fix percpu_counter_add(&counter, -(unsigned long))
>- fix per task dirty rate code
>- fwd port to .23-rc2-mm2

Peter,

 any chance to get a rollup against 2.6.22-stable?

 The 2.6.23 series may not be usable for me due to the
nosharedcache changes for NFS (the new default will massively
disturb the user-space automounter).

Cheers
Martin 


------------------------------------------------------
Martin Knoblauch
email: k n o b i AT knobisoft DOT de
www:   http://www.knobisoft.de
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