Re: XFS vs Elevators (was Re: [PATCH RFC] nilfs2: continuous snapshotting file system)

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To: Nick Piggin <nickpiggin@...>
Cc: gus3 <musicman529@...>, Szabolcs Szakacsits <szaka@...>, Andrew Morton <akpm@...>, <linux-fsdevel@...>, <linux-kernel@...>, <xfs@...>
Date: Thursday, August 21, 2008 - 4:53 am

On Thu, Aug 21, 2008 at 05:00:39PM +1000, Nick Piggin wrote:

We've already got plenty of explicit unplugs in XFS to get stuff
moving quickly - I'll just have to add another....


It's getting too bloody complex, IMO. What is right for one elevator
is wrong for another, so as a filesystem developer I have to pick
one to target. With the way the elevators have been regressing,
improving and changing behaviour, I am starting to think that I
should be picking the noop scheduler. Any 'advanced' scheduler that
is slower than the same test on the noop scheduler needs fixing...

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com
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Messages in current thread:
[PATCH RFC] nilfs2: continuous snapshotting file system, Ryusuke Konishi, (Tue Aug 19, 10:45 pm)
Re: [PATCH RFC] nilfs2: continuous snapshotting file system, Ryusuke Konishi, (Thu Aug 21, 12:57 am)
Re: [PATCH RFC] nilfs2: continuous snapshotting file system, Ryusuke Konishi, (Wed Aug 20, 12:13 pm)
Re: [PATCH RFC] nilfs2: continuous snapshotting file system, Ryusuke Konishi, (Tue Aug 26, 12:54 pm)
Re: [PATCH RFC] nilfs2: continuous snapshotting file system, Ryusuke Konishi, (Fri Aug 29, 2:29 am)
Re: [PATCH RFC] nilfs2: continuous snapshotting file system, Ryusuke Konishi, (Fri Aug 29, 12:37 pm)
Re: [PATCH RFC] nilfs2: continuous snapshotting file system, Szabolcs Szakacsits, (Wed Aug 20, 5:25 pm)
Re: [PATCH RFC] nilfs2: continuous snapshotting file system, Szabolcs Szakacsits, (Wed Aug 20, 10:46 pm)
Re: XFS vs Elevators (was Re: [PATCH RFC] nilfs2: continuous..., Szabolcs Szakacsits, (Thu Aug 21, 1:10 pm)
Re: XFS vs Elevators (was Re: [PATCH RFC] nilfs2: continuous..., Szabolcs Szakacsits, (Thu Aug 21, 1:33 pm)
Re: XFS vs Elevators (was Re: [PATCH RFC] nilfs2: continuous..., Szabolcs Szakacsits, (Fri Aug 22, 8:44 am)
Re: XFS vs Elevators (was Re: [PATCH RFC] nilfs2: continuous..., Szabolcs Szakacsits, (Sat Aug 23, 8:52 am)
Re: XFS vs Elevators (was Re: [PATCH RFC] nilfs2: continuous..., Martin Steigerwald, (Fri Aug 22, 2:49 am)
Re: XFS vs Elevators (was Re: [PATCH RFC] nilfs2: continuous..., Martin Steigerwald, (Thu Aug 21, 7:02 am)
Re: XFS vs Elevators (was Re: [PATCH RFC] nilfs2: continuous..., Martin Steigerwald, (Thu Aug 21, 11:00 am)
Re: XFS vs Elevators (was Re: [PATCH RFC] nilfs2: continuous..., Dave Chinner, (Thu Aug 21, 4:53 am)
Re: [PATCH RFC] nilfs2: continuous snapshotting file system, Szabolcs Szakacsits, (Wed Aug 20, 5:48 pm)
Re: [PATCH RFC] nilfs2: continuous snapshotting file system, Ryusuke Konishi, (Wed Aug 20, 2:47 pm)