Re: Pluggable Disk Scheduler Project

2007-10-19 Thread Karsten Behrmann
I wouldn't focus on just anticipation, but also other types of schedulers (I/O scheduling influenced by nice value?) One note on this subject: it will be nice for things like bg-fsck, but it also brings up a point that has been overlooked so far: priority propagation. As far as I am aware,

Re: Pluggable Disk Scheduler Project

2007-10-17 Thread Ulf Lilleengen
On tir, okt 16, 2007 at 04:10:37 +0200, Karsten Behrmann wrote: Hi, is anybody working on the `Pluggable Disk Scheduler Project' from the ideas page? I've been kicking the idea around in my head, but I'm probably newer to everything involved than you are, so feel free to pick it up

Re: Pluggable Disk Scheduler Project

2007-10-17 Thread Fabio Checconi
From: Karsten Behrmann [EMAIL PROTECTED] Date: Tue, Oct 16, 2007 04:10:37PM +0200 Hi, is anybody working on the `Pluggable Disk Scheduler Project' from the ideas page? I've been kicking the idea around in my head, but I'm probably newer to everything involved than you are, so feel

Re: Pluggable Disk Scheduler Project

2007-10-17 Thread Fabio Checconi
From: Ulf Lilleengen [EMAIL PROTECTED] Date: Wed, Oct 17, 2007 01:07:15PM +0200 On tir, okt 16, 2007 at 04:10:37 +0200, Karsten Behrmann wrote: Over to a more general view of it's architecture: When I looked at this project for the first time, I was under the impression that this would be

Re: Pluggable Disk Scheduler Project

2007-10-17 Thread Ulf Lilleengen
On ons, okt 17, 2007 at 02:19:07 +0200, Fabio Checconi wrote: From: Ulf Lilleengen [EMAIL PROTECTED] Date: Wed, Oct 17, 2007 01:07:15PM +0200 On tir, okt 16, 2007 at 04:10:37 +0200, Karsten Behrmann wrote: Over to a more general view of it's architecture: When I looked at this

Re: Pluggable Disk Scheduler Project

2007-10-17 Thread Luigi Rizzo
On Wed, Oct 17, 2007 at 03:09:35PM +0200, Ulf Lilleengen wrote: ... discussion on Hybrid vs. GEOM as a suitable location for ... pluggable disk schedulers However, I'd hate to see the Hybrid effort go to waste :) I was hoping some of the authors of the project would reply with their thoughts,

Re: Pluggable Disk Scheduler Project

2007-10-17 Thread Fabio Checconi
From: Ulf Lilleengen [EMAIL PROTECTED] Date: Wed, Oct 17, 2007 03:09:35PM +0200 On ons, okt 17, 2007 at 02:19:07 +0200, Fabio Checconi wrote: Maybe I've not enough experience/knowledge of the driver subsystem, [...] If you look at it, Hybrid is just a generalization of the existing bioq_*

Re: Pluggable Disk Scheduler Project

2007-10-17 Thread Bruno Tavares
On 10/17/07, Fabio Checconi [EMAIL PROTECTED] wrote: From: Ulf Lilleengen [EMAIL PROTECTED] Date: Wed, Oct 17, 2007 03:09:35PM +0200 On ons, okt 17, 2007 at 02:19:07 +0200, Fabio Checconi wrote: Maybe I've not enough experience/knowledge of the driver subsystem, [...] If you look at

Re: Pluggable Disk Scheduler Project

2007-10-16 Thread Karsten Behrmann
Hi, is anybody working on the `Pluggable Disk Scheduler Project' from the ideas page? I've been kicking the idea around in my head, but I'm probably newer to everything involved than you are, so feel free to pick it up. If you want, we can toss some ideas and code to each other, though I

Re: Pluggable Disk Scheduler Project

2007-10-12 Thread Fabio Checconi
From: Alexander Leidinger [EMAIL PROTECTED] Date: Fri, Oct 12, 2007 08:18:35AM +0200 Quoting Fabio Checconi [EMAIL PROTECTED] (from Thu, 11 Oct 2007 13:48:28 +0200): From: Ulf Lilleengen [EMAIL PROTECTED] Date: Thu, Oct 11, 2007 10:07:34AM +0200 On tor, okt 11, 2007 at 04:20:01

Re: Pluggable Disk Scheduler Project

2007-10-12 Thread Alexander Leidinger
Quoting Fabio Checconi [EMAIL PROTECTED] (from Thu, 11 Oct 2007 13:48:28 +0200): From: Ulf Lilleengen [EMAIL PROTECTED] Date: Thu, Oct 11, 2007 10:07:34AM +0200 On tor, okt 11, 2007 at 04:20:01 +0200, Fabio Checconi wrote: o What can be an interface for disk schedulers? I think the

Re: Pluggable Disk Scheduler Project

2007-10-11 Thread Ulf Lilleengen
On tor, okt 11, 2007 at 04:20:01 +0200, Fabio Checconi wrote: Hi, is anybody working on the `Pluggable Disk Scheduler Project' from the ideas page? Hi, I did look into it :) But then other projects came. To better understand how GEOM works, and how a (non work conserving) disk scheduler

Re: Pluggable Disk Scheduler Project

2007-10-11 Thread Fabio Checconi
Hi, From: Ulf Lilleengen [EMAIL PROTECTED] Date: Thu, Oct 11, 2007 10:07:34AM +0200 On tor, okt 11, 2007 at 04:20:01 +0200, Fabio Checconi wrote: o is working on disk scheduling worth at all? It is hard to say, but I'd like to run some benchmarks with this to see. Also, noted in [2],

Pluggable Disk Scheduler Project

2007-10-10 Thread Fabio Checconi
Hi, is anybody working on the `Pluggable Disk Scheduler Project' from the ideas page? To better understand how GEOM works, and how a (non work conserving) disk scheduler can fit into it, I've written a very simple, yet working, prototype: http://feanor.sssup.it/~fabio/freebsd/g_sched