Subject: Re: Coallesce disk I/O (was RE: Interactive responsiveness under heavy I/O load)
To: Gordon Waidhofer <>
From: Alfred Perlstein <>
List: tech-kern
Date: 01/26/2004 15:35:23
* Gordon Waidhofer <> [040126 15:19] wrote:
> I've only given it a cursory look. I want
> to find a way to add coallescing without
> tearing-up the whole struct buf subsystem.
> It works best if done very near the device
> driver. I'm hoping to find a way for the
> device drivers to do some sort of "just in time"
> coallescing. That way, the struct bufs and
> queues would be fine the way they are.
> No new data structures need be added or maintained.
> It'll be the later part of the year before
> I can really wade in.

See FreeBSD's vfs_cluster.c.

- Alfred Perlstein
- Research Engineering Development Inc.
- email: cell: 408-480-4684