Subject: Re: i/o scheduling (was Re: NEW_BUFQ_STRATEGY)
To: None <>
From: Jason Thorpe <>
List: tech-kern
Date: 12/17/2003 09:06:21
Content-Transfer-Encoding: 7bit
Content-Type: text/plain; charset=US-ASCII; format=flowed

On Dec 16, 2003, at 9:36 PM, Thor Lancelot Simon wrote:

> I must not understand what you're saying.  You say "synchronous read
> requests can happen on the delayed-writed page and we have no way to
> look up the corresponding buf from a page".  That suggests to me that
> the read will return the wrong data; am I incorrect?  If not, what is
> the problem, exactly, if synchronous read requests happen on pages
> that have delayed writes in the I/O queues?

I'm not sure what all the hubub is all about ... don't all file data 
requests go through UBC in any case?

         -- Jason R. Thorpe <>

content-type: application/pgp-signature; x-mac-type=70674453;
content-description: This is a digitally signed message part
content-disposition: inline; filename=PGP.sig
content-transfer-encoding: 7bit

Version: GnuPG v1.2.3 (Darwin)