Subject: Re: Limiting disk I/O?
To: Thor Lancelot Simon <>
From: Jukka Marin <>
List: tech-kern
Date: 11/13/2007 08:26:46
On Mon, Nov 12, 2007 at 06:50:29PM -0500, Thor Lancelot Simon wrote:
> > With softdep, but without the patch, pkgsrc extract takes less than 14
> > seconds in case syncer does not kick in during the operation.
> Yes, but nothing is written to the disk!  A reasonable comparison would be
> how long softdep extract followed by "sync" takes, without the patch.

That's true.  However, both times are important in real life - as soon as
tar exits, I can start building the source (no matter if all the data is
on the disk or not).  (Of course, extracting pkgsrc is just one special case,
but it's something I do every now and then and seems to bring up some I/O
problems, so I'm using it as a test.)