kern/178997: Heavy disk I/O may hang system

[Klaus Weber]

The following reply was made to PR kern/178997; it has been noted by GNATS.

From: Klaus Weber <fbsd-bugs-2013-1 at unix-admin.de>
To: Bruce Evans <brde at optusnet.com.au>
Cc: Klaus Weber <fbsd-bugs-2013-1 at unix-admin.de>,
	freebsd-gnats-submit at FreeBSD.org
Subject: Re: kern/178997: Heavy disk I/O may hang system
Date: Mon, 10 Jun 2013 18:38:19 +0200

 Just a quick reply while I am away from the system.
 
 On Mon, Jun 10, 2013 at 11:00:29AM +1000, Bruce Evans wrote:
 > o Everything seems to be working as well as intended (not very well)
 >   except in bufdaemon and friends.  Perhaps it is already fixed there.
 >   I forgot to check which version of FreeBSD you are using.  You may
 >   be missing some important fixes.  There were some by kib@ a few
 >   months ago, and some by jeff@ after this thread started.  I don't
 >   run any version of FreeBSD new enough to have these, and the version
 >   that I run also doesn't seem to have any serious bugs in bufdaemon.
 >   It just works mediocrely.
 
 ~All tests were done with 9-STABLE from early May. I also tested with
 10-CURRENT kernel, downloaded from an ftp mirror on May 5th,
 2013. This kernel showed the same behavior, so I did all further
 testing with the 9-STABLE version.
 
 I will update my sources to 9-STABLE first thing next weekend, and
 will also re-test with an up-to-date CURRENT kernel.
 
 Klaus