i386/151896: increasing kmem_size in loader.conf panic

[Remko Lodder]

The following reply was made to PR i386/151896; it has been noted by GNATS.

From: Remko Lodder <remko at elvandar.org>
To: Karl-Heinz Wild <kh.wild at barga.com>
Cc: freebsd-gnats-submit at FreeBSD.org
Subject: Re: i386/151896: increasing kmem_size in loader.conf panic
Date: Tue, 2 Nov 2010 21:11:26 +0100

 Hello,
 
 Yes.. I cannot make it better :-), if you have access to the machine and =
 it isn't production or can have some downtime, you should backup the
 data on it, and reinstall the system or to be quicker overwrite the base =
 system with amd64 binaries, you should however rebuild your ports
 and re-import the data you backupped (exported). Especially with =
 databases and stuff, because 'replacing' that wont work.
 
 Cheerio
 remko
 
 On Nov 2, 2010, at 8:51 PM, Karl-Heinz Wild wrote:
 
 > Hi Remko
 >=20
 > Thank you for answering.
 > Good and worse as well :)
 >=20
 > Best regards
 >=20
 > On 02.11.2010, at 20:43, Remko Lodder wrote:
 >=20
 >>=20
 >> On Nov 2, 2010, at 8:31 PM, Karl-Heinz Wild wrote:
 >>=20
 >>>=20
 >>>> Number:         151896
 >>>> Category:       i386
 >>>> Synopsis:       increasing kmem_size in loader.conf panic
 >>>> Confidential:   no
 >>>> Severity:       serious
 >>>> Priority:       high
 >>>> Responsible:    freebsd-i386
 >>>> State:          open
 >>>> Quarter:       =20
 >>>> Keywords:      =20
 >>>> Date-Required:
 >>>> Class:          sw-bug
 >>>> Submitter-Id:   current-users
 >>>> Arrival-Date:   Tue Nov 02 19:40:11 UTC 2010
 >>>> Closed-Date:
 >>>> Last-Modified:
 >>>> Originator:     Karl-Heinz Wild
 >>>> Release:        8.1, -current
 >>>> Organization:
 >>> barga.com
 >>>> Environment:
 >>> FreeBSD pool.barga.com 9.0-CURRENT FreeBSD 9.0-CURRENT #2: Sun Oct =
 31 16:21:25 CET 2010     root at pool.barga.com:/usr/obj/usr/src/sys/PAE  =
 i386
 >>>> Description:
 >>> We are running a Intel Xeon E5520 @ 2.27 machine with an 3ware =
 controller do serve 5.7 TG storage ofer zfs.
 >>>=20
 >>> When running the server with the given 16 GB Ram we are unable do =
 increase inside the loader.conf the settings vm.kmem_size and =
 vm.kmem_size_max over 320MB.
 >>>=20
 >>> After trying lots of values change the memory banks because of a =
 possible ram error without success.
 >>> Then we removed 8GB and afterwards it was possible to extend the =
 kmem_size to 512MB.
 >>>=20
 >>>=20
 >>>> How-To-Repeat:
 >>> Running -Current from 29.Oct 2010 with PAE on a system with 16GB =
 Memory, an 3ware Raid controller and PAE config: KVM_PAGES 512
 >>>=20
 >>> loader.conf:
 >>> vm.kmem_size=3D"512M"
 >>>=20
 >>=20
 >>=20
 >>=20
 >> Yes well, i386 is not designed to handle more then 4gb of memory, =
 while the PAE set does allow for some more memory you _need_ amd64 to =
 get 16gb available and addressable.
 >> I honestly do not think you can ever get that far with i386 (not even =
 with PAE).
 >>=20
 >> --=20
 >> /"\   Best regards,                        | remko at FreeBSD.org
 >> \ /   Remko Lodder                      |
 >> X    http://www.evilcoder.org/    | Quis custodiet ipsos custodes
 >> / \   ASCII Ribbon Campaign    | Against HTML Mail and News
 >>=20
 >>=20
 >>=20
 >>=20
 >=20
 >=20
 > Mit freundlichen Gr=FCssen
 >=20
 > ---
 > Karl-Heinz Wild
 > kh.wild at barga.com
 >=20
 > barga.com - technische Dienstleistungen GmbH
 > A-6805 Feldkirch
 > Leusbuendtweg 49a
 >=20
 >=20
 >=20
 >=20
 
 --=20
 /"\   Best regards,                        | remko at FreeBSD.org
 \ /   Remko Lodder                      |
 X    http://www.evilcoder.org/    | Quis custodiet ipsos custodes
 / \   ASCII Ribbon Campaign    | Against HTML Mail and News