i386/151896: increasing kmem_size in loader.conf panic

[Karl-Heinz Wild]

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

From: Karl-Heinz Wild <kh.wild at barga.com>
To: Remko Lodder <remko at elvandar.org>
Cc: freebsd-gnats-submit at FreeBSD.org
Subject: Re: i386/151896: increasing kmem_size in loader.conf panic
Date: Tue, 2 Nov 2010 20:51:33 +0100

 Hi Remko
 
 Thank you for answering.
 Good and worse as well :)
 
 Best regards
 
 On 02.11.2010, at 20:43, Remko Lodder wrote:
 
 >=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
 
 
 Mit freundlichen Gr=FCssen
 
 ---
 Karl-Heinz Wild
 kh.wild at barga.com
 
 barga.com - technische Dienstleistungen GmbH
 A-6805 Feldkirch
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