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 20:43:06 +0100

 On Nov 2, 2010, at 8:31 PM, Karl-Heinz Wild wrote:
 
 >=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
 
 
 
 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
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