On Mon, 9 Nov 2009, Jun Kuriyama wrote:
Hi,
Author: kuriyama
Date: Mon Nov 9 02:54:16 2009
New Revision: 199067
URL: http://svn.freebsd.org/changeset/base/199067
Log:
- Add hw.clflush_disable loader tunable to avoid panic (trap 9) at
map_invalidate_cache_range() even if CPU is not Intel.
- This tunable can be set to -1 (default), 0 and 1. -1 is same as
current behavior, which automatically disable CLFLUSH on Intel CPUs
without CPUID_SS (should be occured on Xen only). You can specify 1
when this panic happened on non-Intel CPUs (such as AMD's). Because
disabling CLFLUSH may reduce performance, you can try with setting 0
on Intel CPUs without SS to use CLFLUSH feature.
I wasn't able to boot dual Xeon machines anymore.
svn merge -c -199067 $FBDSVN/head/sys sys
fixed this problem.
--
Bjoern A. Zeeb It will not break if you know what you are doing.
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