svn commit: r199067 - in head/sys: amd64/amd64 i386/i386

Bjoern A. Zeeb bzeeb-lists at lists.zabbadoz.net
Thu Nov 12 11:40:07 UTC 2009


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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