On 25/06/10 07:56 AM, Anup pemmaiah wrote:
*Hi,
I am working on Opensolaris build128 (64bit)on a Intel system with 6GB
of memory. Out of
that, I would like to use first 1GB for solaris.
Why?
I have set
physmem=0x40000 as the
boot argument.
Not accepted as a boot argument. See boot(1m)
Kernel panics due to memory corruption. When I started debugging
in kmdb, I see most of the virtual addresses that are used in kernel
heap being
mapped to physical memory below 1GB, but some virtual addresses in the
kernel
heap are mapped to physical memory outside 1GB.
For Eg. Kernel panic'd for memory corruption at ffffff00ca197100.
[0]> ffffff00ca197100 ::vtop
virtual ffffff00ca197100 mapped to physical 40001100
When I disabled segkpm, I noticed that the above virtual address
was mapped to physical memory below 1GB, but there were still
nearby virtual addresses mapped to physical memory above 1GB (**40000000)**.
Was curious, along with physmem, should I be setting any other flags
to guarantee that kernel will not use physical memory outside first 1GB.
Any comments will be greatly appreciated.
There are comments here:
http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/i86pc/os/startup.c#190
which you should read.
What I'm very curious to know, however, is what problem
you have which you think will be solved by doing what
you describe above?
James C. McPherson
--
Senior Software Engineer, Solaris
Oracle
http://www.jmcp.homeunix.com/blog
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