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[9fans] vga vesa works on mp pc
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ge...@plan9.bell-labs.com
Dec 8, 2009, 7:09:51 PM12/8/09
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I've just pushed out a small change to /sys/src/9/pc/realmode.c that
allows monitor=vesa to work on multiprocessor pcs without *nomp being
defined in plan9.ini (i.e., you can use all available processors [or
cores] and still use vesa mode). I've also pushed out new kernels, so
the distribution built tonight should include this fix.
allows monitor=vesa to work on multiprocessor pcs without *nomp being
defined in plan9.ini (i.e., you can use all available processors [or
cores] and still use vesa mode). I've also pushed out new kernels, so
the distribution built tonight should include this fix.
erik quanstrom
Dec 8, 2009, 8:04:15 PM12/8/09
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very nice!
- erik
Venkatesh Srinivas
Dec 8, 2009, 8:24:58 PM12/8/09
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Cool, thanks!
If I read this right, you turn off interrupts on just the CPU
executing in realmode. Is the really all that had to be done for vesa
to support MP systems?
-- vs
ge...@plan9.bell-labs.com
Dec 8, 2009, 9:33:08 PM12/8/09
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As far as I can tell, yes, that's all it took.
The old code had been turning off the old 8259 interrupt controllers
used by uniprocessors but didn't disable the lapic on mp systems.
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