On Thu, 1 Jun 2006, Johannes Schindelin wrote:
with my qemu-0.8.0 I noticed that Linux 2.6.15 runs only with the appended
patch.
Which patch?
Brilliant me. Sorry, I forgot the patch. I don't have it handy here at
home, but it's easily described: in <asm-mips/hazards.h>, it made
irq_enable_hazard emit 3 NOPs just as irq_disable_hazard. I stumbeled
over this as my kernel hung im sched.c:wait_for_completionn(). Turned
out that schedule() wasn't called properly which went away with the
NOPs.
Again, I didn't really investigate too much, but I reckoned if the
NOPS are needed upon irq_disable_hazard, they're needed for
irq_enable_hazard as well, since CP0 status is write modified in both
situations.
--
Marius Groeger <[EMAIL PROTECTED]>
SYSGO AG Embedded and Real-Time Software
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