Hi Keir,
Thanks for the heads-up. I'll certainly give it a try.
As this hang appears during boot, it's not clear how much reducing
spinlock contention will help. At times, it's not even clear that
I make it into __start_xen. Certainly, when I get a hang, I
never make it out of __start_xen/init_e820/print_e820_memory_map.
As it often stops in the middle of print_e820_memory_map
output, that's what lead to the suspicion about serial lines.
Clearly, though, it's merely a suspicion/guess.
Thanks,
-b
Keir Fraser wrote:
In unstable changeset 9419 I've reduced contention for the serial-line
spinlock, particularly in the serial ISR. It certainly has cleaned up
some weird behaviour that I was able to reproduce when I hit the
serial line hard from within Xen itself. It's not clear it'll fix your
problems, but worth testing.
-- Keir
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Ben Thomas Virtual Iron Software
bthomas@xxxxxxxxxxxxxxx Tower 1, Floor 2
978-849-1214 900 Chelmsford Street
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