On Sunday 15 January 2006 22:39, Jeff Dike wrote:
> This patch implements soft interrupts. Interrupt enabling and
> disabling no longer map to sigprocmask. Rather, a flag is set
> indicating whether interrupts may be handled. If a signal comes in
> and interrupts are marked as OK, then it is handled normally. If
> interrupts are marked as off, then the signal handler simply returns
> after noting that a signal needs handling. When interrupts are enabled
> later on, this pending signals flag is checked, and the IRQ handlers
> are called at that point.
~25 %? Good! Which is delay vs. host?
A curiosity - did you look at the similar code in Ingo Molnar's VCPU patch? I
never found the time to split it out and compare differencies. I just
remember it using assembler inserts for (maybe atomic) bitmask manipulations.
--
Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!".
Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894)
http://www.user-mode-linux.org/~blaisorblade
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