Ingo Molnar <[email protected]> wrote:
> btw., would be nice to convert it to genirq (and irqchips) too =B-) That
> would solve the kind of disable_irq_lockdep() breakage that was reported
> recently.
I can think of reasons for not using that stuff also.
(1) Passing "struct pt_regs *regs" around is a complete waste of resources on
FRV. It's in GR28 at all times and can thus be accessed directly.
(2) All the little operations functions cause unnecessary jumping, jumps that
icache lookahead can't predict because they're register-indirect.
(3) ACK'ing and controlling interrupts has to be done by groups.
(4) No account is taken of interrupt priority.
(5) The FRV CPU doesn't tell me which IRQ source fired. Much of the code
I've got is stuff to try and work it out. I could just blindly poll all
the sources attached to a particular interrupt level, but that seems
somehow less efficient.
David
BTW, have you looked at my patch to fix lockdep yet?
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
