On Mon, 26 Feb 2007, Jiri Slaby wrote:
>
> Ok, this commit is the culprit:
> Commit: 2ff2d3d74705d34ab71b21f54634fcf50d57bdd5
> Author: Stephane Eranian <[EMAIL PROTECTED]> Tue, 13 Feb 2007 13:26:22 +0100
>
> [PATCH] i386: add idle notifier
Interesting. It doesn't touch floppy at all, but it *does* seem to play
around with irq state.
In particular, the floppy uses IRQF_DISABLED (which means that it doesn't
want interrupts enabled when in the irq handler), and I get the feeling
that the poll_idle() stuff made that not work.
That said, the only thing that *really* seems to change (as far as a
floopy driver could notice) is the added "exit_idle()" in the do_IRQ()
sequence, and I'm not seeing that one enabling interrupts.
But the idle sequence definitely does (ie now we disable/enable interrupts
in cpu_idle(). I'm not seeing why that should matter, though.
Stephane, any ideas?
Linus
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