Re: [Bug 41132] [BISECTED][REGRESSION] Regression with the IRQsubsystem introduced in 2.6.39 (and present in the 3.x version)

From: Thomas Gleixner
Date: Wed Nov 30 2011 - 04:42:54 EST


On Sun, 27 Nov 2011, Linus Torvalds wrote:

> Thomas, Ingo?
>
> I haven't seen any response to this one, and while clearly commit
> fa27271bc8d2 ("genirq: Fixup poll handling") was *supposed* to be a
> no-op, it isn't.
>
> The commit message says "Shorter version with the same
> functionality.", but since it causes a regression, it clearly is not
> with the same functionality at all. And I assume that Thomas doesn't
> have a machine that actually ever triggers the spurious irq issue to
> begin with, so it probably was never tested.
>
> In short, it really sounds like this should just be reverted, since
> the code clearly doesn't do what the commit message claims it does.
>
> Comments?

Yes, Edward tracked it down already. One part of the fix is already in
your tree commit 52553ddffad. The second half is in my queue.

See below. Thanks,

tglx

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