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SubjectRe: alpha bug in signal handling
On Wed, Dec 05, 2001 at 03:23:04AM -0800, David S. Miller wrote:
> I don't understand why this is even necessary.
>
> What if the interrupt comes in on another processor. How does this
> return from trap behavior avoid that interrupt modifying the signal
> and/or scheduling state wrt. the current cpu's task?

It doesn't. But it also prevents the IPI from being recognized
until we are back in userland. Apparently DMT had a test case
that failed without disabling interrupts; I didn't see it myself.


r~
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