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SubjectRe: [rfc] "fair" rw spinlocks
Andi Kleen <> writes:

> (Eric W. Biederman) writes:
>> "Paul E. McKenney" <> writes:
>>> Is it required that all of the processes see the signal before the
>>> corresponding interrupt handler returns? (My guess is "no", which
>>> enables a trick or two, but thought I should ask.)
>> Not that I recall. I think it is just an I/O completed signal.
> Wasn't there the sysrq SAK too? That one definitely would need
> to be careful about synchronicity.

SAK from sysrq is done through schedule work, I seem to recall the
locking being impossible otherwise. There is also send_sig_all and a
few others from sysrq. I expect we could legitimately make them
schedule_work as well if needed.


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