On Sat, 5 Sep 2015 14:04:57 +0200
Ingo Molnar [off-list ref] wrote:

 

So why not do:

	lock(B);
	if (!trylock(A)) {
		unlock(B);
		lock(A);
		lock(B);
	}

?

Or, if this can be done, why didn't we do:

	lock(A);
	lock(B);

to begin with?

i.e. I'm not sure the problem is properly specified.

Yeah, this is actually the solution I came up with before. I misread
what Thomas wrote. His is slightly different.

-- Steve