Re: [PATCH] powerpc: During context switch, check before setting mm_cpumask
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: 2016-10-03 23:58:28
On Tue, 2016-10-04 at 10:25 +1100, Balbir Singh wrote:
I think this makes sense, in fact I think in the longer term we can even use __set_bit() reorder-able version since we have a sync coming out of schedule(). The read side for TLB flush can use a RMB
No, that wouldn't be atomic vs. other threads accessing the same bitmap. Ben.