Thanks for review. On Fri, 26 Apr 2019 at 03:32, Peter Zijlstra <[email protected]> wrote: > > On Wed, Apr 24, 2019 at 06:19:25PM +0800, Yuyang Du wrote: > > After only a quick read of these next patches; this is the one that > worries me most. > > You did mention Frederic's patches, but I'm not entirely sure you're > aware why he's doing them. He's preparing to split the softirq state > into one state per softirq vector. > > See here: > > https://lkml.kernel.org/r/[email protected] > https://lkml.kernel.org/r/[email protected] > > IOW he's going to massively explode this storage.
If I understand correctly, he is not going to. First of all, we can divide the whole usage thing into tracking and checking. Frederic's fine-grained soft vector state is applied to usage tracking, i.e., which specific vectors a lock is used or enabled. But for usage checking, which vectors are does not really matter. So, the current size of the arrays and bitmaps are good enough. Right?
