On Tue, Apr 03, 2018 at 07:52:25AM +0200, Martin Schwidefsky wrote: > On Thu, 29 Mar 2018 20:08:36 +0200 > Peter Zijlstra <pet...@infradead.org> wrote: > > > On Thu, Mar 29, 2018 at 04:53:43PM +0200, Martin Schwidefsky wrote: > > > The lowcore optimization for softirq_pending field is not really needed, > > > just nice to have. But if there is a strong reason to make a common > > > definition for it we can certainly do that. > > > > A slightly related question; would it make sense to move all kernel > > static per-cpu stuff into lowcore, or is that asking for too much > > trickery? > > The space in lowcore is quite limited, for zArch the structure is 8K with > many pre-defined fields. I fear that putting all of the static per-cpu > stuff in there is too much. > > So far I used the lowcore as optimization for selected per-cpu fields > which are performance relevant.
Fair enough; and yes 8k isn't much. Thanks for the info.
