On Mon, 2015-01-19 at 15:42 +0000, Jan Beulich wrote: > ... to reduce padding holes. > > I also wonder whether having independent spin locks side by side is > really a good thing cache-line-bouncing-wise.
AIUI the general wisdom is to put each spinlock next to the data it protects (I suppose on the assumption that after acquiring the lock you will next touch that data). Is the problem is that the domain_lock doesn't actually protect anything in this struct since it is a more umbrella lock, so there is nothing to put next to it? You could move either it or the page lock below all the page counts stuff. Ian. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
