On 14/05/15 18:00, Julien Grall wrote: > Only use the first 4KB of the page to store the events channel info. It > means that we will wast 60KB every time we allocate page for: > * control block: a page is allocating per CPU > * event array: a page is allocating everytime we need to expand it > > I think we can reduce the memory waste for the 2 areas by: > > * control block: sharing between multiple vCPUs. Although it will > require some bookkeeping in order to not free the page when the CPU > goes offline and the other CPUs sharing the page still there > > * event array: always extend the array event by 64K (i.e 16 4K > chunk). That would require more care when we fail to expand the > event channel.
I think you want an xen_alloc_page_for_xen() or similar to allocate a 4 KiB size/aligned block. But as-is: Reviewed-by: David Vrabel <[email protected]> David -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
