On Mon, Jul 24, 2017 at 07:02:09PM -0400, Dennis Zhou wrote: > From: "Dennis Zhou (Facebook)" <dennisszhou@xxxxxxxxx> > > This patch increases the minimum allocation size of percpu memory to > 4-bytes. This change will help minimize the metadata overhead > associated with the bitmap allocator. The assumption is that most > allocations will be of objects or structs greater than 2 bytes with > integers or longs being used rather than shorts. > > The first chunk regions are now aligned with the minimum allocation > size. The reserved region is expected to be set as a multiple of the > minimum allocation size. The static region is aligned up and the delta > is removed from the dynamic size. This works because the dynamic size is > increased to be page aligned. If the static size is not minimum > allocation size aligned, then there must be a gap that is added to the > dynamic size. The dynamic size will never be smaller than the set value. > > Signed-off-by: Dennis Zhou <dennisszhou@xxxxxxxxx> Reviewed-by: Josef Bacik <jbacik@xxxxxx> Thanks, Josef -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
