On Mon, 25 Feb 2019, dennis@xxxxxxxxxx wrote: > > @@ -67,7 +67,7 @@ static struct pcpu_chunk *pcpu_create_chunk(gfp_t gfp) > > pcpu_set_page_chunk(nth_page(pages, i), chunk); > > > > chunk->data = pages; > > - chunk->base_addr = page_address(pages) - pcpu_group_offsets[0]; > > + chunk->base_addr = page_address(pages); > > > > spin_lock_irqsave(&pcpu_lock, flags); > > pcpu_chunk_populated(chunk, 0, nr_pages, false); > > -- > > 2.16.4 > > > > While I do think you're right, creating a chunk is not a part of the > critical path and subtracting 0 is incredibly minor overhead. So I'd > rather keep the code as is to maintain consistency between percpu-vm.c > and percpu-km.c. Well it is confusing if there the expression is there but never used. It is clearer with the patch.
