Re: [Xen-devel] [PATCH v4 1/2] xen/link: Introduce .bss.percpu.page_aligned

2019-08-09 Thread Jan Beulich
On 09.08.2019 15:42, Andrew Cooper wrote: On 09/08/2019 13:32, Jan Beulich wrote: Insert explicit alignment such that the result is safe even with objects shorter than a page in length.  The POINTER_ALIGN for __bss_end is to cover the lack of SMP_CACHE_BYTES alignment, as the loops which zero th

Re: [Xen-devel] [PATCH v4 1/2] xen/link: Introduce .bss.percpu.page_aligned

2019-08-09 Thread Andrew Cooper
On 09/08/2019 13:32, Jan Beulich wrote: > Insert explicit alignment such that the result is safe even with objects > shorter than a page in length.  The POINTER_ALIGN for __bss_end is to > cover > the lack of SMP_CACHE_BYTES alignment, as the loops which zero the BSS > use > pointer-sized stores on