Re: [Xen-devel] [RESEND v2] mm: don't defer struct page initialization for Xen pv guests

Reviewed-by: Pavel Tatashin This is unique for Xen, so this particular issue won't effect other configurations. I am going to investigate if there is a way to re-enable deferred page initialization on xen guests. Pavel On 02/16/2018 03:40 PM, Andrew Morton wrote:

Re: [Xen-devel] [RESEND v2] mm: don't defer struct page initialization for Xen pv guests

On Fri, 16 Feb 2018 16:41:01 +0100 Juergen Gross wrote: > --- a/mm/page_alloc.c > +++ b/mm/page_alloc.c > @@ -347,6 +347,9 @@ static inline bool update_defer_init(pg_data_t *pgdat, > /* Always populate low zones for address-constrained allocations */ > if (zone_end <

Re: [Xen-devel] [RESEND v2] mm: don't defer struct page initialization for Xen pv guests

On Fri, 16 Feb 2018 16:41:01 +0100 Juergen Gross wrote: > Commit f7f99100d8d95dbcf09e0216a143211e79418b9f ("mm: stop zeroing > memory during allocation in vmemmap") broke Xen pv domains in some > configurations, as the "Pinned" information in struct page of early > page tables

[Xen-devel] [RESEND v2] mm: don't defer struct page initialization for Xen pv guests

Commit f7f99100d8d95dbcf09e0216a143211e79418b9f ("mm: stop zeroing memory during allocation in vmemmap") broke Xen pv domains in some configurations, as the "Pinned" information in struct page of early page tables could get lost. This will lead to the kernel trying to write directly into the page