[CC Pavel]
On Fri 16-02-18 14:37:26, 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 could get lost.
Could you be more specific please?
Avoid this problem by not deferring struct page initialization when running as Xen pv guest.
Cc: stable@vger.kernel.org #4.15
Fixes: f7f99100d8d9 ("mm: stop zeroing memory during allocation in vmemmap")
please
Signed-off-by: Juergen Gross jgross@suse.com
mm/page_alloc.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 81e18ceef579..681d504b9a40 100644 --- 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 < pgdat_end_pfn(pgdat)) return true;
- /* Xen PV domains need page structures early */
- if (xen_pv_domain())
return true;-- 2.13.6