Messages in this thread | | | Date | Sat, 13 Jun 2015 00:57:11 +0200 | From | Oleg Nesterov <> | Subject | Re: [PATCH 06/12] x86/mm: Enable and use the arch_pgd_init_late() method |
| |
On 06/13, Oleg Nesterov wrote: > > Afaics, we need to ensure that: > > > + if (pgd_val(*pgd_src)) > > + WRITE_ONCE(*pgd_dst, *pgd_src); > > either we notice the recent update of this PGD, or (say) the subsequent > sync_global_pgds() can miss the child.
and perhaps !pgd_none(pgd_src) will look better.
Oleg.
| |