* Pavel Tatashin <pasha.tatashin@xxxxxxxxxx> wrote: > During boot we poison struct page memory in order to ensure that no one is > accessing this memory until the struct pages are initialized in > __init_single_page(). > > This patch adds more scrutiny to this checking by making sure that flags > do not equal the poison pattern when they are accessed. The pattern is all > ones. > > Since node id is also stored in struct page, and may be accessed quite > early, we add this enforcement into page_to_nid() function as well. > Note, this is applicable only when NODE_NOT_IN_PAGE_FLAGS=n > > Signed-off-by: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx> > Reviewed-by: Ingo Molnar <mingo@xxxxxxxxxx> > Acked-by: Michal Hocko <mhocko@xxxxxxxx> Please always start patch titles with a verb, i.e.: mm: Add uninitialized struct page poisoning sanity check or so. Thanks, Ingo -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
