On Thu, Nov 06 2014, Weijie Yang <[email protected]> wrote: > In the undo path of start_isolate_page_range(), we need to check > the pfn validity before access its page, or it will trigger an > addressing exception if there is hole in the zone. > > Signed-off-by: Weijie Yang <[email protected]>
Acked-by: Michal Nazarewicz <[email protected]> > --- > mm/page_isolation.c | 7 +++++-- > 1 files changed, 5 insertions(+), 2 deletions(-) > > diff --git a/mm/page_isolation.c b/mm/page_isolation.c > index d1473b2..3ddc8b3 100644 > --- a/mm/page_isolation.c > +++ b/mm/page_isolation.c > @@ -137,8 +137,11 @@ int start_isolate_page_range(unsigned long start_pfn, > unsigned long end_pfn, > undo: > for (pfn = start_pfn; > pfn < undo_pfn; > - pfn += pageblock_nr_pages) > - unset_migratetype_isolate(pfn_to_page(pfn), migratetype); > + pfn += pageblock_nr_pages) { > + page = __first_valid_page(pfn, pageblock_nr_pages); > + if (page) > + unset_migratetype_isolate(page, migratetype); > + } > > return -EBUSY; > } > -- > 1.7.0.4 > > -- Best regards, _ _ .o. | Liege of Serenely Enlightened Majesty of o' \,=./ `o ..o | Computer Science, Michał “mina86” Nazarewicz (o o) ooo +--<[email protected]>--<xmpp:[email protected]>--ooO--(_)--Ooo-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
