On Wed, Mar 20, 2013 at 07:57:32AM +0800, Simon Jeons wrote: > Hi Naoya, > On 02/22/2013 03:41 AM, Naoya Horiguchi wrote: > >When we have a page fault for the address which is backed by a hugepage > >under migration, the kernel can't wait correctly until the migration > >finishes. This is because pte_offset_map_lock() can't get a correct > > It seems that current hugetlb_fault still wait hugetlb page under > migration, how can it work without lock 2MB memory?
Hugetlb_fault() does call migration_entry_wait(), but returns immediately. So page fault happens over and over again until the migration completes. IOW, migration_entry_wait() is now broken for hugepage and doesn't work as expected. Thanks, Naoya -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/