Ping! On 03/21/2013 07:36 AM, Simon Jeons wrote: > Hi Naoya, > On 03/21/2013 05:53 AM, Naoya Horiguchi wrote: >> 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. > Could you point out to me which code in function migration_entry_wait() > lead to return 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
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