On 07.08.2018 09:26, Janosch Frank wrote: > On 06.08.2018 17:54, David Hildenbrand wrote: >> Right now we temporarily take the page table lock in gmap_pmd_op_walk() >> even though we know we won't need it (if we can never have 1mb pages >> mapped into the gmap). >> >> So let's special case this, so >> gmap_protect_range()/gmap_sync_dirty_log_pmd() will not take the lock in >> case huge pages are not allowed. > > So, let's make this a special case > >> >> gmap_protect_range() is called quite frequently for managing shadow >> page tables in vSIE environments. >> >> Signed-off-by: David Hildenbrand <david@xxxxxxxxxx> > > If you make the patch title more specific: > Reviewed-by: Janosch Frank <frankja@xxxxxxxxxxxxx> "s390/mm: optimize locking without huge pages in gmap_pmd_op_walk()" Thanks! -- Thanks, David / dhildenb -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
