On Tue, 21 Jul 2015, Vlastimil Babka wrote: > The pair of get/set_freepage_migratetype() functions are used to cache > pageblock migratetype for a page put on a pcplist, so that it does not have > to be retrieved again when the page is put on a free list (e.g. when pcplists > become full). Historically it was also assumed that the value is accurate for > pages on freelists (as the functions' names unfortunately suggest), but that > cannot be guaranteed without affecting various allocator fast paths. It is in > fact not needed and all such uses have been removed. > > The last remaining (but pointless) usage related to pages of freelists is in > move_freepages(), which this patch removes. > > To prevent further confusion, rename the functions to > get/set_pcppage_migratetype() and expand their description. Since all the > users are now in mm/page_alloc.c, move the functions there from the shared > header. > > Signed-off-by: Vlastimil Babka <[email protected]> > Cc: Joonsoo Kim <[email protected]> > Cc: Minchan Kim <[email protected]> > Cc: Michal Nazarewicz <[email protected]> > Cc: Laura Abbott <[email protected]> > Cc: Naoya Horiguchi <[email protected]> > Cc: Kirill A. Shutemov <[email protected]> > Cc: Mel Gorman <[email protected]> > Cc: Johannes Weiner <[email protected]>
Acked-by: David Rientjes <[email protected]> -- 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/
