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 <vba...@suse.cz> > Cc: Joonsoo Kim <iamjoonsoo....@lge.com> > Cc: Minchan Kim <minc...@kernel.org> > Cc: Michal Nazarewicz <min...@mina86.com> > Cc: Laura Abbott <lau...@codeaurora.org> > Cc: Naoya Horiguchi <n-horigu...@ah.jp.nec.com> > Cc: Kirill A. Shutemov <kirill.shute...@linux.intel.com> > Cc: Mel Gorman <mgor...@suse.de> > Cc: Johannes Weiner <han...@cmpxchg.org>
Acked-by: David Rientjes <rient...@google.com> -- 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/
