The patch titled memory hotplug: make pages from movable zone always isolatable has been added to the -mm tree. Its filename is memory-hotplug-make-pages-from-movable-zone-always-isolatable.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: memory hotplug: make pages from movable zone always isolatable From: Shaohua Li <shaohua.li@xxxxxxxxx> Pages on movable zone have two types, MIGRATE_MOVABLE and MIGRATE_RESERVE, both them can be movable, because only movable memory allocation can get pages from movable zone. This makes pages in movable zone always be able to migrate. Signed-off-by: Shaohua Li <shaohua.li@xxxxxxxxx> Cc: Mel Gorman <mel@xxxxxxxxx> Cc: Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx> Cc: Yakui Zhao <yakui.zhao@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/page_alloc.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff -puN mm/page_alloc.c~memory-hotplug-make-pages-from-movable-zone-always-isolatable mm/page_alloc.c --- a/mm/page_alloc.c~memory-hotplug-make-pages-from-movable-zone-always-isolatable +++ a/mm/page_alloc.c @@ -4905,13 +4905,16 @@ int set_migratetype_isolate(struct page struct zone *zone; unsigned long flags; int ret = -EBUSY; + int zone_idx; zone = page_zone(page); + zone_idx = zone_idx(zone); spin_lock_irqsave(&zone->lock, flags); /* * In future, more migrate types will be able to be isolation target. */ - if (get_pageblock_migratetype(page) != MIGRATE_MOVABLE) + if (get_pageblock_migratetype(page) != MIGRATE_MOVABLE && + zone_idx != ZONE_MOVABLE) goto out; set_pageblock_migratetype(page, MIGRATE_ISOLATE); move_freepages_block(zone, page, MIGRATE_ISOLATE); _ Patches currently in -mm which might be from shaohua.li@xxxxxxxxx are linux-next.patch memory-hotplug-update-zone-pcp-at-memory-online.patch memory-hotplug-exclude-isolated-page-from-pco-page-alloc.patch memory-hotplug-make-pages-from-movable-zone-always-isolatable.patch memory-hotplug-alloc-page-from-other-node-in-memory-online.patch memory-hotplug-migrate-swap-cache-page.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html