On Thu, 15 Nov 2012, Andrew Morton wrote: > From: Andrew Morton <[email protected]> > Subject: revert "mm: fix-up zone present pages" > > Revert > > commit 7f1290f2f2a4d2c3f1b7ce8e87256e052ca23125 > Author: Jianguo Wu <[email protected]> > AuthorDate: Mon Oct 8 16:33:06 2012 -0700 > Commit: Linus Torvalds <[email protected]> > CommitDate: Tue Oct 9 16:22:54 2012 +0900 > > mm: fix-up zone present pages > > > That patch tried to fix a issue when calculating zone->present_pages, but > it caused a regression on 32bit systems with HIGHMEM. With that > changeset, reset_zone_present_pages() resets all zone->present_pages to > zero, and fixup_zone_present_pages() is called to recalculate > zone->present_pages when the boot allocator frees core memory pages into > buddy allocator. Because highmem pages are not freed by bootmem > allocator, all highmem zones' present_pages becomes zero. > > Various options for improving the situation are being discussed but for > now, let's return to the 3.6 code. > > Cc: Jianguo Wu <[email protected]> > Cc: Jiang Liu <[email protected]> > Cc: Petr Tesarik <[email protected]> > Cc: "Luck, Tony" <[email protected]> > Cc: Mel Gorman <[email protected]> > Cc: Yinghai Lu <[email protected]> > Cc: Minchan Kim <[email protected]> > Cc: Johannes Weiner <[email protected]> > Cc: David Rientjes <[email protected]> > Signed-off-by: Andrew Morton <[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/
