The patch titled Subject: mm: remove the highmem zones' memmap in the highmem zone has been removed from the -mm tree. Its filename was mm-remove-the-highmem-zones-memmap-in-the-highmem-zone.patch This patch was dropped because it was merged into mainline or a subsystem tree ------------------------------------------------------ From: Zhong Hongbo <bocui107@xxxxxxxxx> Subject: mm: remove the highmem zones' memmap in the highmem zone Since 01cefaef40c4 ("mm: provide more accurate estimation of pages occupied by memmap") allocate the pages from lowmem for the highmem zones' memmap. So It is not need to reserver the memmap's for the highmem. A 2G DDR3 for the arm platform: On node 0 totalpages: 524288 free_area_init_node: node 0, pgdat 80ccd380, node_mem_map 80d38000 DMA zone: 3568 pages used for memmap DMA zone: 0 pages reserved DMA zone: 456704 pages, LIFO batch:31 HighMem zone: 528 pages used for memmap HighMem zone: 67584 pages, LIFO batch:15 On node 0 totalpages: 524288 free_area_init_node: node 0, pgdat 80cd6f40, node_mem_map 80d42000 DMA zone: 3568 pages used for memmap DMA zone: 0 pages reserved DMA zone: 456704 pages, LIFO batch:31 HighMem zone: 67584 pages, LIFO batch:15 Signed-off-by: Hongbo Zhong <hongbo.zhong@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/page_alloc.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff -puN mm/page_alloc.c~mm-remove-the-highmem-zones-memmap-in-the-highmem-zone mm/page_alloc.c --- a/mm/page_alloc.c~mm-remove-the-highmem-zones-memmap-in-the-highmem-zone +++ a/mm/page_alloc.c @@ -4937,16 +4937,18 @@ static void __paginginit free_area_init_ * and per-cpu initialisations */ memmap_pages = calc_memmap_size(size, realsize); - if (freesize >= memmap_pages) { - freesize -= memmap_pages; - if (memmap_pages) - printk(KERN_DEBUG - " %s zone: %lu pages used for memmap\n", - zone_names[j], memmap_pages); - } else - printk(KERN_WARNING - " %s zone: %lu pages exceeds freesize %lu\n", - zone_names[j], memmap_pages, freesize); + if (!is_highmem_idx(j)) { + if (freesize >= memmap_pages) { + freesize -= memmap_pages; + if (memmap_pages) + printk(KERN_DEBUG + " %s zone: %lu pages used for memmap\n", + zone_names[j], memmap_pages); + } else + printk(KERN_WARNING + " %s zone: %lu pages exceeds freesize %lu\n", + zone_names[j], memmap_pages, freesize); + } /* Account for reserved pages */ if (j == 0 && freesize > dma_reserve) { _ Patches currently in -mm which might be from bocui107@xxxxxxxxx are origin.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