2014-08-07 21:53 GMT+09:00 Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>: > Hi, > > On Thu, Aug 7, 2014 at 2:36 PM, Joonsoo Kim <js1304@xxxxxxxxx> wrote: >>> With latest mainline, I'm getting a crash during bootup on m68k/ARAnyM: >>> >>> enable_cpucache failed for radix_tree_node, error 12. >>> kernel BUG at /scratch/geert/linux/linux-m68k/mm/slab.c:1522! > >>> I bisected it to commit a640616822b2c3a8009b0600f20c4a76ea8a0025 >>> Author: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> >>> Date: Wed Aug 6 16:04:38 2014 -0700 >>> >>> slab: remove BAD_ALIEN_MAGIC > >> This patch only works for !NUMA. And if num_possible_nodes() is 1, >> then it doesn't have any effect, because alloc_alien_cache() call is always >> skipped. Is it possible !NUMA and num_possible_nodes() != 1? >> >> Could you check your config for CONFIG_NUMA and >> CONFIG_NODES_SHIFT? > > $ grep CONFIG_NUMA .config > $ grep CONFIG_NODES_SHIFT .config > CONFIG_NODES_SHIFT=3 > $ > > There are indeed multiple nodes: > > On node 0 totalpages: 3584 > free_area_init_node: node 0, pgdat 003659a4, node_mem_map 00402000 > DMA zone: 32 pages used for memmap > DMA zone: 0 pages reserved > DMA zone: 3584 pages, LIFO batch:0 > On node 1 totalpages: 65536 > free_area_init_node: node 1, pgdat 00366294, node_mem_map 00426090 > DMA zone: 576 pages used for memmap > DMA zone: 0 pages reserved > DMA zone: 65536 pages, LIFO batch:15 > >> And, could you check booting with boot param "noaliencache"? > > That fixes the boot, too. Ah... I don't know it can be possible to be !CONFIG_NUMA and CONFIG_NODES_SHIFT > 0 until now. If so, I should revert this patch. After some more investigation, I will revert this patch tomorrow and notify you. Thanks for reporting!!! :) -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>