On Mon, Mar 12, 2018 at 3:49 PM, Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> wrote: > On 12 March 2018 at 17:56, Sudeep Holla <sudeep.holla@xxxxxxx> wrote: >> Hi, >> >> I couldn't find the exact mail corresponding to the patch merged in v4.16-rc5 >> but commit 864b75f9d6b01 "mm/page_alloc: fix memmap_init_zone >> pageblock alignment" >> cause boot hang on my ARM64 platform. > > I have also noticed this problem on hi6220 Hikey - arm64. > > LKFT: linux-next: Hikey boot failed linux-next-20180308 > https://bugs.linaro.org/show_bug.cgi?id=3676 > > - Naresh > >> >> Log: >> [ 0.000000] NUMA: No NUMA configuration found >> [ 0.000000] NUMA: Faking a node at [mem >> 0x0000000000000000-0x00000009ffffffff] >> [ 0.000000] NUMA: NODE_DATA [mem 0x9fffcb480-0x9fffccf7f] >> [ 0.000000] Zone ranges: >> [ 0.000000] DMA32 [mem 0x0000000080000000-0x00000000ffffffff] >> [ 0.000000] Normal [mem 0x0000000100000000-0x00000009ffffffff] >> [ 0.000000] Movable zone start for each node >> [ 0.000000] Early memory node ranges >> [ 0.000000] node 0: [mem 0x0000000080000000-0x00000000f8f9afff] >> [ 0.000000] node 0: [mem 0x00000000f8f9b000-0x00000000f908ffff] >> [ 0.000000] node 0: [mem 0x00000000f9090000-0x00000000f914ffff] >> [ 0.000000] node 0: [mem 0x00000000f9150000-0x00000000f920ffff] >> [ 0.000000] node 0: [mem 0x00000000f9210000-0x00000000f922ffff] >> [ 0.000000] node 0: [mem 0x00000000f9230000-0x00000000f95bffff] >> [ 0.000000] node 0: [mem 0x00000000f95c0000-0x00000000fe58ffff] >> [ 0.000000] node 0: [mem 0x00000000fe590000-0x00000000fe5cffff] >> [ 0.000000] node 0: [mem 0x00000000fe5d0000-0x00000000fe5dffff] >> [ 0.000000] node 0: [mem 0x00000000fe5e0000-0x00000000fe62ffff] >> [ 0.000000] node 0: [mem 0x00000000fe630000-0x00000000feffffff] >> [ 0.000000] node 0: [mem 0x0000000880000000-0x00000009ffffffff] >> [ 0.000000] Initmem setup node 0 [mem 0x0000000080000000-0x00000009ffffffff] >> >> On Sat, Mar 3, 2018 at 1:08 AM, Daniel Vacek <neelx@xxxxxxxxxx> wrote: >>> On Sat, Mar 3, 2018 at 1:40 AM, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: >>>> >>>> This makes me wonder whether a -stable backport is really needed... >>> >>> For some machines it definitely is. Won't hurt either, IMHO. >>> >>> --nX Hmm, does it step back perhaps? Can you check if below cures the boot hang? --nX ~~~~ neelx@metal:~/nX/src/linux$ git diff diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 3d974cb2a1a1..415571120bbd 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5365,8 +5365,10 @@ void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone, * the valid region but still depends on correct page * metadata. */ - pfn = (memblock_next_valid_pfn(pfn, end_pfn) & + unsigned long next_pfn; + next_pfn = (memblock_next_valid_pfn(pfn, end_pfn) & ~(pageblock_nr_pages-1)) - 1; + pfn = max(next_pfn, pfn); #endif continue; } ~~~~