Re: arm32: panic in move_freepages (Was [PATCH v2 0/4] arm64: drop pfn_valid_within() and simplify pfn_valid())
From: Kefeng Wang
Date: Mon Apr 26 2021 - 11:26:50 EST
On 2021/4/26 13:20, Mike Rapoport wrote:
On Sun, Apr 25, 2021 at 03:51:56PM +0800, Kefeng Wang wrote:
On 2021/4/25 15:19, Mike Rapoport wrote:
On Fri, Apr 23, 2021 at 04:11:16PM +0800, Kefeng Wang wrote:
I tested this patchset(plus arm32 change, like arm64 does) based on lts
5.10，add
some debug log, the useful info shows below, if we enable HOLES_IN_ZONE, no
panic,
any idea, thanks.
Are there any changes on top of 5.10 except for pfn_valid() patch?
Do you see this panic on 5.10 without the changes?
Yes, there are some BSP support for arm board based on 5.10, with or without
your patch will get same panic, the panic pfn=de600 in the range of
[dcc00,de00]
which is freed by free_memmap, start_pfn = dcc00, dcc00000 end_pfn = de700,
de700000
we see the PC is at PageLRU, same reason like arm64 panic log,
"PageBuddy in move_freepages returns false
Then we call PageLRU, the macro calls PF_HEAD which is compound_page()
compound_page reads page->compound_head, it is 0xffffffffffffffff, so it
resturns 0xfffffffffffffffe - and accessing this address causes crash"
Can you see stack backtrace beyond move_freepages_block?
I do some oom test, so the log is about memory allocate,
[<c02383c8>] (move_freepages_block) from [<c0238668>]
(steal_suitable_fallback+0x174/0x1f4)
[<c0238668>] (steal_suitable_fallback) from [<c023999c>] (get_page_from_freelist+0x490/0x9a4)
Hmm, this is called with a page from free list, having a page from a freed
part of the memory map passed to steal_suitable_fallback() means that there
is an issue with creation of the free list.
Can you please add "memblock=debug" to the kernel command line and post the
log?
Here is the log,
CPU: ARMv7 Processor [413fc090] revision 0 (ARMv7), cr=1ac5387d
CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
OF: fdt: Machine model: HISI-CA9
memblock_add: [0x80a00000-0x855fffff] early_init_dt_scan_memory+0x11c/0x188
memblock_add: [0x86a00000-0x87dfffff] early_init_dt_scan_memory+0x11c/0x188
memblock_add: [0x8bd00000-0x8c4fffff] early_init_dt_scan_memory+0x11c/0x188
memblock_add: [0x8e300000-0x8ecfffff] early_init_dt_scan_memory+0x11c/0x188
memblock_add: [0x90d00000-0xbfffffff] early_init_dt_scan_memory+0x11c/0x188
memblock_add: [0xcc000000-0xdc9fffff] early_init_dt_scan_memory+0x11c/0x188
memblock_add: [0xe0800000-0xe0bfffff] early_init_dt_scan_memory+0x11c/0x188
memblock_add: [0xf5300000-0xf5bfffff] early_init_dt_scan_memory+0x11c/0x188
memblock_add: [0xf5c00000-0xf6ffffff] early_init_dt_scan_memory+0x11c/0x188
memblock_add: [0xfe100000-0xfebfffff] early_init_dt_scan_memory+0x11c/0x188
memblock_add: [0xfec00000-0xffffffff] early_init_dt_scan_memory+0x11c/0x188
memblock_add: [0xde700000-0xde9fffff] early_init_dt_scan_memory+0x11c/0x188
memblock_add: [0xf4b00000-0xf52fffff] early_init_dt_scan_memory+0x11c/0x188
memblock_add: [0xfda00000-0xfe0fffff] early_init_dt_scan_memory+0x11c/0x188
memblock_reserve: [0x80a01000-0x80a02d2e] setup_arch+0x68/0x5c4
Malformed early option 'vecpage_wrprotect'
Memory policy: Data cache writealloc
memblock_reserve: [0x80b00000-0x812e8057] arm_memblock_init+0x34/0x14c
memblock_reserve: [0x83000000-0x84ffffff] arm_memblock_init+0x100/0x14c
memblock_reserve: [0x80a04000-0x80a07fff] arm_memblock_init+0xa0/0x14c
memblock_reserve: [0x80a00000-0x80a02fff] hisi_mem_reserve+0x14/0x30
MEMBLOCK configuration:
memory size = 0x4c0fffff reserved size = 0x027ef058
memory.cnt = 0xa
memory[0x0] [0x80a00000-0x855fffff], 0x04c00000 bytes flags: 0x0
memory[0x1] [0x86a00000-0x87dfffff], 0x01400000 bytes flags: 0x0
memory[0x2] [0x8bd00000-0x8c4fffff], 0x00800000 bytes flags: 0x0
memory[0x3] [0x8e300000-0x8ecfffff], 0x00a00000 bytes flags: 0x0
memory[0x4] [0x90d00000-0xbfffffff], 0x2f300000 bytes flags: 0x0
memory[0x5] [0xcc000000-0xdc9fffff], 0x10a00000 bytes flags: 0x0
memory[0x6] [0xde700000-0xde9fffff], 0x00300000 bytes flags: 0x0
memory[0x7] [0xe0800000-0xe0bfffff], 0x00400000 bytes flags: 0x0
memory[0x8] [0xf4b00000-0xf6ffffff], 0x02500000 bytes flags: 0x0
memory[0x9] [0xfda00000-0xfffffffe], 0x025fffff bytes flags: 0x0
reserved.cnt = 0x4
reserved[0x0] [0x80a00000-0x80a02fff], 0x00003000 bytes flags: 0x0
reserved[0x1] [0x80a04000-0x80a07fff], 0x00004000 bytes flags: 0x0
reserved[0x2] [0x80b00000-0x812e8057], 0x007e8058 bytes flags: 0x0
reserved[0x3] [0x83000000-0x84ffffff], 0x02000000 bytes flags: 0x0
memblock_alloc_try_nid: 2097152 bytes align=0x200000 nid=-1
from=0x00000000 max_addr=0x00000000 early_alloc+0x20/0x4c
memblock_reserve: [0xb0000000-0xb01fffff]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 4096 bytes align=0x1000 nid=-1 from=0x00000000
max_addr=0x00000000 early_alloc+0x20/0x4c
memblock_reserve: [0xaffff000-0xafffffff]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 40 bytes align=0x4 nid=-1 from=0x00000000
max_addr=0x00000000 iotable_init+0x34/0xf0
memblock_reserve: [0xafffefd8-0xafffefff]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 4096 bytes align=0x1000 nid=-1 from=0x00000000
max_addr=0x00000000 early_alloc+0x20/0x4c
memblock_reserve: [0xafffd000-0xafffdfff]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 4096 bytes align=0x1000 nid=-1 from=0x00000000
max_addr=0x00000000 early_alloc+0x20/0x4c
memblock_reserve: [0xafffc000-0xafffcfff]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 4096 bytes align=0x1000 nid=-1 from=0x00000000
max_addr=0x00000000 early_alloc+0x20/0x4c
memblock_reserve: [0xafffb000-0xafffbfff]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 4096 bytes align=0x1000 nid=-1 from=0x00000000
max_addr=0x00000000 early_alloc+0x20/0x4c
memblock_reserve: [0xafffa000-0xafffafff]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 384 bytes align=0x20 nid=0 from=0x00000000
max_addr=0x00000000 sparse_init_nid+0x34/0x1d8
memblock_reserve: [0xafffee40-0xafffefbf]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_exact_nid_raw: 12582912 bytes align=0x80000 nid=0
from=0xc09fffff max_addr=0x00000000 sparse_init_nid+0xec/0x1d8
memblock_reserve: [0xaf380000-0xaff7ffff]
memblock_alloc_range_nid+0x104/0x13c
Zone ranges:
Normal [mem 0x0000000080a00000-0x00000000b01fffff]
HighMem [mem 0x00000000b0200000-0x00000000ffffefff]
Movable zone start for each node
Early memory node ranges
node 0: [mem 0x0000000080a00000-0x00000000855fffff]
node 0: [mem 0x0000000086a00000-0x0000000087dfffff]
node 0: [mem 0x000000008bd00000-0x000000008c4fffff]
node 0: [mem 0x000000008e300000-0x000000008ecfffff]
node 0: [mem 0x0000000090d00000-0x00000000bfffffff]
node 0: [mem 0x00000000cc000000-0x00000000dc9fffff]
node 0: [mem 0x00000000de700000-0x00000000de9fffff]
node 0: [mem 0x00000000e0800000-0x00000000e0bfffff]
node 0: [mem 0x00000000f4b00000-0x00000000f6ffffff]
node 0: [mem 0x00000000fda00000-0x00000000ffffefff]
Zeroed struct page in unavailable ranges: 513 pages
Initmem setup node 0 [mem 0x0000000080a00000-0x00000000ffffefff]
On node 0 totalpages: 311551
Normal zone: 1230 pages used for memmap
Normal zone: 0 pages reserved
Normal zone: 157440 pages, LIFO batch:31
HighMem zone: 154111 pages, LIFO batch:31
memblock_alloc_try_nid: 32 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 setup_arch+0x440/0x5c4
memblock_reserve: [0xafffee20-0xafffee3f]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 32 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 setup_arch+0x440/0x5c4
memblock_reserve: [0xafffee00-0xafffee1f]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 32 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 setup_arch+0x440/0x5c4
memblock_reserve: [0xafffede0-0xafffedff]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 32 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 setup_arch+0x440/0x5c4
memblock_reserve: [0xafffedc0-0xafffeddf]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 32 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 setup_arch+0x440/0x5c4
memblock_reserve: [0xafffeda0-0xafffedbf]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 32 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 setup_arch+0x440/0x5c4
memblock_reserve: [0xafffed80-0xafffed9f]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 32 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 setup_arch+0x440/0x5c4
memblock_reserve: [0xafffed60-0xafffed7f]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 32 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 setup_arch+0x440/0x5c4
memblock_reserve: [0xafffed40-0xafffed5f]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 32 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 setup_arch+0x440/0x5c4
memblock_reserve: [0xafffed20-0xafffed3f]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 32 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 setup_arch+0x440/0x5c4
memblock_reserve: [0xafffed00-0xafffed1f]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 22396 bytes align=0x4 nid=-1 from=0x00000000
max_addr=0x00000000 early_init_dt_alloc_memory_arch+0x30/0x64
memblock_reserve: [0xafff4884-0xafff9fff]
memblock_alloc_range_nid+0x104/0x13c
[dts]:cpu type is 1380
memblock_alloc_try_nid: 404 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 memblock_alloc.constprop.8+0x1c/0x24
memblock_reserve: [0xafffeb60-0xafffecf3]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 404 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 memblock_alloc.constprop.8+0x1c/0x24
memblock_reserve: [0xafffe9c0-0xafffeb53]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 4096 bytes align=0x1000 nid=-1 from=0x00000000
max_addr=0x00000000 memblock_alloc+0x18/0x20
memblock_reserve: [0xafff3000-0xafff3fff]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 4096 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 memblock_alloc+0x18/0x20
memblock_reserve: [0xafff2000-0xafff2fff]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 278528 bytes align=0x1000 nid=-1 from=0xc09fffff
max_addr=0x00000000 pcpu_dfl_fc_alloc+0x28/0x34
memblock_reserve: [0xaffae000-0xafff1fff]
memblock_alloc_range_nid+0x104/0x13c
memblock_free: [0xaffbf000-0xaffbefff] pcpu_embed_first_chunk+0x5ec/0x6a8
memblock_free: [0xaffd0000-0xaffcffff] pcpu_embed_first_chunk+0x5ec/0x6a8
memblock_free: [0xaffe1000-0xaffe0fff] pcpu_embed_first_chunk+0x5ec/0x6a8
memblock_free: [0xafff2000-0xafff1fff] pcpu_embed_first_chunk+0x5ec/0x6a8
percpu: Embedded 17 pages/cpu s37044 r8192 d24396 u69632
memblock_alloc_try_nid: 4 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 memblock_alloc+0x18/0x20
memblock_reserve: [0xafffefc0-0xafffefc3]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 4 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 memblock_alloc+0x18/0x20
memblock_reserve: [0xafffe9a0-0xafffe9a3]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 16 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 memblock_alloc+0x18/0x20
memblock_reserve: [0xafffe980-0xafffe98f]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 16 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 memblock_alloc+0x18/0x20
memblock_reserve: [0xafffe960-0xafffe96f]
memblock_alloc_range_nid+0x104/0x13c
pcpu-alloc: s37044 r8192 d24396 u69632 alloc=17*4096
pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3
memblock_alloc_try_nid: 128 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 memblock_alloc+0x18/0x20
memblock_reserve: [0xafffe8e0-0xafffe95f]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 92 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 memblock_alloc+0x18/0x20
memblock_reserve: [0xafffe880-0xafffe8db]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 384 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 memblock_alloc+0x18/0x20
memblock_reserve: [0xafffe700-0xafffe87f]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 388 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 memblock_alloc+0x18/0x20
memblock_reserve: [0xafffe560-0xafffe6e3]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 96 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 memblock_alloc+0x18/0x20
memblock_reserve: [0xafffe500-0xafffe55f]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 92 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 memblock_alloc+0x18/0x20
memblock_reserve: [0xafffe4a0-0xafffe4fb]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 768 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 memblock_alloc+0x18/0x20
memblock_reserve: [0xafffe1a0-0xafffe49f]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 772 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 memblock_alloc+0x18/0x20
memblock_reserve: [0xafff4580-0xafff4883]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 192 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 memblock_alloc+0x18/0x20
memblock_reserve: [0xafffe0e0-0xafffe19f]
memblock_alloc_range_nid+0x104/0x13c
memblock_free: [0xafff3000-0xafff3fff] pcpu_embed_first_chunk+0x570/0x6a8
memblock_free: [0xafff2000-0xafff2fff] pcpu_embed_first_chunk+0x58c/0x6a8
Built 1 zonelists, mobility grouping on. Total pages: 310321
Kernel command line: console=ttyAMA0,9600n8N lpj=8000000
initrd=0x83000000,0x2000000 maxcpus=4 master_cpu=1 quiet highres=off
oops=panic vecpage_wrprotect ksm=1 ramdisk_size=30720 kmemleak=off
min_loop=128 lockd.nlm_tcpport=13001 lockd.nlm_udpport=13001
rdinit=/sbin/init root=/dev/ram0 vmalloc=256M
printk: log_buf_len individual max cpu contribution: 4096 bytes
printk: log_buf_len total cpu_extra contributions: 12288 bytes
printk: log_buf_len min size: 16384 bytes
memblock_alloc_try_nid: 32768 bytes align=0x4 nid=-1 from=0x00000000
max_addr=0x00000000 setup_log_buf+0xe4/0x404
memblock_reserve: [0xaffa6000-0xaffadfff]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 12288 bytes align=0x4 nid=-1 from=0x00000000
max_addr=0x00000000 setup_log_buf+0x130/0x404
memblock_reserve: [0xaffa3000-0xaffa5fff]
memblock_alloc_range_nid+0x104/0x13c
memblock_alloc_try_nid: 90112 bytes align=0x4 nid=-1 from=0x00000000
max_addr=0x00000000 setup_log_buf+0x180/0x404
memblock_reserve: [0xaff8d000-0xaffa2fff]
memblock_alloc_range_nid+0x104/0x13c
printk: log_buf_len: 32768 bytes
printk: early log buf free: 2492(15%)
memblock_alloc_try_nid: 524288 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 alloc_large_system_hash+0x1b0/0x2e8
memblock_reserve: [0xaf300000-0xaf37ffff]
memblock_alloc_range_nid+0x104/0x13c
Dentry cache hash table entries: 131072 (order: 7, 524288 bytes, linear)
memblock_alloc_try_nid: 262144 bytes align=0x20 nid=-1 from=0x00000000
max_addr=0x00000000 alloc_large_system_hash+0x1b0/0x2e8
memblock_reserve: [0xaf2c0000-0xaf2fffff]
memblock_alloc_range_nid+0x104/0x13c
Inode-cache hash table entries: 65536 (order: 6, 262144 bytes, linear)
mem auto-init: stack:off, heap alloc:off, heap free:off
memblock_free: [0xaf430000-0xaf453fff] mem_init+0x154/0x238
memblock_free: [0xaf510000-0xaf545fff] mem_init+0x154/0x238
memblock_free: [0xaf560000-0xaf57ffff] mem_init+0x154/0x238
memblock_free: [0xafd98000-0xafdcdfff] mem_init+0x154/0x238
memblock_free: [0xafdd8000-0xafdfffff] mem_init+0x154/0x238
memblock_free: [0xafe18000-0xafe7ffff] mem_init+0x154/0x238
memblock_free: [0xafee0000-0xafefffff] mem_init+0x154/0x238
Memory: 1191160K/1246204K available (4096K kernel code, 436K rwdata,
1120K rodata, 1024K init, 491K bss, 55044K reserved, 0K cma-reserved,
616444K highmem)
[<c023999c>] (get_page_from_freelist) from [<c023a4dc>] (__alloc_pages_nodemask+0x188/0xc08)
[<c023a4dc>] (__alloc_pages_nodemask) from [<c0223078>] (alloc_zeroed_user_highpage_movable+0x14/0x3c)
[<c0223078>] (alloc_zeroed_user_highpage_movable) from [<c0226768>] (handle_mm_fault+0x254/0xac8)
[<c0226768>] (handle_mm_fault) from [<c04ba09c>] (do_page_fault+0x228/0x2f4)
[<c04ba09c>] (do_page_fault) from [<c0111d80>] (do_DataAbort+0x48/0xd0)
[<c0111d80>] (do_DataAbort) from [<c0100e00>] (__dabt_usr+0x40/0x60)
Zone ranges:
Normal [mem 0x0000000080a00000-0x00000000b01fffff]
HighMem [mem 0x00000000b0200000-0x00000000ffffefff]
Movable zone start for each node
Early memory node ranges
node 0: [mem 0x0000000080a00000-0x00000000855fffff]
node 0: [mem 0x0000000086a00000-0x0000000087dfffff]
node 0: [mem 0x000000008bd00000-0x000000008c4fffff]
node 0: [mem 0x000000008e300000-0x000000008ecfffff]
node 0: [mem 0x0000000090d00000-0x00000000bfffffff]
node 0: [mem 0x00000000cc000000-0x00000000dc9fffff]
node 0: [mem 0x00000000de700000-0x00000000de9fffff]
node 0: [mem 0x00000000e0800000-0x00000000e0bfffff]
node 0: [mem 0x00000000f4b00000-0x00000000f6ffffff]
node 0: [mem 0x00000000fda00000-0x00000000ffffefff]
----> free_memmap, start_pfn = 85800, 85800000 end_pfn = 86a00, 86a00000
----> free_memmap, start_pfn = 8c800, 8c800000 end_pfn = 8e300, 8e300000
----> free_memmap, start_pfn = 8f000, 8f000000 end_pfn = 90000, 90000000
----> free_memmap, start_pfn = dcc00, dcc00000 end_pfn = de700, de700000
----> free_memmap, start_pfn = dec00, dec00000 end_pfn = e0000, e0000000
----> free_memmap, start_pfn = e0c00, e0c00000 end_pfn = e4000, e4000000
----> free_memmap, start_pfn = f7000, f7000000 end_pfn = f8000, f8000000
=== >move_freepages: start_pfn/end_pfn [de601, de7ff], [de600000, de7ff000]
: pfn =de600 pfn2phy = de600000 , page = ef3cc000, page-flags = ffffffff
8<--- cut here ---
Unable to handle kernel paging request at virtual address fffffffe
pgd = 5dd50df5
[fffffffe] *pgd=affff861, *pte=00000000, *ppte=00000000
Internal error: Oops: 37 [#1] SMP ARM
Modules linked in: gmac(O)
CPU: 2 PID: 635 Comm: test-oom Tainted: G O 5.10.0+ #31
Hardware name: Hisilicon A9
PC is at move_freepages_block+0x150/0x278
LR is at move_freepages_block+0x150/0x278
pc : [<c02383a4>] lr : [<c02383a4>] psr: 200e0393
sp : c4179cf8 ip : 00000000 fp : 00000001
r10: c4179d58 r9 : 000de7ff r8 : 00000000
r7 : c0863280 r6 : 000de600 r5 : 000de600 r4 : ef3cc000
r3 : ffffffff r2 : 00000000 r1 : ef5d069c r0 : fffffffe
Flags: nzCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment user
Control: 1ac5387d Table: 83b0c04a DAC: 55555555
Process test-oom (pid: 635, stack limit = 0x25d667df)