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Date: Sun, 21 Aug 2022 01:36:08 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: kernel test robot <oliver.sang@...el.com>
Cc: Li Zhe <lizhe.67@...edance.com>, <lkp@...ts.01.org>,
<lkp@...el.com>, Masami Hiramatsu <mhiramat@...nel.org>,
Vlastimil Babka <vbabka@...e.cz>,
Kees Cook <keescook@...omium.org>,
"Jason A. Donenfeld" <Jason@...c4.com>,
Mark-PK Tsai <mark-pk.tsai@...iatek.com>,
Steven Rostedt <rostedt@...dmis.org>,
Zefan Li <lizefan.x@...edance.com>, Qian Cai <cai@....pw>,
Michal Hocko <mhocko@...nel.org>,
Pasha Tatashin <Pavel.Tatashin@...rosoft.com>,
Mel Gorman <mgorman@...hsingularity.net>,
Yang Shi <yang.shi@...aro.org>,
Joonsoo Kim <iamjoonsoo.kim@....com>,
LKML <linux-kernel@...r.kernel.org>,
Linux Memory Management List <linux-mm@...ck.org>
Subject: Re: [page_ext] a02a0e703b: Kernel_panic-not_syncing:Out_of_memory
On Sun, 21 Aug 2022 16:01:32 +0800 kernel test robot <oliver.sang@...el.com> wrote:
>
> Greeting,
>
> FYI, we noticed the following commit (built with gcc-11):
>
> commit: a02a0e703b59a6fdd1b8ae50b47396621a03fc1f ("page_ext: move up page_ext_init() to catch early page allocation if DEFERRED_STRUCT_PAGE_INIT is n")
> https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
>
> in testcase: boot
Thanks, I dropped the patch.
> on test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G
>
> caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
>
>
> +----------------------------------------+------------+------------+
> | | 3be3989b3b | a02a0e703b |
> +----------------------------------------+------------+------------+
> | boot_successes | 70 | 0 |
> | boot_failures | 0 | 66 |
> | Mem-Info | 0 | 66 |
> | Kernel_panic-not_syncing:Out_of_memory | 0 | 66 |
> +----------------------------------------+------------+------------+
>
>
> If you fix the issue, kindly add following tag
> Reported-by: kernel test robot <oliver.sang@...el.com>
>
>
> [ 0.541637][ T0] Memory: 3927672K/4193784K available (11206K kernel code, 4497K rwdata, 3820K rodata, 1008K init, 1332K bss, 266112K reserved, 0K
> cma-reserved, 3432328K highmem)
> [ 0.545125][ T0] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
> [ 0.546120][ T0] swapper: vmalloc error: size 7864320, vm_struct allocation failed, mode:0xdc0(GFP_KERNEL|__GFP_ZERO), nodemask=(null),cpuset=(nul
> l),mems_allowed=0-7
> [ 0.548152][ T0] CPU: 0 PID: 0 Comm: swapper Not tainted 6.0.0-rc1-00121-ga02a0e703b59 #1
> [ 0.549286][ T0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-4 04/01/2014
> [ 0.550662][ T0] Call Trace:
> [ 0.551108][ T0] ? show_stack+0x3d/0x45
> [ 0.551694][ T0] dump_stack_lvl+0x34/0x44
> [ 0.552299][ T0] dump_stack+0xd/0x10
> [ 0.552841][ T0] warn_alloc.cold+0x55/0xaf
> [ 0.553454][ T0] __vmalloc_node_range+0x87/0x140
> [ 0.554139][ T0] vzalloc_node+0x64/0x80
> [ 0.554716][ T0] ? _page_ext_init+0x119/0x1e7
> [ 0.555382][ T0] _page_ext_init+0x119/0x1e7
> [ 0.556010][ T0] start_kernel+0x213/0x49a
> [ 0.556615][ T0] ? early_idt_handler_common+0x44/0x44
> [ 0.557358][ T0] i386_start_kernel+0x48/0x4a
> [ 0.557995][ T0] startup_32_smp+0x161/0x164
> [ 0.558622][ T0] Mem-Info:
> [ 0.559039][ T0] active_anon:0 inactive_anon:0 isolated_anon:0
> [ 0.559039][ T0] active_file:0 inactive_file:0 isolated_file:0
> [ 0.559039][ T0] unevictable:0 dirty:0 writeback:0
> [ 0.559039][ T0] slab_reclaimable:0 slab_unreclaimable:25
> [ 0.559039][ T0] mapped:0 shmem:0 pagetables:0 bounce:0
> [ 0.559039][ T0] kernel_misc_reclaimable:0
> [ 0.559039][ T0] free:981893 free_pcp:0 free_cma:0
> [ 0.564216][ T0] Node 0 active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:0kB writeback:0kB shmem:0kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB kernel_stack:0kB pagetables:0kB all_unreclaimable? no
> [ 0.567976][ T0] Node 0 DMA free:15360kB boost:0kB min:0kB low:0kB high:0kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15360kB mlocked:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
> [ 0.571575][ T0] lowmem_reserve[]: 0 0 0 0
> [ 0.572172][ T0] Node 0 Normal free:479884kB boost:0kB min:0kB low:0kB high:0kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:745464kB managed:479984kB mlocked:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
> [ 0.575803][ T0] lowmem_reserve[]: 0 0 0 0
> [ 0.576395][ T0] Node 0 HighMem free:3432328kB boost:0kB min:0kB low:0kB high:0kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3432328kB managed:3432328kB mlocked:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
> [ 0.580081][ T0] lowmem_reserve[]: 0 0 0 0
> [ 0.580668][ T0] Node 0 DMA: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15360kB
> [ 0.582377][ T0] Node 0 Normal: 3*4kB (UM) 2*8kB (UM) 1*16kB (U) 1*32kB (M) 1*64kB (M) 2*128kB (UM) 3*256kB (UM) 1*512kB (U) 1*1024kB (U) 3*2048kB (UM) 115*4096kB (M) = 479884kB
> [ 0.584609][ T0] Node 0 HighMem: 0*4kB 1*8kB (M) 0*16kB 0*32kB 0*64kB 1*128kB (M) 1*256kB (M) 1*512kB (M) 1*1024kB (M) 1*2048kB (M) 837*4096kB (M) = 3432328kB
> [ 0.586543][ T0] 0 total pagecache pages
> [ 0.587121][ T0] 0 pages in swap cache
> [ 0.587680][ T0] Free swap = 0kB
> [ 0.588170][ T0] Total swap = 0kB
> [ 0.588664][ T0] 1048446 pages RAM
> [ 0.589165][ T0] 858082 pages HighMem/MovableOnly
> [ 0.589850][ T0] 66528 pages reserved
> [ 0.590394][ T0] 0 pages cma reserved
> [ 0.590947][ T0] page ext allocation failure
> [ 0.591574][ T0] Kernel panic - not syncing: Out of memory
> [ 0.592360][ T0] CPU: 0 PID: 0 Comm: swapper Not tainted 6.0.0-rc1-00121-ga02a0e703b59 #1
> [ 0.593520][ T0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-4 04/01/2014
> [ 0.594937][ T0] Call Trace:
> [ 0.595370][ T0] ? show_stack+0x3d/0x45
> [ 0.595952][ T0] dump_stack_lvl+0x34/0x44
> [ 0.596560][ T0] dump_stack+0xd/0x10
> [ 0.597098][ T0] panic+0xdd/0x251
> [ 0.597602][ T0] _page_ext_init+0x131/0x1e7
> [ 0.598223][ T0] start_kernel+0x213/0x49a
> [ 0.598830][ T0] ? early_idt_handler_common+0x44/0x44
> [ 0.599530][ T0] i386_start_kernel+0x48/0x4a
> [ 0.600152][ T0] startup_32_smp+0x161/0x164
>
>
>
> To reproduce:
>
> # build kernel
> cd linux
> cp config-6.0.0-rc1-00121-ga02a0e703b59 .config
> make HOSTCC=gcc-11 CC=gcc-11 ARCH=i386 olddefconfig prepare modules_prepare bzImage modules
> make HOSTCC=gcc-11 CC=gcc-11 ARCH=i386 INSTALL_MOD_PATH=<mod-install-dir> modules_install
> cd <mod-install-dir>
> find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz
>
>
> git clone https://github.com/intel/lkp-tests.git
> cd lkp-tests
> bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is attached in this email
>
> # if come across any failure that blocks the test,
> # please remove ~/.lkp and /lkp dir to run from a clean state.
>
>
>
> --
> 0-DAY CI Kernel Test Service
> https://01.org/lkp
>
>
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