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SubjectRe: [ext4] [confidence: ] 2f7f60cf9f: WARNING:at_lib/list_debug.c:#__list_add_valid
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Hi Oliver,

On 2019/8/30 11:11, kernel test robot wrote:
> FYI, we noticed the following commit (built with gcc-7):
>
> commit: 2f7f60cf9fbcd80200edee8c29b9b35681c63c3e ("[PATCH] ext4: change the type of ext4 cache stats to percpu_counter to improve performance")

Thanks for the report.

This patch has been dropped and the updated patch has been sent to community.
https://lkml.org/lkml/2019/8/28/286

Thanks,
Shaokun

> url: https://github.com/0day-ci/linux/commits/Shaokun-Zhang/ext4-change-the-type-of-ext4-cache-stats-to-percpu_counter-to-improve-performance/20190825-123505
>
>
> in testcase: ltp
> with following parameters:
>
> test: quickhit
>
> test-description: The LTP testsuite contains a collection of tools for testing the Linux kernel and related features.
> test-url: http://linux-test-project.github.io/
>
>
> on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
>
> caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
>
>
> +-----------------------------------------------------+------------+------------+
> | | e67095fd2f | 2f7f60cf9f |
> +-----------------------------------------------------+------------+------------+
> | boot_successes | 25 | 12 |
> | boot_failures | 0 | 17 |
> | WARNING:at_lib/list_debug.c:#__list_add_valid | 0 | 17 |
> | RIP:__list_add_valid | 0 | 17 |
> | WARNING:at_lib/list_debug.c:#__list_del_entry_valid | 0 | 3 |
> | RIP:__list_del_entry_valid | 0 | 3 |
> +-----------------------------------------------------+------------+------------+
>
>
> If you fix the issue, kindly add following tag
> Reported-by: kernel test robot <oliver.sang@intel.com>
>
>
> [ 62.458944] WARNING: CPU: 1 PID: 2533 at lib/list_debug.c:25 __list_add_valid+0x36/0x70
> [ 62.460445] Modules linked in: fuse vfat fat btrfs xor zstd_decompress zstd_compress raid6_pq xfs libcrc32c ext4 mbcache jbd2 loop intel_rapl_msr intel_rapl_common crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel sr_mod bochs_drm cdrom drm_vram_helper sg ttm ppdev drm_kms_helper ata_generic pata_acpi syscopyarea sysfillrect sysimgblt snd_pcm fb_sys_fops drm snd_timer snd aesni_intel crypto_simd cryptd glue_helper soundcore pcspkr joydev serio_raw ata_piix libata i2c_piix4 floppy parport_pc parport ip_tables
> [ 62.468134] CPU: 1 PID: 2533 Comm: fsync01 Not tainted 5.3.0-rc5-00283-g2f7f60cf9fbcd #1
> [ 62.469707] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
> [ 62.471293] RIP: 0010:__list_add_valid+0x36/0x70
> [ 62.472332] Code: 48 8b 10 4c 39 c2 75 27 48 39 f8 74 39 48 39 fa 74 34 b8 01 00 00 00 c3 48 89 d1 48 c7 c7 28 ce d2 82 48 89 c2 e8 ba 47 c2 ff <0f> 0b 31 c0 c3 48 89 c1 4c 89 c6 48 c7 c7 a0 ce d2 82 e8 a3 47 c2
> [ 62.475779] RSP: 0018:ffffb815c0497cc0 EFLAGS: 00010082
> [ 62.477028] RAX: 0000000000000000 RBX: ffff9ab02e61c418 RCX: 0000000000000006
> [ 62.478540] RDX: 0000000000000007 RSI: 0000000000000086 RDI: ffff9ab0bfd17770
> [ 62.480096] RBP: ffff9ab02e61c428 R08: 0000000000000510 R09: 0000000000aaaaaa
> [ 62.481707] R10: 0000000000000007 R11: ffff9ab097f6b8b0 R12: ffff9ab02e61c450
> [ 62.483231] R13: ffffffff8314ce80 R14: 0000000000000202 R15: 0000000000000000
> [ 62.484861] FS: 00007f8b236e0500(0000) GS:ffff9ab0bfd00000(0000) knlGS:0000000000000000
> [ 62.486641] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 62.488103] CR2: 000055b3435d0a60 CR3: 000000019b8d2000 CR4: 00000000000406e0
> [ 62.489798] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [ 62.491343] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> [ 62.492925] Call Trace:
> [ 62.494524] __percpu_counter_init+0x64/0xa0
> [ 62.495780] ext4_es_register_shrinker+0x53/0x130 [ext4]
> [ 62.497235] ext4_fill_super+0x1cd4/0x3ad0 [ext4]
> [ 62.498521] ? ext4_calculate_overhead+0x4a0/0x4a0 [ext4]
> [ 62.499946] mount_bdev+0x173/0x1b0
> [ 62.501120] legacy_get_tree+0x27/0x40
> [ 62.502315] vfs_get_tree+0x25/0xf0
> [ 62.503421] do_mount+0x691/0x9c0
> [ 62.504516] ? memdup_user+0x4b/0x70
> [ 62.505793] ksys_mount+0x80/0xd0
> [ 62.506858] __x64_sys_mount+0x21/0x30
> [ 62.507979] do_syscall_64+0x5b/0x1f0
> [ 62.509194] entry_SYSCALL_64_after_hwframe+0x44/0xa9
> [ 62.510491] RIP: 0033:0x7f8b2320f48a
> [ 62.511589] Code: 48 8b 0d 11 fa 2a 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d de f9 2a 00 f7 d8 64 89 01 48
> [ 62.515429] RSP: 002b:00007ffdcb5920e8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
> [ 62.517274] RAX: ffffffffffffffda RBX: 00005564e2fd94d5 RCX: 00007f8b2320f48a
> [ 62.518865] RDX: 00005564e2fd94d5 RSI: 00005564e2fd6b08 RDI: 00007ffdcb593edf
> [ 62.520461] RBP: 00007ffdcb593edf R08: 0000000000000000 R09: 00005564e2fd94d5
> [ 62.522183] R10: 0000000000000000 R11: 0000000000000206 R12: 00005564e2fd6b08
> [ 62.523770] R13: 00005564e2fd6b67 R14: 00000000000002f5 R15: 0000000000000000
> [ 62.525457] ---[ end trace 6c35045d811b284c ]---
>
>
> To reproduce:
>
> # build kernel
> cd linux
> cp config-5.3.0-rc5-00283-g2f7f60cf9fbcd .config
> make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules
> make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 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
>
>
>
> Thanks,
> Oliver Sang
>

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