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Date:   Thu, 15 Sep 2022 23:59:38 +0800
From:   Wang Yugui <wangyugui@e16-tech.com>
To:     Naresh Kamboju <naresh.kamboju@linaro.org>
Subject: Re: [PATCH 5.15 000/121] 5.15.68-rc1 review
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-kernel@vger.kernel.org, stable@vger.kernel.org,
        torvalds@linux-foundation.org, akpm@linux-foundation.org,
        linux@roeck-us.net, shuah@kernel.org, patches@kernelci.org,
        lkft-triage@lists.linaro.org, pavel@denx.de, jonathanh@nvidia.com,
        f.fainelli@gmail.com, sudipm.mukherjee@gmail.com,
        slade@sladewatkins.com,
        Trond Myklebust <trond.myklebust@hammerspace.com>,
        Anna Schumaker <anna@kernel.org>, linux-nfs@vger.kernel.org
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References: <20220913140357.323297659@linuxfoundation.org> <CA+G9fYv5CJeEaxu6XoaJrpizk+z1uXZ0aaQm2DVTA_w79oa2SA@mail.gmail.com>
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Hi,

> I have not bisected the reported problem.
> 
> hugemmap05.c:99: TINFO: check /proc/meminfo before allocation.
> hugemmap05.c:278: TINFO: HugePages_Total is 3.
> hugemmap05.c:278: TINFO: HugePages_Free is 3.
> hugemmap05.c:278: TINFO: HugePages_Surp is 1.
> hugemmap05.c:27[   51.077819] ------------[ cut here ]------------
> [   51.082692] WARNING: CPU: 0 PID: 590 at fs/nfs/inode.c:123
> nfs_evict_inode+0x58/0x70
> [   51.090451] Modules linked in: x86_pkg_temp_thermal
> [   51.095329] CPU: 0 PID: 590 Comm: hugemmap05 Not tainted 5.15.68-rc1 #1
> [   51.101948] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
> 2.5 11/26/2020
> [   51.109340] RIP: 0010:nfs_evict_inode+0x58/0x70
> [   51.113872] Code: 29 49 8b 54 24 90 49 8d 44 24 90 48 39 c2 75 2b
> 4c 89 e7 e8 7a d8 ff ff 4c 89 e7 e8 82 74 ff ff 4c 8b 65 f8 c9 c3 cc
> cc cc cc <0f> 0b 49 8b 54 24 90 49 8d 44 24 90 48 39 c2 74 d5 0f 0b eb
> d1 0f
> [   51.132626] RSP: 0018:ffffb6b140a8fb90 EFLAGS: 00010286
> [   51.137861] RAX: adacafaea9a8abaa RBX: ffff937fa606a2c0 RCX: ffffb6b140a8fbd0
> [   51.144986] RDX: ffff937fa606a2d0 RSI: ffffffffbc720682 RDI: ffffffffbc5ec05f
> [   51.152120] RBP: ffffb6b140a8fb98 R08: 0000000000000000 R09: ffffb6b140a8fcf0
> [   51.159253] R10: 0000000000000000 R11: 0000000000000002 R12: ffff937fa606a1a8
> [   51.166395] R13: ffffffffbd851b40 R14: ffff937c40803870 R15: 0000000000000003
> [   51.173525] FS:  00007f5afcdf4740(0000) GS:ffff937fa7a00000(0000)
> knlGS:0000000000000000
> [   51.181602] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [   51.187359] CR2: 00007f5afcf10680 CR3: 000000010360a006 CR4: 00000000003706f0
> 8: TINFO: HugePa[   51.194499] DR0: 0000000000000000 DR1:
> 0000000000000000 DR2: 0000000000000000
> [   51.203009] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> [   51.210135] Call Trace:
> [   51.212585]  <TASK>
> [   51.214684]  evict+0xc8/0x180
> [   51.217682]  prune_icache_sb+0x81/0xc0
> [   51.221435]  super_cache_scan+0x169/0x200
> [   51.225447]  do_shrink_slab+0x13f/0x2b0
> [   51.229288]  shrink_slab+0x186/0x2a0
> [   51.232868]  drop_slab_node+0x4a/0xa0
> [   51.236533]  drop_slab+0x41/0x90
> [   51.239765]  drop_caches_sysctl_handler+0x79/0x90
> [   51.244471]  proc_sys_call_handler+0x159/0x290
> [   51.248918]  proc_sys_write+0x13/0x20
> [   51.252582]  new_sync_write+0x111/0x1a0
> [   51.256423]  vfs_write+0x1d5/0x270
> [   51.259828]  ksys_write+0x67/0xf0
> [   51.263150]  __x64_sys_write+0x19/0x20
> [   51.266901]  do_syscall_64+0x38/0x90
> [   51.270479]  entry_SYSCALL_64_after_hwframe+0x61/0xcb
> [   51.275534] RIP: 0033:0x7f5afcef31d7
> [   51.279112] Code: 0f 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7
> 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00
> 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89
> 74 24
> [   51.297859] RSP: 002b:00007ffd40638738 EFLAGS: 00000246 ORIG_RAX:
> 0000000000000001
> [   51.305425] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f5afcef31d7
> [   51.312557] RDX: 0000000000000001 RSI: 00000000016f1480 RDI: 0000000000000003
> [   51.319689] RBP: 00000000016f1480 R08: 0000000000000001 R09: 0000000000000001
> [   51.326812] R10: 0000000000001000 R11: 0000000000000246 R12: 0000000000000001
> [   51.333938] R13: 00000000016f12a0 R14: 0000000000000001 R15: 00007f5afcfe87a0
> [   51.341073]  </TASK>
> [   51.343264] ---[ end trace 3420625c1fbde9e9 ]---
> ges_Rsvd is 3.
> [   51.348004] hugemmap05 (590): drop_caches: 3
> hugemmap05.c:253: TINFO: First hex is 7070707

I hit this warning too.

It seems that we need this patch for 5.15.y

commit 0ebeebcf59601bcfa0284f4bb7abdec051eb856d
Author: Dave Wysochanski <dwysocha@redhat.com>
Date:   Sun Oct 10 18:23:13 2021 -0400

    NFS: Fix WARN_ON due to unionization of nfs_inode.nrequests

    Fixes the following WARN_ON
    WARNING: CPU: 2 PID: 18678 at fs/nfs/inode.c:123 nfs_clear_inode+0x3b/0x50 [nfs]
    ...
    Call Trace:
      nfs4_evict_inode+0x57/0x70 [nfsv4]
      evict+0xd1/0x180

Best Regards
Wang Yugui (wangyugui@e16-tech.com)
2022/09/15