Le 30/03/2021 à 12:37, Paul Menzel a écrit :
Dear Linux folks,
On the POWER8 system IBM S822LC, Linux 5.12-rc5+ logs the warning below.
```
[ 0.723485] ------------[ cut here ]------------
[ 0.723491] WARNING: CPU: 0 PID: 1 at arch/powerpc/lib/feature-fixups.c:109
do_feature_fixups+0xb0/0xf0
[ 0.723512] Modules linked in:
[ 0.723524] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.12.0-rc5+ #3
[ 0.723537] NIP: c0000000000bbc70 LR: c0000000000bbc3c CTR: 0000000000000000
[ 0.723547] REGS: c00000800d48b800 TRAP: 0700 Not tainted (5.12.0-rc5+)
[ 0.723556] MSR: 9000000002029033 <SF,HV,VEC,EE,ME,IR,DR,RI,LE> CR:
42008244 XER: 20000000
[ 0.723613] CFAR: c0000000000bbc40 IRQMASK: 0
GPR00: c000000001707610 c00000800d48baa0 c0000000021bb200
0000000000000001
GPR04: c0000000021d0d88 aaaaaaaaaaaaaaab 00000000ffffffc0
c0000000021c0034
GPR08: 0000000c000003a0 0000000000000000 0000000000000000
0000000080000000
GPR12: c000000001211458 c0000000028e0000 c0000000000129f8
0000000000000000
GPR16: 0000000000000000 0000000000000000 0000000000000000
c000000001f003f0
GPR20: c000000001f003d0 c000000001f003b0 c000000001f00390
c000000001703520
GPR24: 0000000000000004 c0000000016ddfe0 c000000001791048
c000000001791088
GPR28: c0000000014fd870 000000fb8f5db187 c0000000021d0d88
0000000000000001
[ 0.723822] NIP [c0000000000bbc70] do_feature_fixups+0xb0/0xf0
[ 0.723835] LR [c0000000000bbc3c] do_feature_fixups+0x7c/0xf0
[ 0.723848] Call Trace:
[ 0.723854] [c00000800d48baa0] [c0000000001b4f4c] parse_one+0x11c/0x3c0
(unreliable)
[ 0.723875] [c00000800d48bb20] [c000000001707610]
vdso_fixup_features+0xbc/0x11c
[ 0.723896] [c00000800d48bb60] [c0000000017078bc] vdso_init+0x154/0x1b0
[ 0.723914] [c00000800d48bb90] [c0000000000123c0] do_one_initcall+0x60/0x2c0
[ 0.723933] [c00000800d48bc60] [c000000001704944] do_initcalls+0x1e0/0x248
[ 0.723951] [c00000800d48bd40] [c000000001704c38]
kernel_init_freeable+0x1f0/0x25c
[ 0.723969] [c00000800d48bda0] [c000000000012a14] kernel_init+0x24/0x170
[ 0.723987] [c00000800d48be10] [c00000000000d6ec]
ret_from_kernel_thread+0x5c/0x70
[ 0.724005] Instruction dump:
[ 0.724014] 40820030 37ffffff 3bde0030 4082ffe4 38210080 e8010010 eb81ffe0
eba1ffe8
[ 0.724057] ebc1fff0 ebe1fff8 7c0803a6 4e800020 <0fe00000> e8fe0028 e8de0020
e8be0018
[ 0.724102] ---[ end trace 9bbb55f5cd8ca2ba ]---
[ 0.724118] Unable to patch feature section at (____ptrval____) - (____ptrval____) with
(____ptrval____) - (____ptrval____)
[ 0.724185] pstore: Registered nvram as persistent store backend
```
Please find the output of `dmesg` attached.
I saw something similar yesterday. Never seen that before.
[ 0.379079] ------------[ cut here ]------------
[ 0.383423] WARNING: CPU: 0 PID: 1 at arch/powerpc/lib/feature-fixups.c:109
do_feature_fixups+0x140/0x228
[ 0.392889] Modules linked in:
[ 0.395903] CPU: 0 PID: 1 Comm: swapper Not tainted
5.12.0-rc4-s3k-dev-01552-g479934522d20 #4818
[ 0.404593] NIP: c0016754 LR: c0896b88 CTR: 00000000
[ 0.409582] REGS: c9023d60 TRAP: 0700 Not tainted
(5.12.0-rc4-s3k-dev-01552-g479934522d20)
[ 0.418016] MSR: 00029032 <EE,ME,IR,DR,RI> CR: 44000244 XER: 00000000
[ 0.424730]
[ 0.424730] GPR00: c0896b88 c9023e20 c20f8000 00000100 c0b18b48 c0b18b60
cfffff60 c07141d0
[ 0.424730] GPR08: c0048f24 fee4fd4d fffff860 00000069 00000002 00000000
c0003eb4 00000000
[ 0.424730] GPR16: 00000000 00000000 00000000 00000000 00000000 00000000
c07efff4 00000100
[ 0.424730] GPR24: c0b18b60 60000000 c0b18bd0 c0b18b58 c0b183b8 c0b18b48
c1cc8e83 c0b18000
[ 0.460703] NIP [c0016754] do_feature_fixups+0x140/0x228
[ 0.465954] LR [c0896b88] vdso_init+0x90/0x170
[ 0.470345] Call Trace:
[ 0.472752] [c9023e20] [c08c7014] 0xc08c7014 (unreliable)
[ 0.478089] [c9023e70] [c0896b88] vdso_init+0x90/0x170
[ 0.483166] [c9023e90] [c0003a40] do_one_initcall+0x38/0x214
[ 0.488760] [c9023ef0] [c0894db0] kernel_init_freeable+0x164/0x208
[ 0.494870] [c9023f20] [c0003ec8] kernel_init+0x14/0x10c
[ 0.500120] [c9023f30] [c0011158] ret_from_kernel_thread+0x14/0x1c
[ 0.506233] Instruction dump:
[ 0.509159] 40bcff98 4bfffe0d 2c030000 4182ff8c 839d0014 837d0010 835d000c
83dd0008
[ 0.516990] 7f9de214 7f7dda14 7f5dd214 7fddf214 <0fe00000> 7f87e378 7f66db78
7f45d378
[ 0.525015] ---[ end trace f393ae62677e62a5 ]---
[ 0.529659] Unable to patch feature section at (ptrval) - (ptrval) with
(ptrval) - (ptrval)
Christophe
