Re: [mainline]Kernel Boot Warings at arch/powerpc/mm/mem.c:341

[Sourabh Jain <sourabhjain@linux.ibm.com>]

Hello Venkat,

On 16/10/25 15:21, Sourabh Jain wrote:
>
>
> On 10/10/25 11:15, Venkat Rao Bagalkote wrote:
>> Greetings!!!
>>
>>
>> IBM CI has reported kernel boot warnings on the mainline kernel on 
>> IBM Power11 system.
>>
>>
>> Attached is the .config file.
>>
>> Traces:
>>
>>
>> [    0.040098] plpks: POWER LPAR Platform KeyStore is not supported 
>> or enabled
>> [    0.043041] ------------[ cut here ]------------
>> [    0.043045] WARNING: CPU: 0 PID: 1 at arch/powerpc/mm/mem.c:341 
>> add_system_ram_resources+0xfc/0x180
>> [    0.043058] Modules linked in:
>> [    0.043065] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 
>> 6.17.0-auto-12607-g5472d60c129f #1 VOLUNTARY
>> [    0.043072] Hardware name: IBM,9080-HEX Power11 (architected) 
>> 0x820200 0xf000007 of:IBM,FW1110.01 (NH1110_069) hv:phyp pSeries
>> [    0.043078] NIP:  c00000000201de3c LR: c00000000201de34 CTR: 
>> 0000000000000000
>> [    0.043082] REGS: c000000127cef8a0 TRAP: 0700   Not tainted 
>> (6.17.0-auto-12607-g5472d60c129f)
>> [    0.043088] MSR:  8000000002029033 <SF,VEC,EE,ME,IR,DR,RI,LE>  CR: 
>> 84000840  XER: 20040010
>> [    0.043099] CFAR: c00000000017eed0 IRQMASK: 0
>> [    0.043099] GPR00: c00000000201de34 c000000127cefb40 
>> c0000000016a8100 0000000000000001
>> [    0.043099] GPR04: c00000012005aa00 0000000020000000 
>> c000000002b705c8 0000000000000000
>> [    0.043099] GPR08: 000000007fffffff fffffffffffffff0 
>> c000000002db8100 000000011fffffff
>> [    0.043099] GPR12: c00000000201dd40 c000000002ff0000 
>> c0000000000112bc 0000000000000000
>> [    0.043099] GPR16: 0000000000000000 0000000000000000 
>> 0000000000000000 0000000000000000
>> [    0.043099] GPR20: 0000000000000000 0000000000000000 
>> 0000000000000000 c0000000015a3808
>> [    0.043099] GPR24: c00000000200468c c000000001699888 
>> 0000000000000106 c0000000020d1950
>> [    0.043099] GPR28: c0000000014683f8 0000000081000200 
>> c0000000015c1868 c000000002b9f710
>> [    0.043138] NIP [c00000000201de3c] 
>> add_system_ram_resources+0xfc/0x180
>> [    0.043143] LR [c00000000201de34] add_system_ram_resources+0xf4/0x180
>> [    0.043148] Call Trace:
>> [    0.043150] [c000000127cefb40] [c00000000201de34] 
>> add_system_ram_resources+0xf4/0x180 (unreliable)
>> [    0.043157] [c000000127cefba0] [c000000000010eb4] 
>> do_one_initcall+0x60/0x36c
>> [    0.043162] [c000000127cefc80] [c0000000020068cc] 
>> do_initcalls+0x120/0x220
>> [    0.043169] [c000000127cefd30] [c000000002006cbc] 
>> kernel_init_freeable+0x23c/0x390
>> [    0.043174] [c000000127cefde0] [c0000000000112e8] 
>> kernel_init+0x34/0x26c
>> [    0.043178] [c000000127cefe50] [c00000000000df7c] 
>> ret_from_kernel_user_thread+0x14/0x1c
>> [    0.043181] ---- interrupt: 0 at 0x0
>> [    0.043186] Code: 3d02010c e9210028 e9410020 fb840010 fba40018 
>> 38685b48 3929ffff f9440000 f9240008 4a161035 60000000 54630ffe 
>> <0b030000> 39210028 39400000 39010020
>> [    0.043197] ---[ end trace 0000000000000000 ]---
>> [    0.043202] ------------[ cut here ]------------
>> [    0.043203] WARNING: CPU: 0 PID: 1 at arch/powerpc/mm/mem.c:341 
>> add_system_ram_resources+0xfc/0x180
>> [    0.043209] Modules linked in:
>> [    0.043212] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Tainted: G W      
>>      6.17.0-auto-12607-g5472d60c129f #1 VOLUNTARY
>> [    0.043217] Tainted: [W]=WARN
>> [    0.043219] Hardware name: IBM,9080-HEX Power11 (architected) 
>> 0x820200 0xf000007 of:IBM,FW1110.01 (NH1110_069) hv:phyp pSeries
>> [    0.043223] NIP:  c00000000201de3c LR: c00000000201de34 CTR: 
>> 0000000000000000
>> [    0.043226] REGS: c000000127cef8a0 TRAP: 0700   Tainted: G W       
>>     (6.17.0-auto-12607-g5472d60c129f)
>> [    0.043229] MSR:  8000000002029033 <SF,VEC,EE,ME,IR,DR,RI,LE>  CR: 
>> 84000440  XER: 20040010
>> [    0.043237] CFAR: c00000000017eed0 IRQMASK: 0
>> [    0.043237] GPR00: c00000000201de34 c000000127cefb40 
>> c0000000016a8100 0000000000000001
>> [    0.043237] GPR04: c00000012005a9c0 0000000020000000 
>> c000000002b705c8 0000000080000000
>> [    0.043237] GPR08: 000000257fffffff fffffffffffffff0 
>> c000000002db8100 000000011fffffff
>> [    0.043237] GPR12: c00000000201dd40 c000000002ff0000 
>> c0000000000112bc 0000000000000000
>> [    0.043237] GPR16: 0000000000000000 0000000000000000 
>> 0000000000000000 0000000000000000
>> [    0.043237] GPR20: 0000000000000000 0000000000000000 
>> 0000000000000000 c0000000015a3808
>> [    0.043237] GPR24: c00000000200468c c000000001699888 
>> 0000000000000106 c0000000020d1950
>> [    0.043237] GPR28: c0000000014683f8 0000000081000200 
>> c0000000015c1868 c000000002b9f710
>> [    0.043271] NIP [c00000000201de3c] 
>> add_system_ram_resources+0xfc/0x180
>> [    0.043276] LR [c00000000201de34] add_system_ram_resources+0xf4/0x180
>> [    0.043280] Call Trace:
>> [    0.043281] [c000000127cefb40] [c00000000201de34] 
>> add_system_ram_resources+0xf4/0x180 (unreliable)
>> [    0.043287] [c000000127cefba0] [c000000000010eb4] 
>> do_one_initcall+0x60/0x36c
>> [    0.043291] [c000000127cefc80] [c0000000020068cc] 
>> do_initcalls+0x120/0x220
>> [    0.043296] [c000000127cefd30] [c000000002006cbc] 
>> kernel_init_freeable+0x23c/0x390
>> [    0.043301] [c000000127cefde0] [c0000000000112e8] 
>> kernel_init+0x34/0x26c
>> [    0.043305] [c000000127cefe50] [c00000000000df7c] 
>> ret_from_kernel_user_thread+0x14/0x1c
>> [    0.043308] ---- interrupt: 0 at 0x0
>> [    0.043311] Code: 3d02010c e9210028 e9410020 fb840010 fba40018 
>> 38685b48 3929ffff f9440000 f9240008 4a161035 60000000 54630ffe 
>> <0b030000> 39210028 39400000 39010020
>> [    0.043322] ---[ end trace 0000000000000000 ]---
>> [    0.043520] kprobes: kprobe jump-optimization is enabled. Al
>

Please try the below fix:
https://lore.kernel.org/all/20251016142831.144515-1-sourabhjain@linux.ibm.com/

Thanks,
Sourabh Jain