From: Venkat <venkat88@linux.ibm.com>
To: gautam@linux.ibm.com
Cc: christophe.leroy@csgroup.eu, LKML <linux-kernel@vger.kernel.org>,
linuxppc-dev@lists.ozlabs.org, maddy@linux.ibm.com,
Michael Ellerman <mpe@ellerman.id.au>,
naveen@kernel.org, npiggin@gmail.com, vaibhav@linux.ibm.com,
venkat88@linux.ibm.com
Subject: Re: [PATCH] powerpc/pseries/msi: Avoid reading PCI device registers in reduced power states
Date: Tue, 22 Apr 2025 10:20:53 +0530 [thread overview]
Message-ID: <3E89A76F-21AD-48BB-9333-1A43C04DB3B7@linux.ibm.com> (raw)
Hello Gautam,
Makes sense to track this observation separately. I tried it on fedora41 with kernel, 6.11.4-301.fc41.ppc64le, and this warning is there also.
Traces:
[ 105.121663] ------------[ cut here ]------------
[ 105.121664] WARNING: CPU: 0 PID: 16 at arch/powerpc/sysdev/xics/icp-hv.c:55 icp_hv_eoi+0xf8/0x120
[ 105.121683] Modules linked in: bonding tls nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 rfkill nf_tables sunrpc ibmveth
[ 105.121719] PM: suspend exit
[ 105.121720] pseries_rng vmx_crypto crct10dif_vpmsum fuse dm_multipath loop nfnetlink zram vsock_loopback vmw_vsock_virtio_transport_common vsock xfs ibmvscsi scsi_transport_srp crc32c_vpmsum scsi_dh_rdac scsi_dh_emc scsi_dh_alua
[ 105.121790] CPU: 0 UID: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.11.4-301.fc41.ppc64le #1
[ 105.121800] Hardware name: IBM,8375-42A POWER9 (architected) 0x4e0202 0xf000005 of:IBM,FW950.A0 (VL950_144) hv:phyp pSeries
[ 105.121808] NIP: c0000000000d5068 LR: c0000000000d5064 CTR: c00000000011d810
[ 105.121811] REGS: c000000004c87a20 TRAP: 0700 Not tainted (6.11.4-301.fc41.ppc64le)
[ 105.121821] MSR: 800000000282b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE> CR: 44004202 XER: 00000010
[ 105.121845] CFAR: c000000000246c2c IRQMASK: 1
[ 105.121845] GPR00: c0000000000d5064 c000000004c87cc0 c0000000021c0900 000000000000003f
[ 105.121845] GPR04: 00000000ffffdfff 00000000ffffdfff c000000004c87ab8 00000007f8e50000
[ 105.121845] GPR08: 0000000000000027 c0000007fc007190 0000000000000001 0000000044004202
[ 105.121845] GPR12: c00000000011d810 c000000003f40000 c0000000001bf378 c000000004f07640
[ 105.121845] GPR16: 0000000000000000 0000000004208040 c000000003d12a80 c000000003242e80
[ 105.121845] GPR20: 00000000ffffb375 000000000000000a c0000000031b6980 c0000000002532f0
[ 105.121845] GPR24: 0000000000000001 0000000000000000 0000000000000006 0000000000000002
[ 105.121845] GPR28: c0000007fc006898 0000000000000000 00000000050a0002 00000000050a0002
[ 105.121945] NIP [c0000000000d5068] icp_hv_eoi+0xf8/0x120
[ 105.121953] LR [c0000000000d5064] icp_hv_eoi+0xf4/0x120
[ 105.121961] Call Trace:
[ 105.121965] [c000000004c87cc0] [c0000000000d5064] icp_hv_eoi+0xf4/0x120 (unreliable)
[ 105.121976] [c000000004c87d40] [c000000000254eac] handle_fasteoi_irq+0x16c/0x350
[ 105.121987] [c000000004c87d70] [c0000000002533b0] resend_irqs+0xc0/0x190
[ 105.121997] [c000000004c87db0] [c00000000018b690] tasklet_action_common.isra.0+0x150/0x430
[ 105.122007] [c000000004c87e20] [c00000000018aafc] handle_softirqs+0x17c/0x4f0
[ 105.122017] [c000000004c87f10] [c00000000018aed8] run_ksoftirqd+0x68/0xb0
[ 105.122025] [c000000004c87f30] [c0000000001ca460] smpboot_thread_fn+0x1e0/0x250
[ 105.122036] [c000000004c87f90] [c0000000001bf4a4] kthread+0x134/0x140
[ 105.122047] [c000000004c87fe0] [c00000000000ded8] start_kernel_thread+0x14/0x18
[ 105.122056] Code: 48bc88c1 60000000 e9210068 4bffff9c 7c661b78 3c82ff40 3c62ff85 7fc5f378 3884ca50 38637628 48171b85 60000000 <0fe00000> 38210080 7be34622 e8010010
[ 105.122094] ---[ end trace 0000000000000000 ]—
Regards,
Venkat.
next reply other threads:[~2025-04-22 4:51 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-22 4:50 Venkat [this message]
-- strict thread matches above, loose matches on Subject: below --
2025-03-05 9:02 Gautam Menghani
2025-03-10 5:00 ` Vaibhav Jain
2025-03-26 17:32 ` Venkat Rao Bagalkote
2025-04-21 11:50 ` Gautam Menghani
2025-05-04 3:21 ` Madhavan Srinivasan
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