From: Balbir Singh <bsingharora@gmail.com>
To: Torsten Duwe <duwe@lst.de>, Michael Ellerman <mpe@ellerman.id.au>
Cc: Petr Mladek <pmladek@suse.com>, Jessica Yu <jeyu@redhat.com>,
Jiri Kosina <jkosina@suse.cz>,
linux-kernel@vger.kernel.org,
Steven Rostedt <rostedt@goodmis.org>,
Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>,
live-patching@vger.kernel.org, Miroslav Benes <mbenes@suse.cz>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH v8 8/8] livepatch: Detect offset for the ftrace location during build
Date: Wed, 24 Feb 2016 17:55:35 +1100 [thread overview]
Message-ID: <56CD53E7.3010108@gmail.com> (raw)
In-Reply-To: <56CD4FA0.4090109@gmail.com>
<snip>
We need to remove the SQUASH_TOC_SAVE_INSNS bits as well, now that the ppc64_profile_stub_insns does not save r2
> Looks like we are getting closer to the final solution Thanks, Balbir
With the SQUASH_TOC_SAVE_INSNS removed, ftrace function seems to work, but function_graph is broken. I've not yet debugged this.
[ 77.182430] b'Oops: Kernel access of bad area, sig: 11 [#1]'
[ 77.182464] b'SMP NR_CPUS=32 NUMA pSeries'
[ 77.182513] b'Modules linked in: sr_mod cdrom virtio_blk virtio_net ibmvscsi scsi_transport_srp scsi_mod virtio_pci virtio_ring virtio'
[ 77.182661] b'CPU: 1 PID: 2287 Comm: sshd Not tainted 4.5.0-rc4-00007-g1968536-dirty #143'
[ 77.182709] b'task: c000000037b6bc00 ti: c00000003e8c4000 task.ti: c00000003e8c4000'
[ 77.182757] b'NIP: c000000000194ebc LR: c000000000049d4c CTR: d0000000004f1434'
[ 77.182804] b'REGS: c00000003e8c72a0 TRAP: 0300 Not tainted (4.5.0-rc4-00007-g1968536-dirty)'
[ 77.182858] b'MSR: 8000000000009033 <SF,EE,ME,IR,DR,RI,LE> CR: 28282828 XER: 20000000'
[ 77.183008] b'CFAR: c00000000017f400 DAR: d000000000653c70 DSISR: 40000000 SOFTE: 1 '
[ 77.183008] b'GPR00: c000000000009f3c c00000003e8c7520 d0000000004fde40 c00000000077da34 '
[ 77.183008] b'GPR04: d0000000004f1430 c00000003e008100 c00000003719e520 c00000003719e008 '
[ 77.183008] b'GPR08: c00000000113ea50 d00000000064de40 d0000000004f57b8 c000000000009d1c '
[ 77.183008] b'GPR12: c00000000077da34 c00000000fff8400 00000000000005a8 0000000040000000 '
[ 77.183008] b'GPR16: 0000000022000000 00000000000346db c00000003e8c7720 c00000000113fbe0 '
[ 77.183008] b'GPR20: 0000000000000000 c00000000113fbd0 c000000037a9dc00 0000000000000000 '
[ 77.183008] b'GPR24: 0000000000000000 c00000000113fbe0 c000000037077000 c000000037077090 '
[ 77.183008] b'GPR28: c0000000379982d8 d0000000004f1430 c00000000077da34 c000000037077068 '
[ 77.183788] b'NIP [c000000000194ebc] ftrace_graph_is_dead+0xc/0x20'
[ 77.183850] b'LR [c000000000049d4c] prepare_ftrace_return+0x2c/0x110'
---Type <return> to continue, or q <return> to quit---
[ 77.183890] b'Call Trace:'
[ 77.183911] b'[c00000003e8c7520] [c000000037a9dc00] 0xc000000037a9dc00 (unreliable)'
[ 77.183987] b'[c00000003e8c7570] [c000000000009f3c] ftrace_graph_caller+0x34/0x74'
[ 77.184080] b'[c00000003e8c75e0] [c00000000077da34] dev_hard_start_xmit+0x374/0x4e0'
[ 77.184139] b'[c00000003e8c76c0] [c000000000009f7c] return_to_handler+0x0/0x58 (bad_page_fault+0x130/0x150)'
[ 77.184210] b'[c00000003e8c7760] [c000000000009f7c] return_to_handler+0x0/0x58 (handle_page_fault+0x2c/0x30)'
[ 77.184281] b'[c00000003e8c7800] [c000000000009f7c] return_to_handler+0x0/0x58 (sch_direct_xmit+0xe0/0x2d0)'
[ 77.184369] b'[c00000003e8c7860] [c000000000009f7c] return_to_handler+0x0/0x58 (__dev_queue_xmit+0x2d4/0x6a0)'
[ 77.184473] b'[c00000003e8c78f0] [c000000000009f7c] return_to_handler+0x0/0x58 (return_to_handler+0x0/0x58)'
[ 77.184544] b'[c00000003e8c7930] [c000000000009f7c] return_to_handler+0x0/0x58 (ip_finish_output2+0x348/0x420)'
[ 77.184614] b'[c00000003e8c79a0] [c000000000009f7c] return_to_handler+0x0/0x58 (return_to_handler+0x0/0x58)'
[ 77.184684] b'[c00000003e8c7a70] [c000000000009f7c] return_to_handler+0x0/0x58 (ip_output+0xd0/0x160)'
[ 77.184754] b'[c00000003e8c7ae0] [c000000000009f7c] return_to_handler+0x0/0x58 (ip_local_out+0x6c/0x90)'
[ 77.184823] b'[c00000003e8c7b30] [c000000000009f7c] return_to_handler+0x0/0x58 (return_to_handler+0x0/0x58)'
[ 77.184893] b'[c00000003e8c7c00] [c000000000009f7c] return_to_handler+0x0/0x58 (tcp_transmit_skb+0x980/0xa50)'
[ 77.184969] b'[c00000003e8c7c40] [c000000000009f7c] return_to_handler+0x0/0x58 (tcp_write_xmit+0xd9c/0x1120)'
[ 77.185039] b'[c00000003e8c7c60] [c000000000009f7c] return_to_handler+0x0/0x58 (__tcp_push_pending_frames+0x50/0x130)'
[ 77.185117] b'[c00000003e8c7d00] [c000000000009f7c] return_to_handler+0x0/0x58 (tcp_push+0x194/0x1e0)'
[ 77.185192] b'[c00000003e8c7d90] [c000000000009f7c] return_to_handler+0x0/0x58 (tcp_sendmsg+0xa54/0xce0)'
[ 77.185262] b'[c00000003e8c7de0] [c000000000009f7c] return_to_handler+0x0/0x58 (inet_sendmsg+0xd8/0x100)'
[ 77.185342] b'[c00000003e8c7e30] [c000000000009f7c] return_to_handler+0x0/0x58 (sock_sendmsg+0x38/0x60)'
[ 77.185416] b'Instruction dump:'
[ 77.185469] b'60000000 4bfe3b89 60000000 e8610020 38210030 e8010010 7c0803a6 4bffff40 '
[ 77.185566] b'60420000 3c4c00fa 3842e750 3d220015 <88695e30> 4e800020 60000000 60000000 '
[ 77.185668] b'---[ end trace 78e882547ec0a563 ]---'
[ 79.191159] b'Kernel panic - not syncing: Fatal exception in interrupt'
Warm Regards,
Balbir Singh.
next prev parent reply other threads:[~2016-02-24 6:55 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-10 17:29 [PATCH v8 0/8] ftrace with regs + live patching for ppc64 LE (ABI v2) Torsten Duwe
2016-01-28 15:32 ` [PATCH v8 8/8] livepatch: Detect offset for the ftrace location during build Torsten Duwe
2016-02-12 16:13 ` Balbir Singh
2016-02-12 16:45 ` Petr Mladek
2016-02-13 1:33 ` Balbir Singh
2016-02-16 5:47 ` Kamalesh Babulal
2016-02-16 8:23 ` Torsten Duwe
2016-02-16 10:30 ` Kamalesh Babulal
2016-02-16 10:39 ` Torsten Duwe
2016-02-16 13:57 ` Petr Mladek
2016-02-17 3:08 ` Michael Ellerman
2016-02-23 17:00 ` Torsten Duwe
2016-02-24 6:37 ` Balbir Singh
2016-02-24 6:55 ` Balbir Singh [this message]
2016-02-24 9:23 ` Torsten Duwe
2016-02-24 11:22 ` Balbir Singh
2016-02-24 7:51 ` Kamalesh Babulal
2016-02-10 16:21 ` [PATCH v8 1/8] ppc64 (le): prepare for -mprofile-kernel Torsten Duwe
2016-02-17 10:55 ` Michael Ellerman
2016-02-17 11:30 ` Torsten Duwe
2016-02-17 11:39 ` Michael Ellerman
2016-02-10 16:22 ` [PATCH v8 2/8] ppc64le FTRACE_WITH_REGS implementation Torsten Duwe
2016-02-10 16:22 ` [PATCH v8 3/8] ppc use ftrace_modify_all_code default Torsten Duwe
2016-02-10 16:25 ` [PATCH v8 4/8] ppc64 ftrace_with_regs configuration variables Torsten Duwe
2016-02-11 7:48 ` Balbir Singh
2016-02-11 8:39 ` Kamalesh Babulal
2016-02-11 9:35 ` Balbir Singh
2016-02-11 13:00 ` Murali Sampath
2016-02-11 13:00 ` Murali Sampath
2016-02-11 8:42 ` Torsten Duwe
2016-02-11 9:34 ` Balbir Singh
2016-02-15 10:27 ` Michael Ellerman
2016-02-15 12:56 ` Jiri Kosina
2016-02-15 14:04 ` Torsten Duwe
2016-02-15 22:21 ` Torsten Duwe
2016-02-16 4:53 ` Balbir Singh
2016-02-16 10:09 ` Michael Ellerman
2016-02-16 10:35 ` Torsten Duwe
2016-02-10 16:27 ` [PATCH v8 5/8] ppc64 ftrace_with_regs: disable profiling for some files Torsten Duwe
2016-02-10 16:34 ` [PATCH v8 6/8] Implement kernel live patching for ppc64le (ABIv2) Torsten Duwe
2016-02-11 9:01 ` Miroslav Benes
2016-02-10 16:36 ` [PATCH v8 7/8] Enable LIVEPATCH to be configured on ppc64le and add livepatch.o if it is selected Torsten Duwe
2016-02-11 6:18 ` [PATCH v8 0/8] ftrace with regs + live patching for ppc64 LE (ABI v2) Balbir Singh
2016-02-11 8:38 ` Torsten Duwe
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