From: Michael Ellerman <mpe@ellerman.id.au>
To: Oliver O'Halloran <oohall@gmail.com>, linuxppc-dev@lists.ozlabs.org
Cc: Oliver O'Halloran <oohall@gmail.com>
Subject: Re: [PATCH 7/7] powerpc/eeh: Add eeh_force_recover to debugfs
Date: Fri, 08 Feb 2019 23:31:57 +1100 [thread overview]
Message-ID: <87tvheihqa.fsf@concordia.ellerman.id.au> (raw)
In-Reply-To: <20190208030802.10805-7-oohall@gmail.com>
Oliver O'Halloran <oohall@gmail.com> writes:
> This patch adds a debugfs interface to force scheduling a recovery event.
> This can be used to recover a specific PE or schedule a "special" recovery
> even that checks for errors at the PHB level.
> To force a recovery of a normal PE, use:
>
> echo '<#pe>:<#phb>' > /sys/kernel/debug/powerpc/eeh_force_recover
>
> To force a scan broken PHBs:
>
> echo 'null' > /sys/kernel/debug/powerpc/eeh_force_recover
Why 'null', that seems like an odd choice. Why not "all" or "scan" or
something?
Also it oopsed on me:
[ 76.323164] sending failure event
[ 76.323421] BUG: Unable to handle kernel instruction fetch (NULL pointer?)
[ 76.323655] Faulting instruction address: 0x00000000
[ 76.323856] Oops: Kernel access of bad area, sig: 11 [#1]
[ 76.323946] LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries
[ 76.324295] Modules linked in: vmx_crypto kvm binfmt_misc ip_tables x_tables autofs4 crc32c_vpmsum
[ 76.324669] CPU: 2 PID: 97 Comm: eehd Not tainted 5.0.0-rc2-gcc-8.2.0-00080-gfacc0d1d9517 #435
[ 76.325054] NIP: 0000000000000000 LR: c0000000000451f8 CTR: 0000000000000000
[ 76.325402] REGS: c0000000fec779c0 TRAP: 0400 Not tainted (5.0.0-rc2-gcc-8.2.0-00080-gfacc0d1d9517)
[ 76.325768] MSR: 800000014280b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE,TM[E]> CR: 24000482 XER: 20000000
[ 76.326243] CFAR: c000000000002528 IRQMASK: 0
[ 76.326243] GPR00: c000000000045edc c0000000fec77c50 c000000001574000 c0000000fec77cb0
[ 76.326243] GPR04: 0000000000000000 00177d76e3e321bc 00177d76e4293a1f 5deadbeef0000100
[ 76.326243] GPR08: 5deadbeef0000200 0000000000000000 0000000000000000 00177d76e3e3216b
[ 76.326243] GPR12: 0000000000000000 c00000003fffdf00 c0000000001438a8 c0000000fe211700
[ 76.326243] GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[ 76.326243] GPR20: 0000000000000000 0000000000000000 0000000000000000 c000000000e814e8
[ 76.326243] GPR24: c000000000e814c0 5deadbeef0000100 c000000001622480 0000000100000000
[ 76.326243] GPR28: c000000001413310 c0000000016244e0 c0000000014132f0 c0000001f84246a0
[ 76.329073] NIP [0000000000000000] (null)
[ 76.329285] LR [c0000000000451f8] eeh_handle_special_event+0x78/0x348
[ 76.329602] Call Trace:
[ 76.329762] [c0000000fec77c50] [c0000000fec77ce0] 0xc0000000fec77ce0 (unreliable)
[ 76.330113] [c0000000fec77d00] [c000000000045edc] eeh_event_handler+0x10c/0x1c0
[ 76.330464] [c0000000fec77db0] [c000000000143a4c] kthread+0x1ac/0x1c0
[ 76.330681] [c0000000fec77e20] [c00000000000bdc4] ret_from_kernel_thread+0x5c/0x78
[ 76.331026] Instruction dump:
[ 76.331197] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
[ 76.331550] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
[ 76.331803] ---[ end trace dc73d37df5bb9ecd ]---
cheers
next prev parent reply other threads:[~2019-02-08 12:34 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-08 3:07 [PATCH 1/7] powerpc/eeh: Use debugfs_create_u32 for eeh_max_freezes Oliver O'Halloran
2019-02-08 3:07 ` [PATCH 2/7] powerpc/eeh_cache: Add pr_debug() prints for insert/remove Oliver O'Halloran
2019-02-08 3:07 ` [PATCH 3/7] powerpc/eeh_cache: Add a way to dump the EEH address cache Oliver O'Halloran
2019-02-08 9:00 ` kbuild test robot
2019-02-08 9:47 ` Michael Ellerman
2019-02-08 13:14 ` Oliver
2019-02-11 2:16 ` Michael Ellerman
2019-02-08 3:07 ` [PATCH 4/7] powerpc/eeh_cache: Bump log level of eeh_addr_cache_print() Oliver O'Halloran
2019-02-08 3:08 ` [PATCH 5/7] powerpc/pci: Add pci_find_hose_for_domain() Oliver O'Halloran
2019-02-08 9:57 ` Michael Ellerman
2019-02-08 12:53 ` Oliver
2019-02-08 3:08 ` [PATCH 6/7] powerpc/eeh: Allow disabling recovery Oliver O'Halloran
2019-02-08 9:58 ` Michael Ellerman
2019-02-08 12:52 ` Oliver
2019-02-08 3:08 ` [PATCH 7/7] powerpc/eeh: Add eeh_force_recover to debugfs Oliver O'Halloran
2019-02-08 12:31 ` Michael Ellerman [this message]
2019-02-08 12:50 ` Oliver
2019-02-11 2:24 ` Michael Ellerman
2019-02-13 4:37 ` Sam Bobroff
2019-02-13 5:18 ` Oliver
2019-02-08 9:38 ` [PATCH 1/7] powerpc/eeh: Use debugfs_create_u32 for eeh_max_freezes Michael Ellerman
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