From: Murilo Opsfelder Araujo <muriloo@linux.ibm.com>
To: Christophe LEROY <christophe.leroy@c-s.fr>
Cc: linux-kernel@vger.kernel.org,
"Alastair D'Silva" <alastair@d-silva.org>,
Andrew Donnellan <andrew.donnellan@au1.ibm.com>,
Balbir Singh <bsingharora@gmail.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Cyril Bur <cyrilbur@gmail.com>,
"Eric W . Biederman" <ebiederm@xmission.com>,
Joe Perches <joe@perches.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Michael Neuling <mikey@neuling.org>,
Nicholas Piggin <npiggin@gmail.com>,
Paul Mackerras <paulus@samba.org>,
Simon Guo <wei.guo.simon@gmail.com>,
Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>,
"Tobin C . Harding" <me@tobin.cc>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH v3 9/9] powerpc/traps: Add line prefix in show_instructions()
Date: Wed, 1 Aug 2018 12:03:50 -0300 [thread overview]
Message-ID: <20180801150350.GC6022@kermit-br-ibm-com> (raw)
In-Reply-To: <c7e0fe17-8c4e-4ccc-dadf-9b320ca5a1d2@c-s.fr>
Hi, Christophe.
On Wed, Aug 01, 2018 at 08:41:15AM +0200, Christophe LEROY wrote:
>
>
> Le 31/07/2018 à 16:50, Murilo Opsfelder Araujo a écrit :
> > Remove "Instruction dump:" line by adding a prefix to display current->comm
> > and current->pid, along with the instructions dump.
> >
> > The prefix can serve as a glue that links the instructions dump to its
> > originator, allowing messages to be interleaved in the logs.
> >
> > Before this patch, a page fault looked like:
> >
> > pandafault[10524]: segfault (11) at 100007d0 nip 1000061c lr 7fffbd295100 code 2 in pandafault[10000000+10000]
> > Instruction dump:
> > 4bfffeec 4bfffee8 3c401002 38427f00 fbe1fff8 f821ffc1 7c3f0b78 3d22fffe
> > 392988d0 f93f0020 e93f0020 39400048 <99490000> 39200000 7d234b78 383f0040
> >
> > After this patch, it looks like:
> >
> > pandafault[10850]: segfault (11) at 100007d0 nip 1000061c lr 7fff9f3e5100 code 2 in pandafault[10000000+10000]
> > pandafault[10850]: code: 4bfffeec 4bfffee8 3c401002 38427f00 fbe1fff8 f821ffc1 7c3f0b78 3d22fffe
> > pandafault[10850]: code: 392988d0 f93f0020 e93f0020 39400048 <99490000> 39200000 7d234b78 383f0040
> >
> > Signed-off-by: Murilo Opsfelder Araujo <muriloo@linux.ibm.com>
>
> Does the script scripts/decode_stacktrace.sh also works with this format
> change ?
I've got more feedback from Michael about this. A better approach would be
having a new show_user_instructions(), a slightly modified version of
show_instructions(), that can be called from within show_signal_msg().
Since _exception_pkey() dies if the exception is in kernel mode, we'll be
safe to call the new show_user_instructions(), without interfering in
scripts/decode_stacktrace.sh.
Cheers
Murilo
prev parent reply other threads:[~2018-08-01 15:04 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-31 14:50 [PATCH v3 0/9] powerpc: Modernize unhandled signals message Murilo Opsfelder Araujo
2018-07-31 14:50 ` [PATCH v3 1/9] powerpc/traps: Print unhandled signals in a separate function Murilo Opsfelder Araujo
2018-07-31 14:50 ` [PATCH v3 2/9] powerpc/traps: Return early in show_signal_msg() Murilo Opsfelder Araujo
2018-07-31 14:50 ` [PATCH v3 3/9] powerpc/traps: Use %lx format " Murilo Opsfelder Araujo
2018-07-31 14:50 ` [PATCH v3 4/9] powerpc/traps: Print VMA for unhandled signals Murilo Opsfelder Araujo
2018-07-31 14:50 ` [PATCH v3 5/9] powerpc/traps: Print signal name " Murilo Opsfelder Araujo
2018-08-01 6:37 ` Christophe LEROY
2018-08-01 7:03 ` Joe Perches
2018-08-01 7:49 ` Segher Boessenkool
2018-08-01 14:44 ` Murilo Opsfelder Araujo
2018-08-01 14:42 ` Murilo Opsfelder Araujo
2018-07-31 14:50 ` [PATCH v3 6/9] powerpc: Do not call __kernel_text_address() in show_instructions() Murilo Opsfelder Araujo
2018-07-31 14:50 ` [PATCH v3 7/9] powerpc: Add stacktrace.h header Murilo Opsfelder Araujo
2018-07-31 14:50 ` [PATCH v3 8/9] powerpc/traps: Show instructions on exceptions Murilo Opsfelder Araujo
2018-07-31 14:50 ` [PATCH v3 9/9] powerpc/traps: Add line prefix in show_instructions() Murilo Opsfelder Araujo
2018-08-01 6:41 ` Christophe LEROY
2018-08-01 14:14 ` Michael Ellerman
2018-08-01 15:03 ` Murilo Opsfelder Araujo [this message]
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