Steven Rostedt wrote:
On Tue, 2009-10-06 at 07:20 +1100, Benjamin Herrenschmidt wrote:
On Mon, 2009-10-05 at 09:25 -0400, Steven Rostedt wrote:
Sachin, can you give me more details on how you built that kernel ? (or
give them again in case I missed them the first time around :-), ie,
On Wed, 2009-10-07 at 14:26 +0530, Sachin Sant wrote:
As Ben suggested, i changed LOAD_REG_IMMEDIATE() to LOAD_REG_ADDR()
as follows.
- LOAD_REG_IMMEDIATE(r4,ftrace_return_to_handler)
+ LOAD_REG_ADDR(r4,ftrace_return_to_handler)
With this change compile time warnings about
On Mon, 2009-10-05 at 09:25 -0400, Steven Rostedt wrote:
Sachin, can you give me more details on how you built that kernel ? (or
give them again in case I missed them the first time around :-), ie,
what toolchain, options, etc... or even better, give me remote access to
the build host
On Tue, 2009-10-06 at 07:20 +1100, Benjamin Herrenschmidt wrote:
On Mon, 2009-10-05 at 09:25 -0400, Steven Rostedt wrote:
Sachin, can you give me more details on how you built that kernel ? (or
give them again in case I missed them the first time around :-), ie,
what toolchain,
On Mon, 2009-09-14 at 06:25 +1000, Benjamin Herrenschmidt wrote:
.../...
Something is totally messed up here.
Could it be that we don't handle R_PPC64_ADDR16_* relocs in
arch/powerpc/kernel/modules/module_64.c ?
Sachin, do you see a bunch of Unknown ADD relocation in
On Sun, 2009-09-13 at 14:37 +1000, Benjamin Herrenschmidt wrote:
On Sun, 2009-09-13 at 00:07 -0400, Steven Rostedt wrote:
982: R_PPC64_ADDR16_HIGHEST
ftrace_return_to_handler
984: 60 84 00 00 ori r4,r4,0
986: R_PPC64_ADDR16_HIGHER
.../...
Something is totally messed up here.
Could it be that we don't handle R_PPC64_ADDR16_* relocs in
arch/powerpc/kernel/modules/module_64.c ?
Sachin, do you see a bunch of Unknown ADD relocation in your dmesg ?
Ben,
The thing is, this is kernel proper. This code is
On Wed, 2009-09-09 at 11:57 +0530, Sachin Sant wrote:
Steven Rostedt wrote:
I'm going through old email, and I found this. Do you still see this
error. I don't recall seeing it myself.
I can still recreate this with 31-rc9. When i enable tracing
with function_graph i notice the
On Sun, 2009-09-13 at 00:07 -0400, Steven Rostedt wrote:
982: R_PPC64_ADDR16_HIGHEST
ftrace_return_to_handler
984: 60 84 00 00 ori r4,r4,0
986: R_PPC64_ADDR16_HIGHER
ftrace_return_to_handler
988: 78 84 07 c6 rldicr r4,r4,32,31
On Thu, 2009-09-10 at 11:02 +0530, Sachin Sant wrote:
Steven Rostedt wrote:
Ah, seems the bug happens to be in the module handling. Does the call
back always have .mod_return_to_handler?
Yes. Every time it ends up in .mod_return_to_handler
Hmm, I still can not reproduce it, and I've
On Thu, 2009-09-10 at 11:02 +0530, Sachin Sant wrote:
Steven Rostedt wrote:
Ah, seems the bug happens to be in the module handling. Does the call
back always have .mod_return_to_handler?
Yes. Every time it ends up in .mod_return_to_handler
BTW, do you have CONFIG_IRQSTACK set?
--
Steven Rostedt wrote:
On Thu, 2009-09-10 at 11:02 +0530, Sachin Sant wrote:
Steven Rostedt wrote:
Ah, seems the bug happens to be in the module handling. Does the call
back always have .mod_return_to_handler?
Yes. Every time it ends up in .mod_return_to_handler
BTW,
Steven Rostedt wrote:
I'm going through old email, and I found this. Do you still see this
error. I don't recall seeing it myself.
I can still recreate this with 31-rc9. When i enable tracing
with function_graph i notice the following oops. This happens
only once. Later if i try to
On Wed, 2009-09-09 at 11:57 +0530, Sachin Sant wrote:
Steven Rostedt wrote:
I'm going through old email, and I found this. Do you still see this
error. I don't recall seeing it myself.
I can still recreate this with 31-rc9. When i enable tracing
with function_graph i notice the
Steven Rostedt wrote:
Ah, seems the bug happens to be in the module handling. Does the call
back always have .mod_return_to_handler?
Yes. Every time it ends up in .mod_return_to_handler
Thanks
-Sachin
This doesn't surprise me any. The module code is a bit harry, and
function graph does
On Mon, 2009-08-03 at 16:10 +0530, Sachin Sant wrote:
Steven Rostedt wrote:
Thanks,
I've seen issues with my PPC box and function graph, but the bugs were
also caused by other changes. I'll boot up my PPC64 box and see if
I see the same issues you have.
Hi Steven,
I can still
Steven Rostedt wrote:
Thanks,
I've seen issues with my PPC box and function graph, but the bugs were
also caused by other changes. I'll boot up my PPC64 box and see if
I see the same issues you have.
Hi Steven,
I can still recreate this issue with 2.6.31-rc5. Let me know
if i can provide
On Tue, 14 Jul 2009, Sachin Sant wrote:
While enabling function_graph tracer on a Power6 box, machine
crashed with following trace. Kernel version is 2.6.31-rc3.
Thanks,
I've seen issues with my PPC box and function graph, but the bugs were
also caused by other changes. I'll boot up my PPC64
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