Re: Random crashes with 2.6.27-rc3 on PPC
flat view
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: 2008-08-24 22:40:18
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Possibly related (same subject, not in this thread)
- 2008-08-24 · Re: Random crashes with 2.6.27-rc3 on PPC · Benjamin Herrenschmidt <benh@kernel.crashing.org>
- 2008-08-24 · Re: Random crashes with 2.6.27-rc3 on PPC · Michael Buesch <hidden>
- 2008-08-24 · Re: Random crashes with 2.6.27-rc3 on PPC · Michael Buesch <hidden>
- 2008-08-23 · Re: Random crashes with 2.6.27-rc3 on PPC · Benjamin Herrenschmidt <benh@kernel.crashing.org>
- 2008-08-23 · Re: Random crashes with 2.6.27-rc3 on PPC · Arnaud Ebalard <hidden>
On Sun, 2008-08-24 at 16:46 +0200, Andreas Schwab wrote:
Michael Buesch [off-list ref] writes:quoted
The following workaround seems to fix the crashes on powerpc. However, this patch is clearly not what we want for other architectures, as they might need -fno-omit-frame-pointer to function properly.This has a better chance to be accepted. :-)
Unfortunately, that won't solve the FTRACE problem. Ben.
quoted hunk ↗ jump to hunk
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 8b5a7d3..f9a2e48 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug@@ -394,7 +394,7 @@ config LOCKDEP bool depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT select STACKTRACE - select FRAME_POINTER if !X86 && !MIPS + select FRAME_POINTER if !X86 && !MIPS && !PPC select KALLSYMS select KALLSYMS_ALLquoted
Index: linux-2.6/kernel/Makefile ===================================================================--- linux-2.6.orig/kernel/Makefile 2008-08-24 11:50:23.000000000 +0200 +++ linux-2.6/kernel/Makefile 2008-08-24 12:15:54.000000000 +0200@@ -92,13 +92,13 @@ obj-$(CONFIG_SMP) += sched_cpupri.o ifneq ($(CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER),y) # According to Alan Modra <alan@linuxcare.com.au>, the -fno-omit-frame-pointer is # needed for x86 only. Why this used to be enabled for all architectures is beyond # me. I suspect most platforms don't need this, but until we know that for sure # I turn this off for IA-64 only. Andreas Schwab says it's also needed on m68k # to get a correct value for the wait-channel (WCHAN in ps). --davidm -CFLAGS_sched.o := $(PROFILING) -fno-omit-frame-pointer +CFLAGS_sched.o := $(PROFILING)CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER is already enabled on powerpc. Andreas.