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authorAnton Blanchard <anton@samba.org>2010-02-07 14:44:16 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2010-02-09 13:56:06 +1100
commit66fcb1059deeae072c1bf1536a8e2613028bce3e (patch)
tree99390b75ec2b292a97fcf880e1f6752d27eb80fc /arch/powerpc/kernel/traps.c
parentb926a88a7b77bc27c0e7f67166f34b854fe21ccc (diff)
powerpc: Add last sysfs file and dump of ftrace buffer to oops printout
Add printout of last accessed sysfs file, added to x86 in ae87221d3ce49d9de1e43756da834fd0bf05a2ad (sysfs: crash debugging) Also add the notify_die hook that allows us to print out the ftrace buffer on oops. This is useful in conjunction with ftrace function_graph: Oops: Kernel access of bad area, sig: 11 [#1] SMP NR_CPUS=128 NUMA pSeries last sysfs file: /sys/class/net/tunl0/type Dumping ftrace buffer: ... 0) | .sysrq_handle_crash() { 0) 0.476 us | .hash_page(); 0) 0.488 us | .xmon_fault_handler(); 0) | .bad_page_fault() { 0) | .search_exception_tables() { 0) 0.590 us | .search_module_extables(); 0) 2.546 us | } 0) | .printk() { 0) | .vprintk() { 0) 0.488 us | ._raw_spin_lock(); 0) 0.572 us | .emit_log_char(); Showing the function graph of a sysrq-c crash. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/traps.c')
-rw-r--r--arch/powerpc/kernel/traps.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 4588d1eb18d..0a320dbd950 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -146,6 +146,11 @@ int die(const char *str, struct pt_regs *regs, long err)
#endif
printk("%s\n", ppc_md.name ? ppc_md.name : "");
+ sysfs_printk_last_file();
+ if (notify_die(DIE_OOPS, str, regs, err, 255,
+ SIGSEGV) == NOTIFY_STOP)
+ return 1;
+
print_modules();
show_regs(regs);
} else {