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| author | Doug Chapman <doug.chapman@hp.com> | 2009-01-15 10:38:56 -0800 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2009-01-15 10:38:56 -0800 |
| commit | 88fc241f54459ac3d86c5e13b449730199f66061 (patch) | |
| tree | d8148e145e9252b76b12b8d466ff3ecbfa4222ea /kernel/sysctl.c | |
| parent | 0773a6cf673316440999752e23f8c3d4f85e48b9 (diff) | |
| download | lwn-88fc241f54459ac3d86c5e13b449730199f66061.tar.gz lwn-88fc241f54459ac3d86c5e13b449730199f66061.zip | |
[IA64] dump stack on kernel unaligned warnings
Often the cause of kernel unaligned access warnings is not
obvious from just the ip displayed in the warning. This adds
the option via proc to dump the stack in addition to the warning.
The default is off (just display the 1 line warning). To enable
the stack to be shown: echo 1 > /proc/sys/kernel/unaligned-dump-stack
Signed-off-by: Doug Chapman <doug.chapman@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'kernel/sysctl.c')
| -rw-r--r-- | kernel/sysctl.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 3e38b74b6124..368d1638ee78 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -144,6 +144,7 @@ extern int acct_parm[]; #ifdef CONFIG_IA64 extern int no_unaligned_warning; +extern int unaligned_dump_stack; #endif #ifdef CONFIG_RT_MUTEXES @@ -781,6 +782,14 @@ static struct ctl_table kern_table[] = { .mode = 0644, .proc_handler = &proc_dointvec, }, + { + .ctl_name = CTL_UNNUMBERED, + .procname = "unaligned-dump-stack", + .data = &unaligned_dump_stack, + .maxlen = sizeof (int), + .mode = 0644, + .proc_handler = &proc_dointvec, + }, #endif #ifdef CONFIG_DETECT_SOFTLOCKUP { |