Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=71c339116a216b181fc5e203ef51a033fe5e38cf
Commit: 71c339116a216b181fc5e203ef51a033fe5e38cf
Parent: 79b4cc5ee7a8086ac2c9c0afa52e6d687ce1ffef
Author: Arjan van de Ven <[EMAIL PROTECTED]>
AuthorDate: Wed Jan 30 13:32:50 2008 +0100
Committer: Ingo Molnar <[EMAIL PROTECTED]>
CommitDate: Wed Jan 30 13:32:50 2008 +0100
debug: add the end-of-trace marker and the module list to
Unlike oopses, WARN_ON() currently does't print the loaded modules list.
This makes it harder to take action on certain bug reports. For example,
recently there were a set of WARN_ON()s reported in the mac80211 stack,
which were just signalling a driver bug. It takes then anther round trip
to the bug reporter (if he responds at all) to find out which driver
is at fault.
Another issue is that, unlike oopses, WARN_ON() doesn't currently printk
the helpful "cut here" line, nor the "end of trace" marker.
Now that WARN_ON() is out of line, the size increase due to this is
minimal and it's worth adding.
Signed-off-by: Arjan van de Ven <[EMAIL PROTECTED]>
Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
Signed-off-by: Thomas Gleixner <[EMAIL PROTECTED]>
---
kernel/panic.c | 16 ++++++++++++----
1 files changed, 12 insertions(+), 4 deletions(-)
diff --git a/kernel/panic.c b/kernel/panic.c
index 0ebea43..d9e90cf 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -281,6 +281,13 @@ static int init_oops_id(void)
}
late_initcall(init_oops_id);
+static void print_oops_end_marker(void)
+{
+ init_oops_id();
+ printk(KERN_WARNING "---[ end trace %016llx ]---\n",
+ (unsigned long long)oops_id);
+}
+
/*
* Called when the architecture exits its oops handler, after printing
* everything.
@@ -288,9 +295,7 @@ late_initcall(init_oops_id);
void oops_exit(void)
{
do_oops_enter_exit();
- init_oops_id();
- printk(KERN_WARNING "---[ end trace %016llx ]---\n",
- (unsigned long long)oops_id);
+ print_oops_end_marker();
}
#ifdef WANT_WARN_ON_SLOWPATH
@@ -298,11 +303,14 @@ void warn_on_slowpath(const char *file, int line)
{
char function[KSYM_SYMBOL_LEN];
unsigned long caller = (unsigned long) __builtin_return_address(0);
-
sprint_symbol(function, caller);
+
+ printk(KERN_WARNING "------------[ cut here ]------------\n");
printk(KERN_WARNING "WARNING: at %s:%d %s()\n", file,
line, function);
+ print_modules();
dump_stack();
+ print_oops_end_marker();
}
EXPORT_SYMBOL(warn_on_slowpath);
#endif
-
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