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authorIngo Molnar <mingo@elte.hu>2012-03-12 20:44:07 +0100
committerIngo Molnar <mingo@elte.hu>2012-03-12 20:44:11 +0100
commit35239e23c66f1614c76739b62a299c3c92d6eb68 (patch)
tree7b1e068df888ec9a00b43c1dd7517a6490da6a94 /kernel/printk.c
parent3f33ab1c0c741bfab2138c14ba1918a7905a1e8b (diff)
parent87e24f4b67e68d9fd8df16e0bf9c66d1ad2a2533 (diff)
downloadlinux-35239e23c66f1614c76739b62a299c3c92d6eb68.tar.bz2
Merge branch 'perf/urgent' into perf/core
Merge reason: We are going to queue up a dependent patch. Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/printk.c')
-rw-r--r--kernel/printk.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/printk.c b/kernel/printk.c
index cb8a6bd697c6..0b3ea2cbd5fb 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -707,6 +707,9 @@ static bool printk_time = 0;
#endif
module_param_named(time, printk_time, bool, S_IRUGO | S_IWUSR);
+static bool always_kmsg_dump;
+module_param_named(always_kmsg_dump, always_kmsg_dump, bool, S_IRUGO | S_IWUSR);
+
/* Check if we have any console registered that can be called early in boot. */
static int have_callable_console(void)
{
@@ -1737,6 +1740,9 @@ void kmsg_dump(enum kmsg_dump_reason reason)
unsigned long l1, l2;
unsigned long flags;
+ if ((reason > KMSG_DUMP_OOPS) && !always_kmsg_dump)
+ return;
+
/* Theoretically, the log could move on after we do this, but
there's not a lot we can do about that. The new messages
will overwrite the start of what we dump. */