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| -rw-r--r-- | kernel/printk.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/printk.c b/kernel/printk.c index fccacf706f53..051d27e36a6c 100644 --- a/kernel/printk.c +++ b/kernel/printk.c @@ -486,6 +486,9 @@ static int have_callable_console(void) * @fmt: format string * * This is printk(). It can be called from any context. We want it to work. + * Be aware of the fact that if oops_in_progress is not set, we might try to + * wake klogd up which could deadlock on runqueue lock if printk() is called + * from scheduler code. * * We try to grab the console_sem. If we succeed, it's easy - we log the output and * call the console drivers. If we fail to get the semaphore we place the output |