diff options
| author | Sergey Senozhatsky | 2016-12-27 23:16:08 +0900 |
|---|---|---|
| committer | Petr Mladek | 2017-02-08 13:50:05 +0100 |
| commit | ddb9baa822265b55afffd9815a2758a4b70006c1 (patch) | |
| tree | d3338c3ccee305900f73b29e09f25b4c7efedcb7 /kernel/printk/printk.c | |
| parent | 7acac3445acde1c94054cde69ab53503d296c393 (diff) | |
printk: report lost messages in printk safe/nmi contexts
Account lost messages in pritk-safe and printk-safe-nmi
contexts and report those numbers during printk_safe_flush().
The patch also moves lost message counter to struct
`printk_safe_seq_buf' instead of having dedicated static
counters - this simplifies the code.
Link: http://lkml.kernel.org/r/20161227141611.940-6-sergey.senozhatsky@gmail.com
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Tejun Heo <tj@kernel.org>
Cc: Calvin Owens <calvinowens@fb.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Diffstat (limited to 'kernel/printk/printk.c')
| -rw-r--r-- | kernel/printk/printk.c | 10 |
1 files changed, 0 insertions, 10 deletions
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index f73046f7a6df..6bb77eff502d 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -1677,7 +1677,6 @@ asmlinkage int vprintk_emit(int facility, int level, unsigned long flags; int this_cpu; int printed_len = 0; - int nmi_message_lost; bool in_sched = false; /* cpu currently holding logbuf_lock in this function */ static unsigned int logbuf_cpu = UINT_MAX; @@ -1728,15 +1727,6 @@ asmlinkage int vprintk_emit(int facility, int level, strlen(recursion_msg)); } - nmi_message_lost = get_nmi_message_lost(); - if (unlikely(nmi_message_lost)) { - text_len = scnprintf(textbuf, sizeof(textbuf), - "BAD LUCK: lost %d message(s) from NMI context!", - nmi_message_lost); - printed_len += log_store(0, 2, LOG_PREFIX|LOG_NEWLINE, 0, - NULL, 0, textbuf, text_len); - } - /* * The printf needs to come first; we need the syslog * prefix which might be passed-in as a parameter. |