linux-kernel - [PATCH v3 1/7] printk: report dropped messages on separate line

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1405692859-32500-2-git-send-email-elder@linaro.org>
Date:	Fri, 18 Jul 2014 09:14:13 -0500
From:	Alex Elder <elder@...aro.org>
To:	akpm@...ux-foundation.org
Cc:	kay@...y.org, pmladek@...e.cz, bp@...e.de, john.stultz@...aro.org,
	jack@...e.cz, linux-kernel@...r.kernel.org
Subject: [PATCH v3 1/7] printk: report dropped messages on separate line

It is possible for the log to be filled too quickly for the consoles
to be able to keep up.  This is detected in console_unlock(), and
when it occurs, a message is printed on the console.  When reviewing
some nearby code, Petr Mládek suggested it might be nicer if this
message were placed on a separate line.  This patch implements that
suggestion.

Suggested-by: Petr Mládek <pmladek@...e.cz>
Signed-off-by: Alex Elder <elder@...aro.org>
---
 kernel/printk/printk.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 13e839d..bed8f09 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -2142,9 +2142,10 @@ again:
 		}
 
 		if (console_seq < log_first_seq) {
-			len = sprintf(text, "** %u printk messages dropped ** ",
+			len = sprintf(text,
+				      "%s** %llu printk messages dropped **\n",
+				      (console_prev & LOG_CONT) ? "\n" : "",
 				      (unsigned)(log_first_seq - console_seq));
-
 			/* messages are gone, move to first one */
 			console_seq = log_first_seq;
 			console_idx = log_first_idx;
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/