diff options
| author | Sergey Senozhatsky <sergey.senozhatsky@gmail.com> | 2018-10-02 11:38:36 +0900 |
|---|---|---|
| committer | Petr Mladek <pmladek@suse.com> | 2018-10-12 10:03:39 +0200 |
| commit | 0e96a19c4450253c3ddcff69140b1096f2c2adaf (patch) | |
| tree | 34c8f6ef6c27265137829d293e5f36e3480a2232 /kernel/printk | |
| parent | 3ac37a93fa9217e576bebfd4ba3e80edaaeb2289 (diff) | |
| download | linux-0e96a19c4450253c3ddcff69140b1096f2c2adaf.tar.bz2 | |
printk: do not preliminary split up cont buffer
We have a proper 'overflow' check which tells us that we need to
split up existing cont buffer in separate records:
if (cont.len + len > sizeof(cont.buf))
cont_flush();
At the same time we also have one extra flush: "if cont buffer is
80% full then split it up" in cont_add():
if (cont.len > (sizeof(cont.buf) * 80) / 100)
cont_flush();
This looks to be redundant, since the existing "overflow" check
should work just fine, so remove this 80% check and wait for either
a normal cont termination \n, for preliminary flush due to
possible buffer overflow or for preliminary flush due to cont race.
Link: http://lkml.kernel.org/r/20181002023836.4487-4-sergey.senozhatsky@gmail.com
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: Tejun Heo <tj@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: LKML <linux-kernel@vger.kernel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Diffstat (limited to 'kernel/printk')
| -rw-r--r-- | kernel/printk/printk.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index e9a7e50ed60a..505663bb4f1f 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -1796,9 +1796,6 @@ static bool cont_add(int facility, int level, enum log_flags flags, const char * cont_flush(); } - if (cont.len > (sizeof(cont.buf) * 80) / 100) - cont_flush(); - return true; } |