Please merge to v5.0/standard/preempt-rt/base and
v5.0/standard/preempt-rt/intel-x86
--Hongzhi
On 4/23/19 11:14 AM, Hongzhi.Song wrote:
Two commits from rt-kernel cause the following disorder log at the
early stage of boot with qemux86-64. Maybe it has other disorder logs
which I omit.
Commits:
7128a815: printk: introduce emergency messages
b9d460e4: serial: 8250: implement write_atomic
[ 0.401166] 000: 6200.04 BogoMIPS (lpj=3100023)
[ 0.877953] 000: Intel(R) Core(TM)2 Duo CPU T7700 @ 2.40GHz
[ 0.877953] 000: (family: 0x6, model: 0xf
[ 0.877953] 000: , stepping: 0xb)
[ 1.255009] 000: 5
[ 1.255167] 000: *10
[ 1.255295] 000: 11
[ 1.255406] 000: )
Obviously, the printk emergency mechanism doesn't work as expected.
Removing partial code of printk emergency mechanism can
fix the issue temporarily.
Signed-off-by: Hongzhi.Song <hongzhi.s...@windriver.com>
---
kernel/printk/printk.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 997d07b..99d4a94 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -1726,6 +1726,7 @@ static void call_console_drivers(u64 seq, const char
*ext_text, size_t ext_len,
con->wrote_history = 1;
con->printk_seq = seq - 1;
}
+#if 0
if (con->write_atomic && level < emergency_console_loglevel &&
facility == 0) {
/* skip emergency messages, already printed */
@@ -1733,6 +1734,7 @@ static void call_console_drivers(u64 seq, const char
*ext_text, size_t ext_len,
con->printk_seq = seq;
continue;
}
+#endif
if (con->flags & CON_BOOT && facility == 0) {
/* skip emergency messages, already printed */
if (con->printk_seq < seq)
@@ -3134,10 +3136,12 @@ static void call_emergency_console_drivers(int level,
const char *text,
for_each_console(con) {
if (!(con->flags & CON_ENABLED))
continue;
+#if 0
if (con->write_atomic && level < emergency_console_loglevel) {
con->write_atomic(con, text, text_len);
continue;
}
+#endif
if (con->write && (con->flags & CON_BOOT)) {
con->write(con, text, text_len);
continue;
--
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