When touch_nmi_watchdog() was added to inside the wait loop in
wait_for_xmitr()[1], where the long delays come from, a unneeded
touch_nmi_watchdog() call was left in the beginning of
serial8250_console_write() (introduced in
78512ece148992a5c00c63fbf4404f3cde635016) and this patch reverts it.
[1] http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.18-rc6/2.6.18-rc6-mm2/broken-out/tickle-nmi-watchdog-on-serial-output.patch
http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.18-rc6/2.6.18-rc6-mm2/broken-out/tickle-nmi-watchdog-on-serial-output-fix.patch
[2] http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=78512ece148992a5c00c63fbf4404f3cde635016;hp=0ad775dbba12de3b7d25f586efe81ad995ca75a7
Signed-off-by: Aristeu S. Rozanski F. <[email protected]>
--- mm.orig/drivers/serial/8250.c 2006-09-13 17:26:53.000000000 -0300
+++ mm/drivers/serial/8250.c 2006-09-13 17:27:14.000000000 -0300
@@ -2263,8 +2263,6 @@
unsigned int ier;
int locked = 1;
- touch_nmi_watchdog();
-
local_irq_save(flags);
if (up->port.sysrq) {
/* serial8250_handle_port() already took the lock */
-
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