The patch titled
hvc_console: Dont always kick the poll thread in interrupt
has been added to the -mm tree. Its filename is
hvc_console-dont-always-kick-the-poll-thread-in-interrupt.patch
Patches currently in -mm which might be from [EMAIL PROTECTED] are
hvc_console-rearrange-code.patch
hvc_console-match-vio-and-console-devices-using-vterm-numbers.patch
hvc_console-dont-always-kick-the-poll-thread-in-interrupt.patch
hvc_console-magic_sysrq-should-only-be-on-console-channel.patch
hvc_console-unregister-the-console-in-the-exit-routine.patch
hvc_console-add-missing-include.patch
hvc_console-remove-num_vterms-and-some-dead-code.patch
hvc_console-statically-initialize-the-vtermnos-array.patch
hvc_console-add-some-sanity-checks.patch
hvc_console-separate-hvc_console-and-vio-code.patch
hvc_console-separate-hvc_console-and-vio-code-2.patch
hvc_console-register-ops-when-setting-up-hvc_console.patch
hvc_console-separate-the-nul-character-filtering-from-get_hvc_chars.patch
hvc_console-use-hvc_get_chars-in-hvsi-code.patch
From: Milton Miller <[EMAIL PROTECTED]>
Have the hvc console code try to pull characters immediately when receiving an
interrupt, and kick the poll thread only if the immediate poll indicates it
needed a call back to do more work.
Signed-off-by: Milton Miller <[EMAIL PROTECTED]>
Signed-off-by: Anton Blanchard <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
drivers/char/hvc_console.c | 10 +++++++---
1 files changed, 7 insertions(+), 3 deletions(-)
diff -puN
drivers/char/hvc_console.c~hvc_console-dont-always-kick-the-poll-thread-in-interrupt
drivers/char/hvc_console.c
---
25/drivers/char/hvc_console.c~hvc_console-dont-always-kick-the-poll-thread-in-interrupt
Wed Jul 6 14:00:23 2005
+++ 25-akpm/drivers/char/hvc_console.c Wed Jul 6 14:00:23 2005
@@ -254,13 +254,17 @@ static void hvc_kick(void)
wake_up_process(hvc_task);
}
+static int hvc_poll(struct hvc_struct *hp);
+
/*
* NOTE: This API isn't used if the console adapter doesn't support interrupts.
* In this case the console is poll driven.
*/
static irqreturn_t hvc_handle_interrupt(int irq, void *dev_instance, struct
pt_regs *regs)
{
- hvc_kick();
+ /* if hvc_poll request a repoll, then kick the hvcd thread */
+ if (hvc_poll(dev_instance))
+ hvc_kick();
return IRQ_HANDLED;
}
@@ -598,8 +602,8 @@ static int hvc_poll(struct hvc_struct *h
/*
* Account for the total amount read in one loop, and if above
- * 64 bytes, we do a quick schedule loop to let the tty grok the
- * data and eventually throttle us.
+ * 64 bytes, we do a quick schedule loop to let the tty grok
+ * the data and eventually throttle us.
*/
read_total += n;
if (read_total >= 64) {
_
-
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