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linux: revert softirq commit, temporarily fix DVB issues

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See: https://forum.libreelec.tv/thread/4235-dvb-issue-since-le-switched-to-kernel-4-9-x/?postID=75965#post75965
This commit is contained in:
MilhouseVH 2018-01-04 20:11:38 +00:00 committed by chewitt
parent 0793708613
commit 728a03c9c5
2 changed files with 108 additions and 0 deletions
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54
packages/linux/patches/default-rpi/linux-999-revert-softirq-let-ksoftirqd-do-its-job.patch Normal file
View File

@ -0,0 +1,54 @@
From 3364d0056328b93fb10ab929ae99933af9e304ad Mon Sep 17 00:00:00 2001
From: MilhouseVH <milhouseVH.github@nmacleod.com>
Date: Thu, 4 Jan 2018 19:56:05 +0000
Subject: [PATCH] Revert "softirq: Let ksoftirqd do its job"
See: https://forum.libreelec.tv/thread/4235-dvb-issue-since-le-switched-to-kernel-4-9-x/?postID=75965#post75965
---
kernel/softirq.c | 16 +---------------
1 file changed, 1 insertion(+), 15 deletions(-)
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 4e09821..58bb6f6 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -77,17 +77,6 @@ static void wakeup_softirqd(void)
wake_up_process(tsk);
}
-/*
- * If ksoftirqd is scheduled, we do not want to process pending softirqs
- * right now. Let ksoftirqd handle this at its own rate, to get fairness.
- */
-static bool ksoftirqd_running(void)
-{
- struct task_struct *tsk = __this_cpu_read(ksoftirqd);
-
- return tsk && (tsk->state == TASK_RUNNING);
-}
-
/*
* preempt_count and SOFTIRQ_OFFSET usage:
* - preempt_count is changed by SOFTIRQ_OFFSET on entering or leaving
@@ -324,7 +313,7 @@ asmlinkage __visible void do_softirq(void)
pending = local_softirq_pending();
- if (pending && !ksoftirqd_running())
+ if (pending)
do_softirq_own_stack();
local_irq_restore(flags);
@@ -351,9 +340,6 @@ void irq_enter(void)
static inline void invoke_softirq(void)
{
- if (ksoftirqd_running())
- return;
-
if (!force_irqthreads) {
#ifdef CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK
/*
--
2.14.1

54
packages/linux/patches/default/linux-999-revert-softirq-let-ksoftirqd-do-its-job.patch Normal file
View File

@ -0,0 +1,54 @@
From 3364d0056328b93fb10ab929ae99933af9e304ad Mon Sep 17 00:00:00 2001
From: MilhouseVH <milhouseVH.github@nmacleod.com>
Date: Thu, 4 Jan 2018 19:56:05 +0000
Subject: [PATCH] Revert "softirq: Let ksoftirqd do its job"
See: https://forum.libreelec.tv/thread/4235-dvb-issue-since-le-switched-to-kernel-4-9-x/?postID=75965#post75965
---
kernel/softirq.c | 16 +---------------
1 file changed, 1 insertion(+), 15 deletions(-)
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 4e09821..58bb6f6 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -77,17 +77,6 @@ static void wakeup_softirqd(void)
wake_up_process(tsk);
}
-/*
- * If ksoftirqd is scheduled, we do not want to process pending softirqs
- * right now. Let ksoftirqd handle this at its own rate, to get fairness.
- */
-static bool ksoftirqd_running(void)
-{
- struct task_struct *tsk = __this_cpu_read(ksoftirqd);
-
- return tsk && (tsk->state == TASK_RUNNING);
-}
-
/*
* preempt_count and SOFTIRQ_OFFSET usage:
* - preempt_count is changed by SOFTIRQ_OFFSET on entering or leaving
@@ -324,7 +313,7 @@ asmlinkage __visible void do_softirq(void)
pending = local_softirq_pending();
- if (pending && !ksoftirqd_running())
+ if (pending)
do_softirq_own_stack();
local_irq_restore(flags);
@@ -351,9 +340,6 @@ void irq_enter(void)
static inline void invoke_softirq(void)
{
- if (ksoftirqd_running())
- return;
-
if (!force_irqthreads) {
#ifdef CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK
/*
--
2.14.1