linux-kernel - [PATCH v3 1/2] main: kernel_start: move housekeeping_init() before workqueue_init

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Date:   Fri,  3 Nov 2017 17:27:49 +0200
From:   Tal Shorer <tal.shorer@...il.com>
To:     tj@...nel.org
Cc:     sfr@...b.auug.org.au, tglx@...utronix.de, mingo@...e.hu,
        hpa@...or.com, peterz@...radead.org, linux-next@...r.kernel.org,
        linux-kernel@...r.kernel.org, tal.shorer@...il.com,
        frederic@...nel.org
Subject: [PATCH v3 1/2] main: kernel_start: move housekeeping_init() before workqueue_init_early()

This is needed in order to allow the unbound workqueue to take
housekeeping cpus into accounty

Signed-off-by: Tal Shorer <tal.shorer@...il.com>
---
 init/main.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/init/main.c b/init/main.c
index 4610c99..af6ecd0 100644
--- a/init/main.c
+++ b/init/main.c
@@ -591,6 +591,12 @@ asmlinkage __visible void __init start_kernel(void)
 	radix_tree_init();
 
 	/*
+	 * Set up housekeeping before setting up workqueues to allow the unbound
+	 * workqueue to take non-housekeeping into account.
+	 */
+	housekeeping_init();
+
+	/*
 	 * Allow workqueue creation and work item queueing/cancelling
 	 * early.  Work item execution depends on kthreads and starts after
 	 * workqueue_init().
@@ -607,7 +613,6 @@ asmlinkage __visible void __init start_kernel(void)
 	early_irq_init();
 	init_IRQ();
 	tick_init();
-	housekeeping_init();
 	rcu_init_nohz();
 	init_timers();
 	hrtimers_init();
-- 
2.7.4