Adding debian version 5.10.209-2.debian/5.10.209-2debian

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 69 insertions, 0 deletions

diff --git a/debian/patches-rt/0231-md-raid5-Make-raid5_percpu-handling-RT-aware.patch b/debian/patches-rt/0231-md-raid5-Make-raid5_percpu-handling-RT-aware.patch
new file mode 100644
index 000000000..33a40d5fc
--- /dev/null
+++ b/debian/patches-rt/0231-md-raid5-Make-raid5_percpu-handling-RT-aware.patch
@@ -0,0 +1,69 @@
+From 4af1829664e98b9b3ec542a03ee30aeee8f47f6c Mon Sep 17 00:00:00 2001
+From: Thomas Gleixner <tglx@linutronix.de>
+Date: Tue, 6 Apr 2010 16:51:31 +0200
+Subject: [PATCH 231/323] md: raid5: Make raid5_percpu handling RT aware
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patches-5.10.204-rt100.tar.xz
+
+__raid_run_ops() disables preemption with get_cpu() around the access
+to the raid5_percpu variables. That causes scheduling while atomic
+spews on RT.
+
+Serialize the access to the percpu data with a lock and keep the code
+preemptible.
+
+Reported-by: Udo van den Heuvel <udovdh@xs4all.nl>
+Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
+Tested-by: Udo van den Heuvel <udovdh@xs4all.nl>
+---
+ drivers/md/raid5.c | 7 +++++--
+ drivers/md/raid5.h | 1 +
+ 2 files changed, 6 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
+index 9f114b9d8dc6..7e0eb8defeaf 100644
+--- a/drivers/md/raid5.c
++++ b/drivers/md/raid5.c
+@@ -2218,8 +2218,9 @@ static void raid_run_ops(struct stripe_head *sh, unsigned long ops_request)
+ 	struct raid5_percpu *percpu;
+ 	unsigned long cpu;
+ 
+-	cpu = get_cpu();
++	cpu = get_cpu_light();
+ 	percpu = per_cpu_ptr(conf->percpu, cpu);
++	spin_lock(&percpu->lock);
+ 	if (test_bit(STRIPE_OP_BIOFILL, &ops_request)) {
+ 		ops_run_biofill(sh);
+ 		overlap_clear++;
+@@ -2278,7 +2279,8 @@ static void raid_run_ops(struct stripe_head *sh, unsigned long ops_request)
+ 			if (test_and_clear_bit(R5_Overlap, &dev->flags))
+ 				wake_up(&sh->raid_conf->wait_for_overlap);
+ 		}
+-	put_cpu();
++	spin_unlock(&percpu->lock);
++	put_cpu_light();
+ }
+ 
+ static void free_stripe(struct kmem_cache *sc, struct stripe_head *sh)
+@@ -7108,6 +7110,7 @@ static int raid456_cpu_up_prepare(unsigned int cpu, struct hlist_node *node)
+ 			__func__, cpu);
+ 		return -ENOMEM;
+ 	}
++	spin_lock_init(&per_cpu_ptr(conf->percpu, cpu)->lock);
+ 	return 0;
+ }
+ 
+diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h
+index 5c05acf20e1f..665fe138ab4f 100644
+--- a/drivers/md/raid5.h
++++ b/drivers/md/raid5.h
+@@ -635,6 +635,7 @@ struct r5conf {
+ 	int			recovery_disabled;
+ 	/* per cpu variables */
+ 	struct raid5_percpu {
++		spinlock_t	lock;		/* Protection for -RT */
+ 		struct page	*spare_page; /* Used when checking P/Q in raid6 */
+ 		void		*scribble;  /* space for constructing buffer
+ 					     * lists and performing address
+-- 
+2.43.0
+