diff options
Diffstat (limited to 'debian/patches-rt/0280-fs-aio-simple-simple-work.patch')
| -rw-r--r-- | debian/patches-rt/0280-fs-aio-simple-simple-work.patch | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/debian/patches-rt/0280-fs-aio-simple-simple-work.patch b/debian/patches-rt/0280-fs-aio-simple-simple-work.patch new file mode 100644 index 000000000..8bbb8340f --- /dev/null +++ b/debian/patches-rt/0280-fs-aio-simple-simple-work.patch @@ -0,0 +1,76 @@ +From 238624153731bac8138142a9d688f5b51a5f70fe Mon Sep 17 00:00:00 2001 +From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +Date: Mon, 16 Feb 2015 18:49:10 +0100 +Subject: [PATCH 280/347] fs/aio: simple simple work +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.tar.xz + +[ Upstream commit 1a142116f6435ef070ecebb66d2d599507c10601 ] + +|BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:768 +|in_atomic(): 1, irqs_disabled(): 0, pid: 26, name: rcuos/2 +|2 locks held by rcuos/2/26: +| #0: (rcu_callback){.+.+..}, at: [<ffffffff810b1a12>] rcu_nocb_kthread+0x1e2/0x380 +| #1: (rcu_read_lock_sched){.+.+..}, at: [<ffffffff812acd26>] percpu_ref_kill_rcu+0xa6/0x1c0 +|Preemption disabled at:[<ffffffff810b1a93>] rcu_nocb_kthread+0x263/0x380 +|Call Trace: +| [<ffffffff81582e9e>] dump_stack+0x4e/0x9c +| [<ffffffff81077aeb>] __might_sleep+0xfb/0x170 +| [<ffffffff81589304>] rt_spin_lock+0x24/0x70 +| [<ffffffff811c5790>] free_ioctx_users+0x30/0x130 +| [<ffffffff812ace34>] percpu_ref_kill_rcu+0x1b4/0x1c0 +| [<ffffffff810b1a93>] rcu_nocb_kthread+0x263/0x380 +| [<ffffffff8106e046>] kthread+0xd6/0xf0 +| [<ffffffff81591eec>] ret_from_fork+0x7c/0xb0 + +replace this preempt_disable() friendly swork. + +Reported-By: Mike Galbraith <umgwanakikbuti@gmail.com> +Suggested-by: Benjamin LaHaise <bcrl@kvack.org> +Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> +--- + fs/aio.c | 13 +++++++++++-- + 1 file changed, 11 insertions(+), 2 deletions(-) + +diff --git a/fs/aio.c b/fs/aio.c +index 9635c29b83da..303e85033965 100644 +--- a/fs/aio.c ++++ b/fs/aio.c +@@ -121,6 +121,7 @@ struct kioctx { + long nr_pages; + + struct rcu_work free_rwork; /* see free_ioctx() */ ++ struct kthread_work free_kwork; /* see free_ioctx() */ + + /* + * signals when all in-flight requests are done +@@ -608,9 +609,9 @@ static void free_ioctx_reqs(struct percpu_ref *ref) + * and ctx->users has dropped to 0, so we know no more kiocbs can be submitted - + * now it's safe to cancel any that need to be. + */ +-static void free_ioctx_users(struct percpu_ref *ref) ++static void free_ioctx_users_work(struct kthread_work *work) + { +- struct kioctx *ctx = container_of(ref, struct kioctx, users); ++ struct kioctx *ctx = container_of(work, struct kioctx, free_kwork); + struct aio_kiocb *req; + + spin_lock_irq(&ctx->ctx_lock); +@@ -628,6 +629,14 @@ static void free_ioctx_users(struct percpu_ref *ref) + percpu_ref_put(&ctx->reqs); + } + ++static void free_ioctx_users(struct percpu_ref *ref) ++{ ++ struct kioctx *ctx = container_of(ref, struct kioctx, users); ++ ++ kthread_init_work(&ctx->free_kwork, free_ioctx_users_work); ++ kthread_schedule_work(&ctx->free_kwork); ++} ++ + static int ioctx_add_table(struct kioctx *ctx, struct mm_struct *mm) + { + unsigned i, new_nr; +-- +2.36.1 + |