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Paul E. McKenney 477a64e62f cpu: Defer smpboot kthread unparking until CPU known to scheduler ... commit 00df35f991 upstream. Currently, smpboot_unpark_threads() is invoked before the incoming CPU has been added to the scheduler's runqueue structures. This might potentially cause the unparked kthread to run on the wrong CPU, since the correct CPU isn't fully set up yet. That causes a sporadic, hard to debug boot crash triggering on some systems, reported by Borislav Petkov, and bisected down to: 2a442c9c64 ("x86: Use common outgoing-CPU-notification code") This patch places smpboot_unpark_threads() in a CPU hotplug notifier with priority set so that these kthreads are unparked just after the CPU has been added to the runqueues. Reported-and-tested-by: Borislav Petkov <bp@suse.de> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: Owen Hofmann <osh@google.com> Signed-off-by: Luis Henriques <luis.henriques@canonical.com>		History 2016-03-30 12:02:54 +01:00
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calibrate.c	kernel: delete __cpuinit usage from all core kernel files	2013-07-14 19:36:59 -04:00
do_mounts.c	init/do_mounts.c: fix comment error	2014-04-03 16:21:16 -07:00
do_mounts.h	md: move lots of #include lines out of .h files and into .c	2009-03-31 14:33:13 +11:00
do_mounts_initrd.c	usermodehelper: split remaining calls to call_usermodehelper_fns()	2013-04-30 17:04:06 -07:00
do_mounts_md.c	init: disable sparse checking of the mount.o source files	2012-05-31 17:49:27 -07:00
do_mounts_rd.c	cramfs: take headers to fs/cramfs	2014-01-25 03:13:02 -05:00
init_task.c	sched/rt: Move rt specific bits into new header file	2013-02-07 20:51:08 +01:00
initramfs.c	initramfs: debug detected compression method	2014-04-07 16:36:11 -07:00
Kconfig	init/Kconfig: Hide printk log config if CONFIG_PRINTK=n	2014-11-05 13:55:02 +00:00
main.c	cpu: Defer smpboot kthread unparking until CPU known to scheduler	2016-03-30 12:02:54 +01:00
Makefile	init_task: Replace CONFIG_HAVE_GENERIC_INIT_TASK	2012-05-05 13:00:46 +02:00
noinitramfs.c	init: mark __user address space on string literals	2010-10-26 16:52:15 -07:00
version.c	proc: Split the namespace stuff out into linux/proc_ns.h	2013-05-01 17:29:39 -04:00