diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2017-09-12 21:37:00 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-09-14 11:41:04 +0200 |
| commit | b7a349819d4b9b5db64e523351e66a79a758eaa5 (patch) | |
| tree | 92f64ad56f0be008103710de0f8911fc8548820b /README | |
| parent | 5490125d77a43016b26f629d4b485e2c62172551 (diff) | |
| download | linux-b7a349819d4b9b5db64e523351e66a79a758eaa5.tar.bz2 | |
watchdog/core: Rework CPU hotplug locking
The watchdog proc interface causes extensive recursive locking of the CPU
hotplug percpu rwsem, which is deadlock prone.
Replace the get/put_online_cpus() pairs with cpu_hotplug_disable()/enable()
calls for now. Later patches will remove that requirement completely.
Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Don Zickus <dzickus@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Ulrich Obergfell <uobergfe@redhat.com>
Link: http://lkml.kernel.org/r/20170912194146.568079057@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'README')
0 files changed, 0 insertions, 0 deletions