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(parent: d314f3b) | patch
workqueue: avoid hard lockups in show_workqueue_state()
authorSergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Thu, 11 Jan 2018 00:53:35 +0000 (09:53 +0900)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 23 Jan 2018 18:57:08 +0000 (19:57 +0100)
commitca2d736867200b931ca61383af2fd68bb5fd2ecb
tree6775ae7c626a5a426878b1233e6218eb6a1cce07tree | snapshot
parentd314f3bc7f3d0853e38364c95b1d30fb4e33e989commit | diff
workqueue: avoid hard lockups in show_workqueue_state()

commit 62635ea8c18f0f62df4cc58379e4f1d33afd5801 upstream.

show_workqueue_state() can print out a lot of messages while being in
atomic context, e.g. sysrq-t -> show_workqueue_state(). If the console
device is slow it may end up triggering NMI hard lockup watchdog.

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
kernel/workqueue.c diff | blob | history