commit 15b2219facad ("kernel: freezer should treat PF_IO_WORKER like
PF_KTHREAD for freezing") is to fix the freezeing issue of IO threads
by making the freezer not send them fake signals.Here live patching consistency model call klp_send_signals to wake up all tasks by send fake signal to all non-kthread which only check the PF_KTHREAD flag, so it still send signal to io threads which may lead to freezeing issue of io threads. Here we take the same fix action by treating PF_IO_WORKERS as PF_KTHREAD within klp_send_signal function. Signed-off-by: Dong Kai <dongka...@huawei.com> --- note: the io threads freeze issue links: [1] https://lore.kernel.org/io-uring/yegnip43%2f6kfn...@kevinlocke.name/ [2] https://lore.kernel.org/io-uring/d7350ce7-17dc-75d7-611b-27ebf2cb5...@kernel.dk/ kernel/livepatch/transition.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/livepatch/transition.c b/kernel/livepatch/transition.c index f6310f848f34..0e1c35c8f4b4 100644 --- a/kernel/livepatch/transition.c +++ b/kernel/livepatch/transition.c @@ -358,7 +358,7 @@ static void klp_send_signals(void) * Meanwhile the task could migrate itself and the action * would be meaningless. It is not serious though. */ - if (task->flags & PF_KTHREAD) { + if (task->flags & (PF_KTHREAD | PF_IO_WORKER)) { /* * Wake up a kthread which sleeps interruptedly and * still has not been migrated. -- 2.17.1
