Re: [PATCH] livepatch: klp_send_signal should treat PF_IO_WORKER like PF_KTHREAD
From: Jens Axboe
Date: Thu Mar 25 2021 - 12:31:37 EST
On 3/25/21 3:30 AM, Miroslav Benes wrote:
>> (PF_KTHREAD | PF_IO_WORKER) is open coded in soo many places maybe this is a
>> silly question, but...
>>
>> If the livepatch code could use fake_signal_wake_up(), we could consolidate
>> the pattern in klp_send_signals() with the one in freeze_task(). Then there
>> would only one place for wake up / fake signal logic.
>>
>> I don't fully understand the differences in the freeze_task() version, so I
>> only pose this as a question and not v2 request.
>
> The plan was to remove our live patching fake signal completely and use
> the new infrastructure Jens proposed in the past.
That would be great, I've actually been waiting for that to show up!
I would greatly prefer this approach if you deem it suitable for 5.12,
if not we'll still need the temporary work-around for live patching.
--
Jens Axboe