Re: [PATCH 1/2] bcache: ignore pending signals in bcache_device_init()

Сорокин Артем Сергеевич
2020-03-03T07:05:15Z

Hello Coly,

On 2 Mar 2020, at 20:06, Coly Li <colyli@suse.de> wrote:
>
> I see your concern. But the udev timeout is global for all udev rules, I
> am not sure whether change it to a very long time is good ... (indeed I
> tried to add event_timeout=3600 but I can still see the signal received).
>
> Ignore the pending signal in bcache registering code is the only method
> currently I know to avoid bcache auto-register failure in boot time. If
> there is other way I can achieve the same goal, I'd like to try.
>
> BTW, by the mean time, I am still looking for the reason why
> event_timeout=3600 in /etc/udev/udev.conf does not take effect...

In my setup, i completely moved bcache registration from udev to systemd. As a result, there is no need to change udev timeout or worry about kill signals. But this approach breaks hot-plugging bcache devices and require to modify udev rules and probe-bcache from bcache-tools.

It also helps me to manage startup dependencies to ensure that ceph-osd will start only when bcache is ready.

I can elaborate on my approach if you are interested.

--
Artem Sorokin