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Date: Mon, 8 Sep 2014 20:19:12 -0700
From: "Luis R. Rodriguez" <mcgrof@...not-panic.com>
To: Tejun Heo <tj@...nel.org>
Cc: Lennart Poettering <lennart@...ttering.net>,
Kay Sievers <kay@...y.org>,
Dmitry Torokhov <dmitry.torokhov@...il.com>,
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Andrew Morton <akpm@...ux-foundation.org>,
Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
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Linux SCSI List <linux-scsi@...r.kernel.org>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [RFC v2 3/6] kthread: warn on kill signal if not OOM
On Mon, Sep 8, 2014 at 8:03 PM, Tejun Heo <tj@...nel.org> wrote:
> On Mon, Sep 08, 2014 at 07:57:28PM -0700, Luis R. Rodriguez wrote:
>> > I think we
>> > just should make exceptions sensible so that it works fine in practice
>> > for now (and I don't think that'd be too hard). So, the only
>> > cooperation necessary from userland would be just saying "I don't
>> > wanna wait for device probing on module load."
>>
>> But we're talking about drivers that have a flag that says 'you gotta
>> wait sucker', what do we want systemd to do then? I'd be happy if it'd
>> would not send the sigkill for these drivers, for example.
>
> Hah? Can you give me an example? I'm having hard time imagining a
> driver with such requirement given our current driver core
> implementation.
I didn't say I had one in mind, but if you're certain these *shouldn't
exist* that's sufficient by me as well.
OK so I'll respin this series to enable a sysctl that would enable
async probe for *all drivers* using queue_work(system_unbound_wq) and
only use sync probe for now on request_module() users, we'll address
scheduling issues as they come up. I'll be ignoring built-in.
On the systemd side of things it should enable this sysctl and for
older kernels what should it do?
Luis
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