Re: [RFC v2 3/6] kthread: warn on kill signal if not OOM

On Tue, Sep 9, 2014 at 4:03 PM, Tejun Heo [off-list ref] wrote:

On Tue, Sep 09, 2014 at 12:25:29PM +0900, Tejun Heo wrote:

quoted

Hello,

On Mon, Sep 08, 2014 at 08:19:12PM -0700, Luis R. Rodriguez wrote:

quoted

On the systemd side of things it should enable this sysctl and for
older kernels what should it do?

Supposing the change is backported via -stable, it can try to set the
sysctl on all kernels.  If the knob doesn't exist, the fix is not
there and nothing can be done about it.

The more I think about it, the more I think this should be a
per-insmod instance thing rather than a system-wide switch.

Agreed, a good use case that comes to mind would be systemd's
modules-load.d lists used by systemd services to require modules, the
hooks there however likely expect probe to complete as part of the
service, since the timeout is not applicable to these the synchronous
probe for them would be good while systemd would use async probe for
regular modules.

Currently
the kernel param code doesn't allow a generic param outside the ones
specified by the module itself but adding support for something like
driver.async_load=1 shouldn't be too difficult, applying that to
existing systems shouldn't be much more difficult than a system-wide
switch, and it'd be siginificantly cleaner than fiddling with driver
blacklist.

Agreed.

  Luis