Re: [PATCH 1/15] EDAC: switch to kthread_ API

[Andrew Morton <akpm@osdl.org>]

Dave Peterson <dsp@llnl.gov> wrote:
>
> On Friday 03 March 2006 07:57, Doug Thompson wrote:
> > Currently the timer event code performs two operations:
> >
> >   1) ECC polling and
> >   2) PCI parity polling.
> >
> > I want to split those from each other, so each can have a seperate cycle
> > rate (also adding a sysfs cycle control for the PCI parity timing in
> > addition to the existing ECC cycle control).
> 
> Yes, this sounds like a good idea.  Using schedule_delayed_work() to
> independently implement each polling cycle, we should be able to get
> rid of the EDAC kernel thread.

That would suit.  One needs to be quite careful about killing everything
off in the close->rmmod side of things, especially if the delayed work
handler re-arms itself.  We have a pending (and possibly executing) timer
handler to worry about, then a pending (and possibly executing) keventd
handler to worry about.

We've got this cancel_rearming_delayed_work() thing - I was never terribly
happy about it, but I think it works.

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