Re: pdflush -> noflushd related question

[Andrew Morton <akpm@digeo.com>]

Michael Buesch <fsdeveloper@yahoo.de> wrote:
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> On Saturday 31 May 2003 19:58, Andrew Morton wrote:
> > You can turn these guys off by setting the sysctls to 1000000000
> > I guess.   Problem is, I don't think there's a way of starting them
> > again until the ten million seconds expires.  hmm.
> 
> I've thought a little bit more about it.
> Why do you think, there is no way of waking up?
> Is it, because, when I set it to 1000000000 and the back to,
> let's say, 500, the pdflush threads don't wake up to recognize
> this change? Is this the cause?

Yes.

> What about signaling all pdflush threads with, for example,
> for(ALL_PDFLUSHS)
> 	kill(pid, SIGSTOP);
> 
> Don't they wake up then and recognize the reducing of the timeout?
> The old noflushd did so to wake up updated.

No, that's OK - I'll fix it in the kernel.  It's pretty simple.