Message-ID: <1060059844.3f2f3ac46e2f2@kolivas.org>
Date: Tue,  5 Aug 2003 15:04:04 +1000
From: Con Kolivas <kernel@kolivas.org>
To: Nick Piggin <piggin@cyberone.com.au>
Cc: linux kernel mailing list <linux-kernel@vger.kernel.org>,
       Andrew Morton <akpm@osdl.org>, Ingo Molnar <mingo@elte.hu>,
       Felipe Alfaro Solana <felipe_alfaro@linuxmail.org>
Subject: Re: [PATCH] O13int for interactivity
References: <200308050207.18096.kernel@kolivas.org> <200308051220.04779.kernel@kolivas.org> <3F2F149F.1020201@cyberone.com.au> <200308051318.47464.kernel@kolivas.org> <3F2F2517.7080507@cyberone.com.au>
In-Reply-To: <3F2F2517.7080507@cyberone.com.au>
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Quoting Nick Piggin <piggin@cyberone.com.au>:

> 
> 
> Con Kolivas wrote:
> 
> >On Tue, 5 Aug 2003 12:21, Nick Piggin wrote:
> >
> >>No, this still special-cases the uninterruptible sleep. Why is this
> >>needed? What is being worked around? There is probably a way to
> >>attack the cause of the problem.
> >>
> >
> >Footnote: I was thinking of using this to also _elevate_ the dynamic
> priority 
> >of tasks waking from interruptible sleep as well which may help throughput.
> >
> 
> Con, an uninterruptible sleep is one which is not be woken by a signal,
> an interruptible sleep is one which is. There is no other connotation.
> What happens when read/write syscalls are changed to be interruptible?
> I'm not saying this will happen... but come to think of it, NFS probably
> has interruptible read/write.
> 
> In short: make the same policy for an interruptible and an uninterruptible
> sleep.

That's the policy that has always existed...

Interesting that I have only seen the desired effect and haven't noticed any 
side effect from this change so far. I'll keep experimenting as much as 
possible (as if I wasn't going to) and see what the testers find as well.

Con
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