Re: [PATCH] O6int for interactivity

From: Wiktor Wodecki <wodecki@gmx.de>
To: Mike Galbraith <efault@gmx.de>
Cc: Nick Piggin <piggin@cyberone.com.au>,
	Davide Libenzi <davidel@xmailserver.org>,
	Con Kolivas <kernel@kolivas.org>,
	linux kernel mailing list <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@osdl.org>,
	Felipe Alfaro Solana <felipe_alfaro@linuxmail.org>,
	Zwane Mwaikambo <zwane@arm.linux.org.uk>
Subject: Re: [PATCH] O6int for interactivity
Date: Fri, 18 Jul 2003 12:31:05 +0200	[thread overview]
Message-ID: <20030718103105.GE622@gmx.de> (raw)
In-Reply-To: <5.2.1.1.2.20030718120229.01a8fcf0@pop.gmx.net>

[-- Attachment #1: Type: text/plain, Size: 731 bytes --]

On Fri, Jul 18, 2003 at 12:18:33PM +0200, Mike Galbraith wrote:
> That _might_ (add salt) be priorities of kernel threads dropping too low.
> 
> I'm also seeing occasional total stalls under heavy I/O in the order of 
> 10-12 seconds (even the disk stops).  I have no idea if that's something in 
> mm or the scheduler changes though, as I've yet to do any isolation and/or 
> tinkering.  All I know at this point is that I haven't seen it in stock yet.

I've seen this too while doing a huge nfs transfer from a 2.6 machine to
a 2.4 machine (sparc32). Thought it'd be something with the nfs changes
which were recently, might be the scheduler, tho. Ah, and it is fully
reproducable.

-- 
Regards,

Wiktor Wodecki

[-- Attachment #2: Type: application/pgp-signature, Size: 189 bytes --]