linux-kernel - Re: Ctrl+C doesn't interrupt process waiting for I/O

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Message-ID: <486F543D.8010409@firstfloor.org>
Date:	Sat, 05 Jul 2008 13:00:13 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	Joe Peterson <joe@...rush.com>, Elias Oltmanns <eo@...ensachen.de>,
	Török Edwin <edwintorok@...il.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: Ctrl+C doesn't interrupt process waiting for I/O

Alan Cox wrote:
>> So what kind of data do you want? Someone watching a wallclock while
>> comparing Ctrl-Z+kill versus Ctrl-C on a IO intensive process?
> 
> Latency traces with timestamps might be quite useful, they'd probably
> also tell you why it happened.

Ok so you're asking someone else to debug it.

 I can't reproduce it, nobody has provided
> numbers so even if I wanted to work on it I couldn't do much.

Well we had a patch (although I haven't tried it yet)

http://marc.info/?l=linux-kernel&m=121489861508496&w=2

Is that not concrete enough?

> Instead I have lots of real tty, ATA and other work that needs doing
> which has quantified data,

All the reporters provided time stamp traces? @)

-Andi
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