linux-kernel - Re: -rt doesn't compile for UML

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Message-ID: <20071128125030.GB21791@elte.hu>
Date:	Wed, 28 Nov 2007 13:50:30 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Miklos Szeredi <miklos@...redi.hu>
Cc:	jdike@...toit.com, user-mode-linux-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: Re: -rt doesn't compile for UML


* Miklos Szeredi <miklos@...redi.hu> wrote:

> When writing a big file to a ubd disk, everything in uml slows down to
> a crawl, even though CPU usage is minimal.
> 
> So I wanted to try the latency tracer from -rt, but it doesn't compile 
> with UML:

note that there are standalone patches as well:

 http://people.redhat.com/mingo/latency-tracing-patches/

so there's no forced need to use -rt.

> Ingo, do you think this route is worthwhile pursuing, or is it too 
> difficult to make -rt work for UML?

-rt should work for UML as well - but it needs porting (as every 
architecture).

	Ingo
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