From: Christoph Hellwig <hch@infradead.org>
To: Muli Ben-Yehuda <muli@il.ibm.com>
Cc: Yitzchak Eidus <ieidus@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: changing internal kernel system mechanism in runtime by a module patch
Date: Fri, 17 Nov 2006 06:58:29 +0000 [thread overview]
Message-ID: <20061117065828.GA25155@infradead.org> (raw)
In-Reply-To: <20061117064732.GC3735@rhun.zurich.ibm.com>
On Fri, Nov 17, 2006 at 08:47:32AM +0200, Muli Ben-Yehuda wrote:
> > i am talking about a clean/standard way to do such thing
> > (without overwrite the mem address of the function and replace it in a
> > dirty way...)
>
> k42 supports "dynamic hot-swap" and there's been some work done to
> bring it into Linux, see e.g.,
> http://ozlabs.org/pipermail/k42-discussion/2006-October/001615.html.
This kind of stuff is just sick. Better let them play with their research
OS for this kind of thing :) In practice any non-trivial bug fix requires
changes to global data structures so reloading a module doesn't make sense.
And for module-specific problems you should be able to hack around using
kprobes if you really need (but then again for a mission critical system
you should have proper active-active failover clustering anyway)
next prev parent reply other threads:[~2006-11-17 6:58 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-16 19:19 changing internal kernel system mechanism in runtime by a module patch Yitzchak Eidus
2006-11-16 19:29 ` Adrian Bunk
2006-11-16 21:49 ` Jan Engelhardt
2006-11-16 21:12 ` Stephen Hemminger
2006-11-17 6:47 ` Muli Ben-Yehuda
2006-11-17 6:58 ` Christoph Hellwig [this message]
2006-11-17 7:06 ` Muli Ben-Yehuda
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