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Date:      Sun, 5 May 2002 19:03:21 -0500 (CDT)
From:      Mike Silbersack <silby@silby.com>
To:        Patrick Thomas <root@utility.clubscholarship.com>
Cc:        freebsd-hackers@freebsd.org
Subject:   Re: what causes a userland to stop, but allows kernel to continue ?
Message-ID:  <20020505184056.J57177-100000@patrocles.silby.com>
In-Reply-To: <20020505162455.K86733-100000@utility.clubscholarship.com>

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On Sun, 5 May 2002, Patrick Thomas wrote:

> So, based on a previous thread, it looks like I have a server whose
> userland halted, essentially, but the kernel continued running.

My guess would be that userland apps are not necessarily stopped, but
perhaps a few processes are somehow locking out all others.

I think the best way to determine what is happening is for you to compile
DDB into your kernel, then break into during the next pseudo-lockup
incident to see if you can determine what is going on.

Mike "Silby" Silbersack


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