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Date:      Sun, 20 May 2001 10:21:32 +0930
From:      Greg Lehey <grog@lemis.com>
To:        David Xu <davidx@viasoft.com.cn>
Cc:        George Reid <greid@FreeBSD.org>, freebsd-bugs@FreeBSD.org
Subject:   Re: kern/26938: 4.3-stable is a broken kernel
Message-ID:  <20010520102132.F75919@wantadilla.lemis.com>
In-Reply-To: <012301c0d82c$41a3fa40$3601a8c0@xyf>; from davidx@viasoft.com.cn on Wed, May 09, 2001 at 10:03:21AM %2B0800
References:  <00f901c0d050$96db7620$cc01a8c0@xyf> <Pine.BSF.4.21.0104290313590.4798-100000@sobek.openirc.co.uk> <20010429122750.F52871@wantadilla.lemis.com> <012301c0d82c$41a3fa40$3601a8c0@xyf>

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On Wednesday,  9 May 2001 at 10:03:21 +0800, David Xu wrote:
> On  Sunday, April 29, 2001 10:57 AM, Greg Lehey <grog@lemis.com> wrote:
>> On Sunday, 29 April 2001 at  3:16:44 +0100, George Reid wrote:
>> [snip]
>> That doesn't make it correct to close the PR.  David is pointing to a
>> regression here: he says that the system can no longer recover from a
>> resource problem where it previously did.  That's serious enough to
>> take another look at.
>>
>> I did take another look.  I couldn't reproduce the problem.  I've been
>> running the test program for 5 minutes now, and I've collected about
>> 3,200 zombies.  Further forks fail because the proc table is full.
>> There!  I've stopped it with ^C.
>
> I have found that if I use GENERIC kernel config, I can not trigger
> this bug, my machine has 64M RAM, default maxusers value in GENERIC
> kernel config file is 32, this is fine, change it to 128 and
> recompile/install kernel, I can use fork bomb to crash kernel.  so
> this bug is RAM size and maxusers related.

Please reproduce it and show me a kernel backtrace with symbols, and
I'll take a look at it.

Greg
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