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Date:      Wed, 30 Jun 2004 03:35:07 +0200
From:      Ronald Klop <ronald-freebsd7@klop.yi.org>
To:        Doug White <dwhite@gumbysoft.com>
Cc:        current@freebsd.org
Subject:   Re: panic: kmem_malloc; Should I increase some setting?
Message-ID:  <opsadv0teym97yfk@outgoing.local>
In-Reply-To: <20040629182027.I54069@carver.gumbysoft.com>
References:  <opsadr3evnm97yfk@outgoing.local> <20040629182027.I54069@carver.gumbysoft.com>

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On Tue, 29 Jun 2004 18:22:57 -0700 (PDT), Doug White  
<dwhite@gumbysoft.com> wrote:

> On Wed, 30 Jun 2004, Ronald Klop wrote:
>
>> I get the following panics while untarring a 30MB archive on an md  
>> device
>> create with:
>> tmpmfs="YES"
>> tmpsize="256m"
>
> This is a malloc-backed md disk, which consumes memory directly from KVM.
> If you do a large extraction it will consume all of KVM and cause your
> panic.  Unless you're running diskless and this is your only option
> besides NFS, either don't use tmpmfs or avoid extracting large amounts of
> data to /tmp.

Thanks, I read this a few moments ago in the manual page.
Isn't there a way to prevent or warn people when they create a malloc  
backed disk that is larger than KVM? I think a panic isn't very user  
friendly and it took me quite some time to figure this out.

Ronald.

-- 
  Ronald Klop
  Amsterdam, The Netherlands



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