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Date:      Fri, 18 Oct 2002 03:44:06 -0500
From:      Gerd Knops <gerti@bitart.com>
To:        "Feisal Umar" <afu-subscribed-list@aeefyu.net>
Cc:        stable@freebsd.org
Subject:   Re: Random Crashes in 4.7 when transferring large files
Message-ID:  <C343701E-E275-11D6-A32B-00039363AEBE@bitart.com>
In-Reply-To: <20021018071132.0AEB419311@mailhub.webcraft99.com>

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I have seen this (currently running 4.6-RC) with heavy NFS traffic, but 
so random and rare that I wasn't able yet to have a closer look.

Gerd

On Friday, Oct 18, 2002, at 02:11 US/Central, Feisal Umar wrote:

> I am frequently encountering crashes on my 4.7 workstation. The common 
> denominator seems to be when I am transferring/copying large size of 
> files over to the network ( at one time I was "scp"ing a mysql 4.0 
> binary i.e. > 6MB file, over to a host in my network). There dont seem 
> to be any difference wether the operations are done via ssh/scp/smb, 
> which suggests to me that the problem may not be on an application 
> level.
> Has anyone encountered the same? I have 5 production machines which I 
> want to upgrade to 4.7, but this problem/unknown is holding me back.
> Following is the log from /var/log/messages :
> Oct 18 14:31:40 krista /kernel: Fatal trap 12: page fault while in 
> kernel mode
> Oct 18 14:31:40 krista /kernel: fault virtual address   = 0x3a
> Oct 18 14:31:40 krista /kernel: fault code              = supervisor 
> write, page not present
> Oct 18 14:31:40 krista /kernel: instruction pointer     = 
> 0x8:0xc02344f4
> Oct 18 14:31:40 krista /kernel: stack pointer           = 
> 0x10:0xe87dadc8
> Oct 18 14:31:40 krista /kernel: frame pointer           = 
> 0x10:0xe87dae68
> Oct 18 14:31:40 krista /kernel: code segment            = base 0x0, 
> limit 0xfffff, type 0x1b
> Oct 18 14:31:40 krista /kernel: = DPL 0, pres 1, def32 1, gran 1
> Oct 18 14:31:40 krista /kernel: processor eflags        = interrupt 
> enabled, resume, IOPL = 0
> Oct 18 14:31:40 krista /kernel: current process         = 352 
> (setiathome)
> Oct 18 14:31:40 krista /kernel: interrupt mask          = net
> Oct 18 14:31:40 krista /kernel: trap number             = 12
> Oct 18 14:31:40 krista /kernel: panic: page fault
> Oct 18 14:31:40 krista /kernel:
> Oct 18 14:31:40 krista /kernel: syncing disks... 5
> -------
> Feisal Umar
> http://www.webcraftsolutions.com
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