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To: Luigi Rizzo <luigi@labinfo.iet.unipi.it>
cc: swallace@ece.uci.edu, current@FreeBSD.ORG
Subject: Re: exec bug 
In-reply-to: Your message of "Sun, 26 Jan 1997 12:47:07 +0100."
             <199701261147.MAA27929@labinfo.iet.unipi.it> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Sun, 26 Jan 1997 04:39:11 -0800
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>> >I haven't heard anything about the exec but I reported last week
>> >when an executable fails to read the image from the media due to a
>> >read error.
>> >
>> >execve() maps the first page to memory and calls exec_aout_imgact()
>> >which then accesses this page and fails.  The system then gets
>> >a page fault while in kernel mode and dies.
>
>Given this description, would this also occur when trying to run
>a program from an nfs-mounted partition which at some point becomes
>unavailable ? If not (as I hope!) what is the difference ?

   In the case of NFS, the read should block indefinately. I'm not sure what
will happen if the NFS is mounted "soft", however.

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project