From owner-freebsd-hackers  Sun Oct  5 21:27:42 1997
Return-Path: <owner-freebsd-hackers>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.7/8.8.7) id VAA01727
          for hackers-outgoing; Sun, 5 Oct 1997 21:27:42 -0700 (PDT)
          (envelope-from owner-freebsd-hackers)
Received: from rover.village.org (rover.village.org [204.144.255.49])
          by hub.freebsd.org (8.8.7/8.8.7) with SMTP id VAA01719;
          Sun, 5 Oct 1997 21:27:33 -0700 (PDT)
          (envelope-from imp@village.org)
Received: from harmony [10.0.0.6] 
	by rover.village.org with esmtp (Exim 1.71 #1)
	id 0xI4lX-0002ef-00; Sun, 5 Oct 1997 22:27:31 -0600
Received: from harmony.village.org (localhost [127.0.0.1]) by harmony.village.org (8.8.7/8.8.3) with ESMTP id WAA11488; Sun, 5 Oct 1997 22:28:59 -0600 (MDT)
Message-Id: <199710060428.WAA11488@harmony.village.org>
To: Tom <tom@sdf.com>
Subject: Re: mount async and possible loss of F/S 
Cc: Drew Derbyshire <ahd@freebsd.org>, hackers@hub.freebsd.org
In-reply-to: Your message of "Sun, 05 Oct 1997 20:59:43 PDT."
		<Pine.BSF.3.95q.971005205611.20232B-100000@misery.sdf.com> 
References: <Pine.BSF.3.95q.971005205611.20232B-100000@misery.sdf.com>  
Date: Sun, 05 Oct 1997 22:28:58 -0600
From: Warner Losh <imp@village.org>
Sender: owner-freebsd-hackers@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

In message <Pine.BSF.3.95q.971005205611.20232B-100000@misery.sdf.com> Tom writes:
:   Try it out.  Mount /usr/src and /usr/obj async, start a make world, and
: hit the power switch.  Compare the damage to a non-async set.

Might be better to mount /usr/obj async only, since it can always be
brought to a known state w/o loss of data with newfs.  /usr/src can be
much harder to do that with if you have local mods...

Also, mounting /usr/src async doesn't seem to buy much in the make
world stone.  It does help to mount /usr/src noatime, however.

Warner