Re: PR/38141 CVS commit: src/sys

[Andrew Doran <ad%NetBSD.org@localhost>]

The following reply was made to PR kern/38141; it has been noted by GNATS.

From: Andrew Doran <ad%NetBSD.org@localhost>
To: YAMAMOTO Takashi <yamt%mwd.biglobe.ne.jp@localhost>
Cc: gnats-bugs%NetBSD.org@localhost
Subject: Re: PR/38141 CVS commit: src/sys
Date: Wed, 7 May 2008 02:21:24 +0100

 On Wed, May 07, 2008 at 09:36:37AM +0900, YAMAMOTO Takashi wrote:
 
 > >  One effect of this change: previously if an unmount failed, we would make 
 > > a
 > >  half hearted attempt to back out of it gracefully, but that was unlikely 
 > > to
 > >  work in a lot of cases. Now while an unmount that will be aborted is in
 > >  progress, new file operations within the mount will fail instead of being
 > >  delayed. That is unlikely to be a problem though, because if the admin
 > >  requests unmount of a file system then s(he) has made a decision to deny
 > >  access to the resource.
 > 
 > doesn't it break, say, amd(8)?
 
 It seems like it would be problematic for the idle mount stuff.  It might be
 possible to use VFS_ROOT() as a single point that can be safely gated. I'll
 investigate.
 
 Andrew