Re: kern/47231: crash or power loss during cvs update on WAPBL-enabled volume results in near-irreparable damage to CVS metadata.

[David Holland <dholland-bugs%netbsd.org@localhost>]

The following reply was made to PR kern/47231; it has been noted by GNATS.

From: David Holland <dholland-bugs%netbsd.org@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: kern/47231: crash or power loss during cvs update on
 WAPBL-enabled volume results in near-irreparable damage to CVS metadata.
Date: Wed, 28 Nov 2012 15:36:22 +0000

 On Wed, Nov 21, 2012 at 05:20:01PM +0000, jakllsch%kollasch.net@localhost 
wrote:
  > Crash or power loss during cvs update on WAPBL-enabled volume results in
  > near-irreparable damage to CVS working copy metadata.
 
 As discussed periodically elsewhere, this is a long-standing design
 bug in ffs (the original motivation for softupdates) which WAPBL fails
 to correct. Experience so far seems to indicate that the problem is
 more severe in practice with WAPBL, probably because it runs faster
 and more data is buffered and unwritten at crash time.
 
 That CVS is somewhat lame about its metadata handling isn't really
 relevant.
 
 As far as I can tell there isn't an existing PR about this issue,
 possibly because it's older than NetBSD, so I'm going to adjust the
 synopsis of this one to serve the general case.
 
 I'm also setting it to critical/high.
 
 -- 
 David A. Holland
 dholland%netbsd.org@localhost