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Date:      Thu, 22 Jun 2000 09:30:15 +0100
From:      Brian Somers <brian@Awfulhak.org>
To:        Anders Andersson <anders@sanyusan.se>
Cc:        Akinori -Aki- MUSHA <knu@idaemons.org>, andrews@technologist.com, mckusick@FreeBSD.org, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org, brian@hak.lan.Awfulhak.org
Subject:   Re: cvs commit: src/sys/contrib/softupdates softdep.h ffs_softdep.c 
Message-ID:  <200006220830.JAA01428@hak.lan.Awfulhak.org>
In-Reply-To: Message from Anders Andersson <anders@sanyusan.se>  of "Thu, 22 Jun 2000 08:05:09 %2B0200." <20000622080509.A4065@enterprise.sanyusan.se> 

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> on Tor, Jun 22, 2000 at 01:46:34pm +0900, Akinori -Aki- MUSHA wrote:
> > 
> > Yes, it has been working quite stably here too.  Besides, one must do
> > a "tunefs -n enable" for every partition that he or she wants to do
> > softupdates anyway, so just adding the support for softupdates to the
> > GENERIC kernel won't hurt anyone who don't want to turn that feature
> > on by default, except a little code increase.
> 
> Please take a look at what NetBSD just recently did:
> http://www.netbsd.org/Changes/#softdepsmount
> 
> These changes disables the whole 'tunefs' process, and let you control
> softupdates state with mount, (-o softdep). So all you have to do is to
> tune your /etc/fstab to enable softupdates. I think this will make it
> more easy to enable SOFTUPDATES by default.

I sent a followup message to that commit asking if it was likely to 
disturb any ongoing work with backgrounding fsck for softupdate 
filesystems.  It was not clear from the commit message if the 
superblock is still being updated:

brian@Awfulhak.org said:
> > Module Name:	basesrc
> > Committed By:	fvdl
> > Date:		Thu Jun 15 22:37:18 UTC 2000
> > 
> > Modified Files:
> > 	basesrc/sbin/tunefs: tunefs.8 tunefs.c
> > 
> > Log Message:
> > Disable (unifdef for now) tunefs -n <disable|enable>, this is done via
> > a mount option now.
> > 
> Does this not conflict with Kirks future plans to make fsck
> softupdates-aware (to fix bitmaps in the background) ?
> 
> --
> Brian <brian@Awfulhak.org>                        <brian@[uk.]FreeBSD.org>
>       <http://www.Awfulhak.org>;                   <brian@[uk.]OpenBSD.org>
> Don't _EVER_ lose your sense of humour ! 

I was underwhelmed by the response :-/

> -- 
> Anders Andersson		anders@sanyusan.se
> Sanyusan International AB	http://www.sanyusan.se/

-- 
Brian <brian@Awfulhak.org>                        <brian@[uk.]FreeBSD.org>
      <http://www.Awfulhak.org>;                   <brian@[uk.]OpenBSD.org>
Don't _EVER_ lose your sense of humour !




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