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From: Andreas Dilger <adilger@turbolabs.com>
To: Steve Lord <lord@sgi.com>
Cc: hch@sgi.com, Alan Cox <alan@lxorguk.ukuu.org.uk>,
	"Gonyou, Austin" <austin@coremetrics.com>,
	narancs@narancs.tii.matav.hu, linux-xfs@oss.sgi.com,
	linux-kernel@vger.kernel.org
Subject: Re: XFS to main kernel source
Date: Thu, 20 Sep 2001 21:12:21 -0600	[thread overview]
Message-ID: <20010920211221.G14526@turbolinux.com> (raw)
In-Reply-To: <hch@ns.caldera.de> <20010920222643.A7267@caldera.de> <200109202131.f8KLVbB19795@jen.americas.sgi.com>
In-Reply-To: <200109202131.f8KLVbB19795@jen.americas.sgi.com>

On Sep 20, 2001  16:31 -0500, Steve Lord wrote:
> XFS quotas are transactional, when space is added to a file the quota is
> adjusted in the same transaction. It is fairly hard to do this without your
> own quota code.

Actually not.  The quotas in ext3 are transactional as well.  It's just
that the "ext3" journal layer allows nested transactions, so it is possible
to start a write transaction, call into the journal code which calls back
into the ext3 write code to start a nested transaction on the journal file
(i.e. it is in the same transaction as the initial write), and then the
initial write completes.

Cheers, Andreas
--
Andreas Dilger  \ "If a man ate a pound of pasta and a pound of antipasto,
                 \  would they cancel out, leaving him still hungry?"
http://www-mddsp.enel.ucalgary.ca/People/adilger/               -- Dogbert


  reply	other threads:[~2001-09-21  3:13 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-09-20 20:07 XFS to main kernel source Gonyou, Austin
2001-09-20 20:14 ` Alan Cox
2001-09-20 20:16   ` Steve Lord
2001-09-20 20:25     ` Alan Cox
2001-09-20 20:26     ` Christoph Hellwig
2001-09-20 21:31       ` Steve Lord
2001-09-21  3:12         ` Andreas Dilger [this message]
2001-09-21  3:25           ` Steve Lord
2001-09-21  4:42             ` Nathan Scott
2001-09-21  5:58         ` Christoph Hellwig
2001-09-21  8:40           ` Narancs v1
2001-09-21 14:19         ` Alexander Viro
2001-09-21 14:45           ` Steve Lord
2001-09-20 20:40     ` Alexander Viro
2001-09-21 18:03       ` Steve Lord
2001-09-20 20:29 ` Horst von Brand
2001-09-20 20:50   ` Alan Cox
  -- strict thread matches above, loose matches on Subject: below --
2001-11-21 23:32 [PATCH] Remove needless BKL from release functions David C. Hansen
2001-11-22 10:12 ` Oliver Neukum
2001-11-22 12:11   ` Christoph Hellwig
2001-11-22 12:30     ` Horst von Brand
2001-11-22 13:05       ` Christoph Hellwig
2001-11-23  9:44       ` Rick Lindsley
2001-11-23 10:10         ` Oliver.Neukum
2001-11-23 10:47           ` Christoph Hellwig
2001-11-23 11:24             ` Oliver Neukum
2001-11-26 17:46             ` David C. Hansen
2001-11-26 19:41               ` Flavio Stanchina
2001-11-26 19:53                 ` David C. Hansen
2001-11-23 12:08           ` Rick Lindsley
     [not found] <adilger@turbolabs.com>
2001-11-06 20:04 ` [PATCH] lp.c, eexpress.c jiffies cleanup Tim Schmielau
2001-11-06 21:15   ` Andreas Dilger
2001-11-06 21:37     ` Philip Blundell
2001-11-07  0:10       ` Andreas Dilger
2001-11-06 23:58         ` Tim Hockin
2001-09-20 18:12 XFS to main kernel source Narancs v1
2001-09-20 20:02 ` Alan Cox

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