Date: Sun, 22 Apr 2007 18:28:21 +0200 From: Ivan Voras <ivoras@fer.hr> To: Pawel Jakub Dawidek <pjd@FreeBSD.org> Cc: freebsd-geom@FreeBSD.org Subject: Re: gjournal & async Message-ID: <462B8D25.3000303@fer.hr> In-Reply-To: <20070422162601.GD52622@garage.freebsd.pl> References: <f0eb3i$97s$2@sea.gmane.org> <20070422123852.GA52622@garage.freebsd.pl> <462B83D7.1010905@fer.hr> <20070422162601.GD52622@garage.freebsd.pl>
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[-- Attachment #1 --] Pawel Jakub Dawidek wrote: > On Sun, Apr 22, 2007 at 05:48:39PM +0200, Ivan Voras wrote: >> Pawel Jakub Dawidek wrote: >>> On Sun, Apr 22, 2007 at 02:43:29AM +0200, Ivan Voras wrote: >>>> How does gjournal guarantee corectness if UFS is mounted async? AFAIK >>>> the "async" handling of IO requests is done by the UFS, the writes are >>>> not rescheduled at the GEOM layer? >>> GJournal has some minimum knowledge about VFS. Before it does journal >>> switch, it synchronize and suspends file system. This way we can be sure >>> everything is on disk in a consistent state. >> Thanks. So, this (async support) could actually work with other file >> systems, like ext2 and msdos? > > Once gjournal is taught about them, yes. Then you're not interfacing in the VFS layer, you're hooking directly into UFS? [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFGK40lldnAQVacBcgRAk0+AKC8dl5aqeSqbaBRxtPQfUCv5X6zfwCfTARi VNVd/5ktJpUy/QdChEj69bA= =wPSp -----END PGP SIGNATURE-----
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