linux-ext4 - Re: [PATCH] exofs: simple fsync race fix

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Message-ID: <20101125115033.GA3643@amd>
Date:	Thu, 25 Nov 2010 22:50:33 +1100
From:	Nick Piggin <npiggin@...nel.dk>
To:	Boaz Harrosh <bharrosh@...asas.com>
Cc:	Nick Piggin <npiggin@...nel.dk>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-ext4@...r.kernel.org,
	Roman Zippel <zippel@...ux-m68k.org>,
	"Tigran A. Aivazian" <tigran@...azian.fsnet.co.uk>,
	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>,
	Dave Kleikamp <shaggy@...ux.vnet.ibm.com>,
	Bob Copeland <me@...copeland.com>,
	reiserfs-devel@...r.kernel.org,
	Christoph Hellwig <hch@...radead.org>,
	Evgeniy Dushistov <dushistov@...l.ru>, Jan Kara <jack@...e.cz>
Subject: Re: [PATCH] exofs: simple fsync race fix

This is fine, we'll get it merged before 2.6.37, just give a couple of
days for review, I haven't had much confirmation from other vfs people
about these problems.

Thanks,
Nick

On Thu, Nov 25, 2010 at 12:52:08PM +0200, Boaz Harrosh wrote:
> From: Nick Piggin <npiggin@...nel.dk>
> 
> It is incorrect to test inode dirty bits without participating in the inode
> writeback protocol. Inode writeback sets I_SYNC and clears I_DIRTY_?, then
> writes out the particular bits, then clears I_SYNC when it is done. BTW. it
> may not completely write all pages out, so I_DIRTY_PAGES would get set
> again.
> 
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