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Date:	Sun, 13 Mar 2011 21:37:44 -0400
From:	Theodore Tso <tytso@....EDU>
To:	"Indan Zupancic" <indan@....nu>
Cc:	"Jeff Garzik" <jeff@...zik.org>,
	"Ric Wheeler" <ricwheeler@...il.com>,
	"Arnd Bergmann" <arnd@...db.de>, "Sage Weil" <sage@...dream.net>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	"Aneesh Kumar K. V" <aneesh.kumar@...ux.vnet.ibm.com>,
	"Jonathan Nieder" <jrnieder@...il.com>, akpm@...ux-foundation.org,
	linux-api@...r.kernel.org, mtk.manpages@...il.com,
	viro@...iv.linux.org.uk, hch@....de, l@...per.es
Subject: Re: [PATCH v3] introduce sys_syncfs to sync a single file system


On Mar 13, 2011, at 9:31 PM, Indan Zupancic wrote:

> The new syscall works on only one fd too. The behaviour of the proposed
> syncfs and an extended sync_file_range is exactly the same.

No, it's quite different.   One syncs the entire file system; sync_file_range
requests that the pages associated with a file be pushed to disk --- it says
nothing about the metadata associated with the file.

I'm in favor of the new sys_syncfs system call.

-- Ted

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