From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeff Moyer <jmoyer@redhat.com>
Subject: Re: [PATCH v2] fs: Invalidate the cache for a parent block-device if fsync() is called for a partition
Date: Mon, 23 Jan 2012 11:27:02 -0500
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Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	"Bryn M. Reeves" <bmr@redhat.com>,
	Mikulas Patocka <mpatocka@redhat.com>
To: Niels de Vos <ndevos@redhat.com>
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In-Reply-To: <1327315109-7740-1-git-send-email-ndevos@redhat.com> (Niels de
	Vos's message of "Mon, 23 Jan 2012 10:38:29 +0000")
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Niels de Vos <ndevos@redhat.com> writes:

> Executing an fsync() on a file-descriptor of a partition flushes the
> caches for that partition by calling blkdev_issue_flush(). However, it
> seems that reading data through the parent device will still return the
> old cached data.

What problem, exactly, are you trying to fix?  Could you please post a
reproducer?

Cheers,
Jeff