linux-kernel - Re: [patch][rfc] rewrite ramdisk

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Message-ID: <20071016212853.GB1314@closure.lan>
Date:	Tue, 16 Oct 2007 17:28:53 -0400
From:	Theodore Tso <tytso@....edu>
To:	Nick Piggin <nickpiggin@...oo.com.au>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christian Borntraeger <borntraeger@...ibm.com>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Martin Schwidefsky <schwidefsky@...ibm.com>
Subject: Re: [patch][rfc] rewrite ramdisk

On Tue, Oct 16, 2007 at 05:47:12PM +1000, Nick Piggin wrote:
> +	/*
> +	 * ram device BLKFLSBUF has special semantics, we want to actually
> +	 * release and destroy the ramdisk data.
> +	 */

We won't be able to fix completely this for a while time, but the fact
that BLKFLSBUF has special semantics has always been a major wart.
Could we perhaps create a new ioctl, say RAMDISKDESTORY, and add a
deperecation printk for BLKFLSBUF when passed to the ramdisk?  I doubt
there are many tools that actually take advantage of this wierd aspect
of ramdisks, so hopefully it's something we could remove in a 18
months or so...

							- Ted
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