From: Matthew Wilcox <matthew@wil.cx>
To: Nick Piggin <npiggin@suse.de>
Cc: Richard Kojedzinszky <krichy@tvnetwork.hu>,
linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: minix/ext2 + rd problem
Date: Wed, 15 Oct 2008 13:22:54 -0600 [thread overview]
Message-ID: <20081015192254.GL15064@parisc-linux.org> (raw)
In-Reply-To: <20081015143425.GA2316@wotan.suse.de>
On Wed, Oct 15, 2008 at 04:34:25PM +0200, Nick Piggin wrote:
> You can flush and invalidate the blockdev with the --flushbufs argument
> to blockdev command. However you can't use this with ramdisk devices:
> someone thought it would be a good idea to save on precious ioctl space
> and implemented totally different semantics on that device with the
> same ioctl (it throws away the underlying data as well as the cache).
What happens if we declare that a bug and fix it (and add a new ioctl to
actually throw away the data ... oh, wait, we have one, it's BLKDISCARD)?
--
Matthew Wilcox Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours. We can't possibly take such
a retrograde step."
next prev parent reply other threads:[~2008-10-15 19:22 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-14 14:43 minix/ext2 + rd problem Richard Kojedzinszky
2008-10-15 4:16 ` Nick Piggin
2008-10-15 8:19 ` Richard Kojedzinszky
2008-10-15 14:05 ` Nick Piggin
2008-10-15 14:10 ` Richard Kojedzinszky
2008-10-15 14:34 ` Nick Piggin
2008-10-15 19:22 ` Matthew Wilcox [this message]
2008-10-16 3:48 ` Nick Piggin
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