linux-kernel - Re: [PATCH] Add quick erase format option

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Message-ID: <1283084424.2131.40.camel@brekeke>
Date:	Sun, 29 Aug 2010 15:20:24 +0300
From:	Artem Bityutskiy <dedekind1@...il.com>
To:	Stefani Seibold <stefani@...bold.net>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	Artem Bityutskiy <Artem.Bityutskiy@...ia.com>,
	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	"Enzinger, Robert (EXT-Other - DE/Munich)" 
	<robert.enzinger.ext@....com>
Subject: Re: [PATCH] Add quick erase format option

On Sun, 2010-08-29 at 14:30 +0300, Artem Bityutskiy wrote:
> The reason why this flushing is needed is that we want to make sure
> that
> there are no PEBs which belonged to a volume with the same ID. Indeed,
> imaging you have volume 5 with many used LEBs. Then you remove this
> volume, so that all its LEBs are scheduled for erasure. Then you
> create
> a new volume with the same ID = 5. If we do not flush the queue, we
> may
> end up with rubbish from the older volume 5 in the new one. 

Err, it is important to say that we'll end up with the rubbish if we
have an unclean reboot after the new volume with ID 5 is created, but
before all PEBs belonging to the old volume with ID 5 are erased.
Hopefully, my explanation is not too messy :-)

-- 
Best Regards,
Artem Bityutskiy (Битюцкий Артём)

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