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From: David Woodhouse <dwmw2@infradead.org>
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To: Nicolas Pitre <nico@cam.org>
Cc: Vipin Malik <vipin.malik@daniel.com>,
    Xavier DEBREUIL <xde@inventel.fr>, linux-mtd@lists.infradead.org
Subject: Re: root jffs2 
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nico@cam.org said:
>  If a sector is empty, it is simply put in the queue for signature
> stamping. 

It's easier to erase it again than prove it's empty. Reading the whole 
thing ten times wasn't sufficient - an improperly erased bit could return a 
zero on the eleventh read, after the whole device was reading 0xFF on the ten 
previous reads.

The erases aren't done synchronously - they're done in the background. They 
shouldn't hold the mount up. I suspect the patch you committed will make it 
start failing Vipin's powerfail tests again.

--
dwmw2