linux-kernel - Re: [PATCH V2] UBI: power cut emulation for testing

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Message-ID: <20150405200459.GA1118@amd>
Date:	Sun, 5 Apr 2015 22:04:59 +0200
From:	Pavel Machek <pavel@....cz>
To:	Richard Weinberger <richard.weinberger@...il.com>
Cc:	david.oberhollenzer@...ma-star.at,
	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V2] UBI: power cut emulation for testing

On Sun 2015-04-05 21:49:27, Richard Weinberger wrote:
> On Sun, Apr 5, 2015 at 9:31 PM, Pavel Machek <pavel@....cz> wrote:
> > On Thu 2015-03-26 23:59:50, david.oberhollenzer@...ma-star.at wrote:
> >> Emulate random power cuts by switching device to ro after a number of
> >> writes to allow simple power cut testing with nand-sim.
> >>
> >> Maximum and minimum number of successful writes before power cut and
> >> what kind of writes (EC header, VID header or none) to interrupt
> >> configurable via debugfs.
> >>
> >> Signed-off-by: David Oberhollenzer <david.oberhollenzer@...ma-star.at>
> >> ---
> >> V2: Remove broken check to prevent multiple triggering
> >
> > Does NAND always finish write of full block during powerfail?
> 
> Not sure if I correctly understand your question.
> Unless you don't have special hardware a write can be interrupted and
> can cause problems.

But this only emulates fail after a full block written, no?
									Pavel

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