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

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Message-ID: <CAFLxGvznA3m0vF=ygMsbqU0hVq7cpkDZWxCfqAQJKAutUhQj4w@mail.gmail.com>
Date:	Sun, 5 Apr 2015 21:49:27 +0200
From:	Richard Weinberger <richard.weinberger@...il.com>
To:	Pavel Machek <pavel@....cz>
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, 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.

-- 
Thanks,
//richard
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