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

From: Richard Weinberger
Date: Sun Apr 05 2015 - 16:09:35 EST

Am 05.04.2015 um 22:04 schrieb Pavel Machek:
> On Sun 2015-04-05 21:49:27, Richard Weinberger wrote:
>> On Sun, Apr 5, 2015 at 9:31 PM, Pavel Machek <pavel@xxxxxx> wrote:
>>> On Thu 2015-03-26 23:59:50, david.oberhollenzer@xxxxxxxxxxxxx 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@xxxxxxxxxxxxx>
>>>> ---
>>>> 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?

Emulating all aspects of real hardware is almost impossible.

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