[PATCH 1/6] mtd: nandsim: convert pages_written[] to bitmap

[Akinobu Mita]

2013/8/3 Artem Bityutskiy <dedekind1 at gmail.com>:
> On Fri, 2013-08-02 at 17:38 +0300, Artem Bityutskiy wrote:
>> On Sun, 2013-07-28 at 11:21 +0900, Akinobu Mita wrote:
>> > nandsim.pages_written[] is the array of unsigned char which is indexed
>> > by the page number and used for identifying which pages have been written
>> > when cache_file is used.  Each entry holds 0 (not written) or 1 (written),
>> > so it can be converted to bitmap.  This reduces the allocation size of
>> > pages_written[] by 1/8.
>>
>> Did you test this patch-set, if yes, how?
>
> Note, I am asking because this is an ancient and probably poor piece of
> code, but quite important, so I am just trying to understand whether I
> should test your patches before applying, and if yes, how.

I tested this with mtd/tests modules and mounting a filesystem through
mtdblock.  I also tried cache_file module parameter to test patch 1/6
because nandsim.pages_written[] is only used when cache_file is used.
Also I tried second_id_byte module parameter to check both 8-bit and
16-bit bus width are working.