Re: [PATCH] brd: detect zero writes for saving ram

[Akinobu Mita]

2015-02-08 0:03 GMT+09:00 Akinobu Mita <akinobu.mita@xxxxxxxxx>:
> This introduces a module parameter to detect zero writes and not to
> allocate memory.  Read requests for unallocated (unwritten) region
> end up by reading zero.  So this can save zeroed memory consumption
> with extra overhead for the detection.
>
> This feature is useful for testing filesystems and user programs to
> huge files without huge real storage.  So this change also extends
> the upper limit on the size of the RAM disk.

I have just noticed about zram and I'll check I can use it instead.
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