Re: [PATCH v1] zram: add size class equals check into recompression

Andrew Morton
2022-10-24T22:50:49Z

On Mon, 24 Oct 2022 15:09:42 +0300 Alexey Romanov <avromanov@sberdevices.ru> wrote:

> It makes no sense for us to recompress the object if it will
> be in the same size class. We anyway don't get any memory gain.
> But, at the same time, we get a CPU time overhead when inserting
> this object into zspage and decompressing it afterwards.
>

Dumb question: is it ever possible for compression to result in an
increase in size?

> + class_size_next == class_size_prev ||

IOW, could this be >=?