Re: [RFC PATCH] mm: skip GFP_IO if swap is zram only

[Christoph Hellwig]

On Mon, Oct 10, 2022 at 07:00:22PM +0800, zhaoyang.huang wrote:
> From: Zhaoyang Huang <zhaoyang.huang@xxxxxxxxxx>
> 
> __GFP_IO is believed to prevent the allocation being suspended due to accessing
> physical block devices when reclaiming dirty pages. Zram is not considered as
> such kind of device from kernel perspective of view. Do swap things if the system
> is zram only.

No, zram is not in any way special, and for sure not important enough
to add special case hacks to the VM code.