Hi, Minchan, On Thu, 19 Nov 2020 at 22:26, Minchan Kim <minchan@xxxxxxxxxx> wrote: > > What's the purpose of ZRAM_AUTOSEL_ALGO? > If you and Sergey already discussed, sorry about the missing it. The purpose of ZRAM_AUTOSEL_ALGO is to make sure at least one of the required compression algorithms is enabled, either as a module or built-in. I believe Sergey agreed with the reasoning behind it, but he'll let us know if I misunderstood. :) > Below doesn't work for your goal? Unfortunately, it doesn't. :( It breaks the dependency chain, allowing you to deselect all compression algorithms in the crypto menu, and consequently disabling zram. This is only my opinion (and I know select directives should be very well justified), but I believe that it should be zram to make sure its required libraries are enabled, and not the other way around. Having to select a compression algorithm in the crypto menu for the zram block device to appear in the block devices menu seems backwards to me. Thanks, Rui