https://lwn.net/Articles/1012215/
zsmalloc/zram: there be preemption [LWN.net]
there bezrampreemptionlwn
https://android.googlesource.com/kernel/prebuilts/common-modules/virtual-device/5.10/x86-64/+/1fba091f467be55150b54dddf2901c9d6fce7007/zsmalloc.ko
zsmalloc.ko - kernel/prebuilts/common-modules/virtual-device/5.10/x86-64 - Git at Google