When i use zswap with /sys/module/zswap/parameters/zpool setted to z3fold system lockups when i open many tabs in chromium. With zbud all is OK.
NAME TYPE SIZE USED PRIO
/home/amachulin/my-data/swapfile file 8G 4G 50
System journal is clean, no error and warning messages.
Lockup happened in 90% cases. In other 10% lockup happens after exit from sleep.
Sorry for my English.
Created attachment 274087 [details]
I can't be sure I've seen the same problem you'd reported since you hadn't provided that much of a detail. However, I believe this patch is worth a try.
https://bugzilla.kernel.org/show_bug.cgi?id=201603 could be related or the cause may be the same.