On (25/02/03 21:00), Yosry Ahmed wrote: > On Mon, Feb 03, 2025 at 12:49:42PM +0900, Sergey Senozhatsky wrote: > > On (25/02/01 17:21), Kairui Song wrote: > FWIW, I am not familiar at all with the zram code but zswap uses per-CPU > acomp contexts with a mutex instead of a spinlock. So the task uses the > context of the CPU that it started on, but it can be preempted or > migrated and end up running on a different CPU. Thank you for the idea. We couldn't do that before (in zram), in a number of cases per-CPU stream was taken from atomic context (under zram table entry spinlock/bit-spinlock), but it's possible now because entry lock is preemptible.
