Re: [PATCH v2] zram: easy the allocation of zcomp_strm's buffers through vmalloc

[Sergey Senozhatsky]

On (24/02/07 12:14), Sergey Senozhatsky wrote:
> ---
> 
> zram: do not allocate physically contiguous strm buffers
> 
> Currently zram allocates 2 physically contigous pages per-CPU's
> compression stream (we may have up to 3 streams per-CPU). Since

Correction:
								^ up to 4

> those buffers are per-CPU we allocate them from CPU hotplug path,
> which may have higher risks of failed allocations on devices with
> fragmented memory.
> 
> Switch to virtually contiguos allocations - crypto comp does not
> seem impose requirements on compression working buffers to be
> physically contiguous.