Re: [PATCH v3 10/11] zram: use rw_semaphore for decompression streams

[Sergey Senozhatsky]

On (26/10/15 11:19), Bo Zhang wrote:
> I'll also apply Sergey's vm_map_ram() patch (with the memalloc_noio
> fixup) and re-run on-device. Note this only helps the cross-page part
> of our exclusive reads on a stateless backend like lzo-rle; it won't
> change zstd/deflate, which stay exclusive regardless because of
> create_dctx. Will report the numbers separately.

Thanks.  I just sent another patch.  vm_map_ram() is a little of a
hard sell, I guess, because of TLBs.  kmalloc() patch doesn't seem
to be much worse (if worse at all).