Re: [PATCH 3/3] zram: use common zpool interface

[Vitaly Wool]

On Mon, Oct 14, 2019 at 12:49 PM Sergey Senozhatsky
<sergey.senozhatsky.work@xxxxxxxxx> wrote:
>
> On (10/10/19 23:20), Vitaly Wool wrote:
> [..]
> >  static const char *default_compressor = "lzo-rle";
> >
> > +#define BACKEND_PAR_BUF_SIZE 32
> > +static char backend_par_buf[BACKEND_PAR_BUF_SIZE];
>
> We can have multiple zram devices (zram0 .. zramN), I guess it
> would make sense not to force all devices to use one particular
> allocator (e.g. see comp_algorithm_store()).
>
> If the motivation for the patch set is that zsmalloc does not
> perform equally well for various data access patterns, then the
> same is true for any other allocator. Thus, I think, we need to
> have a per-device 'allocator' knob.

We were thinking here in per-SoC terms basically, but this is a valid
point. Since zram has a well-established sysfs per-device
configuration interface, backend choice better be moved there. Agree?

~Vitaly