Re: [PATCH RFC 2/2] zram: support compression at the granularity of multi-pages

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On Thu, Apr 11, 2024 at 12:41 PM Sergey Senozhatsky
<senozhatsky@xxxxxxxxxxxx> wrote:
>
> On (24/03/28 10:48), Barry Song wrote:
> [..]
> > diff --git a/drivers/block/zram/zram_drv.h b/drivers/block/zram/zram_drv.h
> > index 37bf29f34d26..8481271b3ceb 100644
> > --- a/drivers/block/zram/zram_drv.h
> > +++ b/drivers/block/zram/zram_drv.h
> > @@ -38,7 +38,14 @@
> >   *
> >   * We use BUILD_BUG_ON() to make sure that zram pageflags don't overflow.
> >   */
> > +
> > +#ifdef CONFIG_ZRAM_MULTI_PAGES
> > +#define ZRAM_FLAG_SHIFT (CONT_PTE_SHIFT + 1)
>
> So this is ARM-only?

No, it seems that this aspect was overlooked during the patch cleanup process.
Currently, our reliance is solely on !HIGHMEM for the safe utilization of kmap
for multi-pages.
will fix it in v2.

Thanks
Barry





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