Re: [RESEND RFC] zram: Allow rw_page when page isn't written back.

[Sergey Senozhatsky]

On (22/09/08 08:50), Brian Geffon wrote:
[..]
> +++ b/drivers/block/zram/zram_drv.h
> @@ -50,6 +50,7 @@ enum zram_pageflags {
>  	ZRAM_UNDER_WB,	/* page is under writeback */
>  	ZRAM_HUGE,	/* Incompressible page */
>  	ZRAM_IDLE,	/* not accessed page since last idle marking */
> +	ZRAM_NO_WB,	/* Do not allow page to be written back */
>  
>  	__NR_ZRAM_PAGEFLAGS,
>  };

Unrelated but somehow related.

I wonder if it's time for us to introduce a dedicated, say u16,
flags member to struct zram_table_entry. Unless my calculations
are extremely wrong, we are about to run out of spare bits in
zram_table_entry::flags on 32-bit systems.