[LTP] [PATCH] zram/zram03.c: Fix obsolete zram status files

[Petr Vorel <pvorel@suse.cz>]

Hi Xiao,

> Since kernel commit c87d1655c295, separate zram status files("compr_data_size",
> "num_reads" etc.) which can be accessed via one of zram<id>/stat or
> zram<id>/io_stat or zram<id>/mm_stat were removed.

> This commit broke zram03, as below:
> ----------------------------------------------------------------------
> safe_file_ops.c:144: Failed to open FILE '/sys/block/zram0/compr_data_size'
> for reading at zram03.c:181: errno=ENOENT(2): No such file or directory
> ----------------------------------------------------------------------

> Also, zero pages in zram<id>/mm_stat was extended to same element pages
> since kernel commit 8e19d540d107.

> We try to get requested zram status by zram<id>/stat and zram<id>/mm_stat
> if separate zram status files don't exist.

> URL for detailed zram status:
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/blockdev/zram.txt
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/block/stat.txt

> Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
> ---

Thanks for your patch, merged!
I'm sorry to keep you waiting for review so long.


Kind regards,
Petr