[LTP] [PATCH v1] swapoff01.c: Adjust blocks size base on pagesize

[Cyril Hrubis]

Hi!
> The make_swapfile function will encounter no space error if pagesize
> is bigger then 4096, such as ppc64 system use default pagesize 65535.
                                                                    ^
								 65536?

Isn't this more about Btrfs though? Looking at the make_swapfile() we do
use statvfs to get filesystem block size and if that is Btrfs with 64k
blocks we end up with swapfile of a size of 4GB that sounds like a bit
too much I guess.

> Signed-off-by: Wei Gao <wegao@suse.com>
> ---
>  testcases/kernel/syscalls/swapoff/swapoff01.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/testcases/kernel/syscalls/swapoff/swapoff01.c b/testcases/kernel/syscalls/swapoff/swapoff01.c
> index c303588df..71d6c6c04 100644
> --- a/testcases/kernel/syscalls/swapoff/swapoff01.c
> +++ b/testcases/kernel/syscalls/swapoff/swapoff01.c
> @@ -44,7 +44,12 @@ static void setup(void)
>  {
>  	is_swap_supported(TEST_FILE);
>  
> -	if (make_swapfile(SWAP_FILE, 65536, 1))
> +	int blocks = 65535;
> +
> +	if (getpagesize() > 4096)
> +		blocks = 65535 * 4096 / getpagesize();
> +
> +	if (make_swapfile(SWAP_FILE, blocks, 1))
>  		tst_brk(TBROK, "Failed to create file for swap");


I do not think that this is a right solution though. Is there any reason
why we pass number of blocks to the make_swapfile instead of megabytes?

>  }
>  
> -- 
> 2.35.3
> 
> 
> -- 
> Mailing list info: https://lists.linux.it/listinfo/ltp

-- 
Cyril Hrubis
chrubis@suse.cz