On Mon, Feb 26, 2024 at 10:49:34AM +0100, Pankaj Raghav (Samsung) wrote:
> From: Dave Chinner <[email protected]>
>
> For block size larger than page size, the unit of efficient IO is
> the block size, not the page size. Leaving stat() to report
> PAGE_SIZE as the block size causes test programs like fsx to issue
> illegal ranges for operations that require block size alignment
> (e.g. fallocate() insert range). Hence update the preferred IO size
> to reflect the block size in this case.
>
> Signed-off-by: Dave Chinner <[email protected]>
> dd2d535e3fb29d ("xfs: cleanup calculating the stat optimal I/O size")]
> Signed-off-by: Luis Chamberlain <[email protected]>
Something screwed up there, and you haven't put your own SOB on
this.
> ---
> fs/xfs/xfs_iops.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
> index a0d77f5f512e..1b4edfad464f 100644
> --- a/fs/xfs/xfs_iops.c
> +++ b/fs/xfs/xfs_iops.c
> @@ -543,7 +543,7 @@ xfs_stat_blksize(
> return 1U << mp->m_allocsize_log;
> }
>
> - return PAGE_SIZE;
> + return max_t(unsigned long, PAGE_SIZE, mp->m_sb.sb_blocksize);
> }
This function returns a uint32_t, same type as
mp->m_sb.sb_blocksize. The comparision should use uint32_t casts,
not unsigned long.
ALso, this bears no resemblence to the original patch I wrote back in
2018. Please remove my SOB from it - you can state that "this change
is based on a patch originally from Dave Chinner" to credit the
history of it, but it's certainly not the patch I wrote 6 years ago
and so my SOB does not belong on it.
-Dave.
--
Dave Chinner
[email protected]