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Date:   Thu, 19 May 2022 23:30:02 -0700
From:   Eric Biggers <>
To:     "Darrick J. Wong" <>
        Keith Busch <>
Subject: Re: [RFC PATCH v2 1/7] statx: add I/O alignment information

On Thu, May 19, 2022 at 04:06:05PM -0700, Darrick J. Wong wrote:
> I guess that means for XFS it's effectively max(pagesize, i_blocksize,
> bdev io_opt, sb_width, and (pretend XFS can reflink the realtime volume)
> the rt extent size)?  I didn't see a manpage update for statx(2) but
> that's mostly what I'm interested in. :)

I'll send out a man page update with the next version.  I don't think there will
be much new information that isn't already included in this patchset, though.

> Looking ahead, it looks like the ext4/f2fs implementations only seem to
> be returning max(i_blocksize, bdev io_opt)?  But not the pagesize?

I think that's just an oversight.  ext4 and f2fs should round the value up to

- Eric

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