Re: [RFC 00/23] Enable block size > page size in XFS

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lOn Thu, Sep 21, 2023 at 04:03:56PM +1000, Dave Chinner wrote:
> So there's clearly something wrong here - it's likely that the
> filesystem IO alignment parameters pulled from the underlying block
> device (4k physical, 512 byte logical sector sizes) are improperly
> interpreted.  i.e. for a filesystem with a sector size of 4kB,
> direct IO with an alignment of 512 bytes should be rejected......

I wonder if it's something in the truncation code that's splitting folios
that ought not to be split.  Does this test possibly keep folios in
cache that maybe get invalidated?

truncate_inode_partial_folio() is the one i'm most concernd about.
but i'm also severely jetlagged.

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