[PATCH 5/5] nvme: enable logical block size > PAGE_SIZE

[Luis Chamberlain]

On Sun, May 12, 2024 at 12:30:40AM +0100, Matthew Wilcox wrote:
> On Sat, May 11, 2024 at 04:09:48PM -0700, Luis Chamberlain wrote:
> > We can't just do this, we need to consider the actual nvme cap (test it,
> > and if it crashes and below what the page cache supports, then we have
> > to go below) and so to make the enablment easier. So we could just move
> > this to helper [0]. Then when the bdev cache patch goes through the
> > check for CONFIG_BUFFER_HEAD can be removed, if this goes first.
> > 
> > We crash if we go above 1 MiB today, we should be able to go up to 2
> > MiB but that requires some review to see what stupid thing is getting
> > in the way.
> > 
> > [0] https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux.git/commit/?h=20240408-lbs-scsi-kludge&id=1f7f4dce548cc11872e977939a872b107c68ad53
> 
> This is overengineered garbage.  What's the crash?

I had only tested it with iomap, I had not tested it with buffer-heads,
and so it would require re-testing. It's Saturday 5pm, I should be doing
something else other than being on my computer.

  Luis