On Mon, Apr 08, 2024 at 05:48:02PM +0800, Ming Lei wrote:
> The limit is from commit 09324d32d2a0 ("block: force an unlimited segment
> size on queues with a virt boundary") which claims to fix f6970f83ef79
> ("block: don't check if adjacent bvecs in one bio can be mergeable").
>
> However commit f6970f83ef79 only covers merge code which isn't used by
> bio driver at all, so not sure pre-6.9-rc is broken for stacking driver.
We can stack rq drivers as well.
> Also commit 09324d32d2a0 mentioned that it did not cause problem,
> actually 64K default segment size limits always exists even though the
> device doesn't provide one, so looks there isn't report as 'real bugs',
> or maybe I miss something?
The problem is when the segment size does not align to the boundary
mask as you'll now start feeding malformed segments/entris to the
device.
