[LTP] [linux-next:master] [block/bdev] 3c20917120: BUG:sleeping_function_called_from_invalid_context_at_mm/util.c

[Luis Chamberlain]

On Tue, Apr 8, 2025 at 10:06 AM Luis Chamberlain <mcgrof@kernel.org> wrote:
> Fun
> puzzle for the community is figuring out *why* oh why did a large folio
> end up being used on buffer-heads for your use case *without* an LBS
> device (logical block size) being present, as I assume you didn't have
> one, ie say a nvme or virtio block device with logical block size  >
> PAGE_SIZE. The area in question would trigger on folio migration *only*
> if you are migrating large buffer-head folios. We only create those

To be clear, large folios for buffer-heads.

> if
> you have an LBS device and are leveraging the block device cache or a
> filesystem with buffer-heads with LBS (they don't exist yet other than
> the block device cache).

  Luis