On 5/11/24 00:25, Matthew Wilcox wrote:
On Fri, May 10, 2024 at 12:29:04PM +0200, hare@xxxxxxxxxx wrote:
From: Hannes Reinecke <hare@xxxxxxx>
We now can support blocksizes larger than PAGE_SIZE, so lift
the restriction.
Do we need to make this conditional on a CONFIG option? Not all
architectures support THP yet ... which means they don't support
large folios. We should fix that, but it is well below the cutoff line
on my todo list.
Well. We will only ever trigger this if we _really_ encounter a block
device with a block size larger than PAGE_SIZE.
If which there currently are none (note to self: check NFS).
And the overall idea is that the logical blocksize is mandatory, ie the
device _cannot_ handle requests with shorter blocksizes.
We might be setting min_order == max_order, but again this can be
discussed once we get min_order working :-)
Cheers,
Hannes
--
Dr. Hannes Reinecke Kernel Storage Architect
hare@xxxxxxx +49 911 74053 688
SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg
HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich
