> Folios of order 1 have no space to store the deferred list. This is > not a problem for the page cache as file-backed folios are never > placed on the deferred list. All we need to do is prevent the core > MM from touching the deferred list for order 1 folios and remove the > code which prevented us from allocating order 1 folios. I rebased this patch on top of the lbs tree[1] and ran 3 xfstests loop with 8k XFS blocksize on a 4k PAGE_SIZE machine. The tests ran fine and nothing stood out apart from some known failures. Are you planning to send a new version of this patch (there are some conflicts with the latest baseline)? I can also add it along with the LBS minorder series that I will be sending out in a week or so, if you are busy. -- Pankaj [1] https://github.com/Panky-codes/linux/commits/large-block-minorder-6.8.0-rc2-v1-8k/
