> So far this solution only targets xfs since it already implements
> xfs_break_layouts in all the locations that would need this
> synchronization. It applies on top of the vmem_altmap / dev_pagemap
> reworks from Christoph.
Those got a rebase since your posting of this series, btw.
_
Changes since v3 [1]:
* Kill the i_daxdma_lock, and do not impose any new locking constraints
on filesystem implementations (Dave)
* Reuse the existing i_mmap_lock for synchronizing against
get_user_pages() by unmapping and causing punch-hole/truncate to
re-fault the page before get_user_pag
