Re: [PATCH v3 12/13] dax: handle truncate of dma-busy pages
On Fri, Oct 20, 2017 at 10:27:22AM -0700, Dan Williams wrote:
I'll take a look at hooking this up through a page-idle callback.
Can
I get some breadcrumbs to grep for from XFS folks on how to set/clear
the busy state of extents?
As Brian pointed out it's the xfs_extent_busy.c file (and I pointed
out the same in a reply to the previous series). Be careful because
you'll need a refcount or flags now that there are different busy
reasons.
I still think we'd be better off just blocking on an elevated page
count directly in truncate as that will avoid all the busy list
manipulations.