Messages in this thread | | | Date | Sat, 21 Oct 2017 10:11:40 +0200 | From | Christoph Hellwig <> | Subject | Re: [PATCH v3 12/13] dax: handle truncate of dma-busy pages |
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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.
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