16 Mar
2020
16 Mar
'20
6:17 p.m.
On Mon, Mar 16, 2020 at 06:52:58PM +0100, Christoph Hellwig wrote:
Add a new opaque owner field to struct dev_pagemap, which will allow the hmm and migrate_vma code to identify who owns ZONE_DEVICE memory, and refuse to work on mappings not owned by the calling entity.
Using a pointer seems like a good solution to me.
Is this a bug fix? What is the downside for migrate on pages it doesn't work? I'm not up to speed on migrate..
Jason