On 07.12.20 21:48, Jason Andryuk wrote:
On Mon, Dec 7, 2020 at 8:30 AM Juergen Gross <jgr...@suse.com> wrote:Commit 9e2369c06c8a18 ("xen: add helpers to allocate unpopulated memory") introduced usage of ZONE_DEVICE memory for foreign memory mappings. Unfortunately this collides with using page->lru for Xen backend private page caches. Fix that by using page->zone_device_data instead. Fixes: 9e2369c06c8a18 ("xen: add helpers to allocate unpopulated memory") Signed-off-by: Juergen Gross <jgr...@suse.com>Would it make sense to add BUG_ON(is_zone_device_page(page)) and the opposite as appropriate to cache_enq?
No, I don't think so. At least in the CONFIG_ZONE_DEVICE case the initial list in a PV dom0 is populated from extra memory (basically the same, but not marked as zone device memory explicitly). Juergen
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