Hello Dan & Gotou-san, Many thanks for your remarks for the test cases For the qemu tests I used modified qemu and sebios, therefore some 'strange' cases are only testable on virtual setups - thanks for making it clear which configurations are supported in real life
>> >> [4] Physical machine: 2 CFMWS + Host-bridge + 2 CXL devices >> >> kernel: BIOS-e820: [mem 0x0000002070000000-0x000000a06fffffff] soft >> reserved >> >> 2070000000-606fffffff : CXL Window 0 >> 2070000000-606fffffff : region0 >> 2070000000-606fffffff : dax0.0 >> 2070000000-606fffffff : System RAM (kmem) 6070000000-a06fffffff >> : CXL Window 1 >> 6070000000-a06fffffff : region1 >> 6070000000-a06fffffff : dax1.0 >> 6070000000-a06fffffff : System RAM (kmem) > >Ok, so a real world maching that creates a merged >0x0000002070000000-0x000000a06fffffff range. Can you confirm that the SRAT has >separate entries for those ranges? >Otherwise, need to rethink how to keep >this fallback algorithm simple and predictable. I looked into the syslogs and I see the SRAT has separate entries: [ 0.005128] [ T0] ACPI: SRAT: Node 2 PXM 2 [mem 0x2070000000-0x606fffffff] hotplug [ 0.005129] [ T0] ACPI: SRAT: Node 2 PXM 2 [mem 0x6070000000-0xa06fffffff] hotplug
