CP-310822: upstream patchqueue entries for XS9

[mg12]

This PR contains the same patches for XS9 that were present in the patchqueue.

I organised the PR so that each merge corresponds to an entry in the patchqueue:

• 0004-rrd3.patch
• 0003-CP-53658-adapt-claim_pages-to-version-in-xen-4.21-wi.patch
• 0005-xenopsd-xc-do-not-try-keep-track-of-free-memory-when.patch
• 0005-rrd4.patch

The behaviour is unchanged compared to the patchqueue (the code is the same).

Tested with BVT 233166.
Verified that the RRD metrics in the patches are preserved as expected, using:

# xe vm-list params=all| grep numa
                        numa-optimised ( RO): true
                            numa-nodes ( RO): 1
                      numa-node-memory (MRO): 0: 2149572608; 1: 0

# rrd2csv AVERAGE:::numa_nodes
timestamp, AVERAGE:vm:5d9459d1-7209-ee36-e404-c6b537aa2cd3:numa_nodes
2026-01-19T13:30:15Z, 1
2026-01-19T13:30:20Z, 1
^C
[# rrd2csv AVERAGE:::memory_numa_node
timestamp, AVERAGE:vm:5d9459d1-7209-ee36-e404-c6b537aa2cd3:memory_numa_node_1, AVERAGE:vm:5d9459d1-7209-ee36-e404-c6b537aa2cd3:memory_numa_node_0
2026-01-19T13:30:25Z, 0, 2149572608
2026-01-19T13:30:30Z, 0, 2149572608
2026-01-19T13:30:35Z, 0, 2149572608
^C

[robhoes]

/usr/bin/ld: ocaml/libs/xenctrl-ext/libxenctrl_ext_stubs.a(xenctrlext_stubs.o): in function `stub_xenctrlext_domain_claim_pages':
/home/runner/work/xen-api/xen-api/_build/default/ocaml/libs/xenctrl-ext/xenctrlext_stubs.c:688: undefined reference to `xc_domain_claim_pages_node'
collect2: error: ld returned 1 exit status
File "caml_startup", line 1:
Error: Error during linking (exit code 1)

@mg12 looks like this needs:

• a reformat
• the function above added to the mock bindings in xapi-project/xenctrl

[mg12]

4eb2ca1 passed BVT 233201, and has the RRD metrics as expected:

[root@genus-35-110d ~]# xe vm-list params=all | grep numa
                        numa-optimised ( RO): true
                            numa-nodes ( RO): 1
                      numa-node-memory (MRO): 0: 2149568512
[root@genus-35-110d ~]# rrd2csv AVERAGE:::numa_nodes
timestamp, AVERAGE:vm:38664a5b-b0c0-ae5e-c01e-54ddd1b1bbe6:numa_nodes
2026-01-20T23:35:25Z, 1
2026-01-20T23:35:30Z, 1
^C
[root@genus-35-110d ~]# rrd2csv AVERAGE:::memory_numa_node
timestamp, AVERAGE:vm:38664a5b-b0c0-ae5e-c01e-54ddd1b1bbe6:memory_numa_node_0
2026-01-20T23:35:40Z, 2149568512
2026-01-20T23:35:45Z, 2149568512
^C