Reduced number of threads used in cephadm on ARMv7 system - 10 threads may run out of total memory

ceph-15.2.4-arm32_fix.patch

@@ -111,6 +111,18 @@ diff -uNr ceph-15.2.4/src/mds/PurgeQueue.h ceph-15.2.4-arm32_fix/src/mds/PurgeQu
 +  size_t files_high_water = 0;
  };
  #endif
+diff -uNr ceph-15.2.4/src/pybind/mgr/cephadm/module.py ceph-15.2.4-arm32_fix/src/pybind/mgr/cephadm/module.py
+--- ceph-15.2.4/src/pybind/mgr/cephadm/module.py	2020-07-01 01:10:51.000000000 +0930
++++ ceph-15.2.4-arm32_fix/src/pybind/mgr/cephadm/module.py	2020-11-24 13:47:15.048603596 +1030
+@@ -284,7 +284,7 @@
+             raise RuntimeError("unable to read cephadm at '%s': %s" % (
+                 path, str(e)))
+ 
+-        self._worker_pool = multiprocessing.pool.ThreadPool(10)
++        self._worker_pool = multiprocessing.pool.ThreadPool(3)
+ 
+         self._reconfig_ssh()
+ 
 diff -uNr ceph-15.2.4/src/pybind/mgr/dashboard/frontend/package.json ceph-15.2.4-arm32_fix/src/pybind/mgr/dashboard/frontend/package.json
 --- ceph-15.2.4/src/pybind/mgr/dashboard/frontend/package.json	2020-07-01 01:10:51.000000000 +0930
 +++ ceph-15.2.4-arm32_fix/src/pybind/mgr/dashboard/frontend/package.json	2020-11-21 22:11:16.065796889 +1030