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home:Alexander_Naumov:SLE-12:Update
xen.1589
xend-max-free-mem.patch
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File xend-max-free-mem.patch of Package xen.1589
Index: xen-4.4.1-testing/tools/python/xen/xend/XendNode.py =================================================================== --- xen-4.4.1-testing.orig/tools/python/xen/xend/XendNode.py +++ xen-4.4.1-testing/tools/python/xen/xend/XendNode.py @@ -949,11 +949,35 @@ class XendNode: info['cpu_mhz'] = info['cpu_khz'] / 1000 - # physinfo is in KiB, need it in MiB - info['total_memory'] = info['total_memory'] / 1024 - info['free_memory'] = info['free_memory'] / 1024 + configured_floor = xendoptions().get_dom0_min_mem() * 1024 + from xen.xend import balloon + try: + kernel_floor = balloon.get_dom0_min_target() + except: + kernel_floor = 0 + dom0_min_mem = max(configured_floor, kernel_floor) + dom0_mem = balloon.get_dom0_current_alloc() + extra_mem = 0 + if dom0_min_mem > 0 and dom0_mem > dom0_min_mem: + extra_mem = dom0_mem - dom0_min_mem + info['free_memory'] = info['free_memory'] + info['scrub_memory'] + info['max_free_memory'] = info['free_memory'] + extra_mem info['free_cpus'] = len(XendCPUPool.unbound_cpus()) + # Convert KiB to MiB, rounding down to be conservative + info['total_memory'] = info['total_memory'] / 1024 + info['free_memory'] = info['free_memory'] / 1024 + info['max_free_memory'] = info['max_free_memory'] / 1024 + + # FIXME: These are hard-coded to be the inverse of the getXenMemory + # functions in image.py. Find a cleaner way. + info['max_para_memory'] = info['max_free_memory'] - 4 + if info['max_para_memory'] < 0: + info['max_para_memory'] = 0 + info['max_hvm_memory'] = int((info['max_free_memory']-12) * (1-2.4/1024)) + if info['max_hvm_memory'] < 0: + info['max_hvm_memory'] = 0 + ITEM_ORDER = ['nr_cpus', 'nr_nodes', 'cores_per_socket', @@ -964,6 +988,9 @@ class XendNode: 'total_memory', 'free_memory', 'free_cpus', + 'max_free_memory', + 'max_para_memory', + 'max_hvm_memory', ] if show_numa != 0: Index: xen-4.4.1-testing/tools/python/xen/xend/balloon.py =================================================================== --- xen-4.4.1-testing.orig/tools/python/xen/xend/balloon.py +++ xen-4.4.1-testing/tools/python/xen/xend/balloon.py @@ -43,6 +43,8 @@ SLEEP_TIME_GROWTH = 0.1 # label actually shown in the PROC_XEN_BALLOON file. #labels = { 'current' : 'Current allocation', # 'target' : 'Requested target', +# 'min-target' : 'Minimum target', +# 'max-target' : 'Maximum target', # 'low-balloon' : 'Low-mem balloon', # 'high-balloon' : 'High-mem balloon', # 'limit' : 'Xen hard limit' } @@ -69,6 +71,23 @@ def get_dom0_target_alloc(): raise VmError('Failed to query target memory allocation of dom0.') return kb +def get_dom0_min_target(): + """Returns the minimum amount of memory (in KiB) that dom0 will accept.""" + + kb = _get_proc_balloon('min-target') + if kb == None: + raise VmError('Failed to query minimum target memory allocation of dom0.') + return kb + +def get_dom0_max_target(): + """Returns the maximum amount of memory (in KiB) that is potentially + visible to dom0.""" + + kb = _get_proc_balloon('max-target') + if kb == None: + raise VmError('Failed to query maximum target memory allocation of dom0.') + return kb + def free(need_mem, dominfo): """Balloon out memory from the privileged domain so that there is the specified required amount (in KiB) free. Index: xen-4.4.1-testing/tools/python/xen/xend/XendDomainInfo.py =================================================================== --- xen-4.4.1-testing.orig/tools/python/xen/xend/XendDomainInfo.py +++ xen-4.4.1-testing/tools/python/xen/xend/XendDomainInfo.py @@ -1477,6 +1477,27 @@ class XendDomainInfo: self.info['abort_if_busy'] = str(abort_if_busy) self.info['log_save_progress'] = str(log_save_progress) + def capAndSetMemoryTarget(self, target): + """Potentially lowers the requested target to the largest possible + value (i.e., caps it), and then sets the memory target of this domain + to that value. + @param target in MiB. + """ + max_target = 0 + if self.domid == 0: + try: + from balloon import get_dom0_max_target + max_target = get_dom0_max_target() / 1024 + except: + # It's nice to cap the max at sane values, but harmless to set + # them high. Carry on. + pass + if max_target and target > max_target: + log.debug("Requested memory target %d MiB; maximum reasonable is %d MiB.", + target, max_target) + target = max_target + self.setMemoryTarget(target) + def setMemoryTarget(self, target): """Set the memory target of this domain. @param target: In MiB. Index: xen-4.4.1-testing/tools/python/xen/xend/server/SrvDomain.py =================================================================== --- xen-4.4.1-testing.orig/tools/python/xen/xend/server/SrvDomain.py +++ xen-4.4.1-testing/tools/python/xen/xend/server/SrvDomain.py @@ -198,7 +198,7 @@ class SrvDomain(SrvDir): def op_mem_target_set(self, _, req): - return self.call(self.dom.setMemoryTarget, + return self.call(self.dom.capAndSetMemoryTarget, [['target', 'int']], req) Index: xen-4.4.1-testing/tools/python/xen/xend/osdep.py =================================================================== --- xen-4.4.1-testing.orig/tools/python/xen/xend/osdep.py +++ xen-4.4.1-testing/tools/python/xen/xend/osdep.py @@ -42,6 +42,8 @@ def _linux_balloon_stat_proc(label): xend2linux_labels = { 'current' : 'Current allocation', 'target' : 'Requested target', + 'min-target' : 'Minimum target', + 'max-target' : 'Maximum target', 'low-balloon' : 'Low-mem balloon', 'high-balloon' : 'High-mem balloon', 'limit' : 'Xen hard limit' }
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