1 files changed, 22 insertions, 5 deletions

diff --git a/bitbake/lib/bb/runqueue.py b/bitbake/lib/bb/runqueue.py
index bc1cbb360f..d0ffe3932c 100644
--- a/bitbake/lib/bb/runqueue.py
+++ b/bitbake/lib/bb/runqueue.py
@@ -168,11 +168,15 @@ class RunQueueScheduler(object):
         openSUSE /proc/pressure/* files have readable file permissions but when read the error EOPNOTSUPP (Operation not supported)
         is returned.
         """
-        if self.rq.max_cpu_pressure or self.rq.max_io_pressure:
+        if self.rq.max_cpu_pressure or self.rq.max_io_pressure or self.rq.max_memory_pressure:
             try:
-                with open("/proc/pressure/cpu") as cpu_pressure_fds, open("/proc/pressure/io") as io_pressure_fds:
+                with open("/proc/pressure/cpu") as cpu_pressure_fds, \
+                    open("/proc/pressure/io") as io_pressure_fds, \
+                    open("/proc/pressure/memory") as memory_pressure_fds:
+
                     self.prev_cpu_pressure = cpu_pressure_fds.readline().split()[4].split("=")[1]
                     self.prev_io_pressure = io_pressure_fds.readline().split()[4].split("=")[1]
+                    self.prev_memory_pressure = memory_pressure_fds.readline().split()[4].split("=")[1]
                     self.prev_pressure_time = time.time()
                 self.check_pressure = True
             except:
@@ -184,21 +188,26 @@ class RunQueueScheduler(object):
     def exceeds_max_pressure(self):
         """
         Monitor the difference in total pressure at least once per second, if
-        BB_PRESSURE_MAX_{CPU|IO} are set, return True if above threshold.
+        BB_PRESSURE_MAX_{CPU|IO|MEMORY} are set, return True if above threshold.
         """
         if self.check_pressure:
-            with open("/proc/pressure/cpu") as cpu_pressure_fds, open("/proc/pressure/io") as io_pressure_fds:
+            with open("/proc/pressure/cpu") as cpu_pressure_fds, \
+                open("/proc/pressure/io") as io_pressure_fds, \
+                open("/proc/pressure/memory") as memory_pressure_fds:
                 # extract "total" from /proc/pressure/{cpu|io}
                 curr_cpu_pressure = cpu_pressure_fds.readline().split()[4].split("=")[1]
                 curr_io_pressure = io_pressure_fds.readline().split()[4].split("=")[1]
+                curr_memory_pressure = memory_pressure_fds.readline().split()[4].split("=")[1]
                 exceeds_cpu_pressure =  self.rq.max_cpu_pressure and (float(curr_cpu_pressure) - float(self.prev_cpu_pressure)) > self.rq.max_cpu_pressure
                 exceeds_io_pressure =  self.rq.max_io_pressure and (float(curr_io_pressure) - float(self.prev_io_pressure)) > self.rq.max_io_pressure
+                exceeds_memory_pressure = self.rq.max_memory_pressure and (float(curr_memory_pressure) - float(self.prev_memory_pressure)) > self.rq.max_memory_pressure
                 now = time.time()
                 if now - self.prev_pressure_time > 1.0:
                     self.prev_cpu_pressure = curr_cpu_pressure
                     self.prev_io_pressure = curr_io_pressure
+                    self.prev_memory_pressure = curr_memory_pressure
                     self.prev_pressure_time = now
-            return (exceeds_cpu_pressure or exceeds_io_pressure)
+            return (exceeds_cpu_pressure or exceeds_io_pressure or exceeds_memory_pressure)
         return False
 
     def next_buildable_task(self):
@@ -1748,6 +1757,7 @@ class RunQueueExecute:
         self.scheduler = self.cfgData.getVar("BB_SCHEDULER") or "speed"
         self.max_cpu_pressure = self.cfgData.getVar("BB_PRESSURE_MAX_CPU")
         self.max_io_pressure = self.cfgData.getVar("BB_PRESSURE_MAX_IO")
+        self.max_memory_pressure = self.cfgData.getVar("BB_PRESSURE_MAX_MEMORY")
 
         self.sq_buildable = set()
         self.sq_running = set()
@@ -1798,6 +1808,13 @@ class RunQueueExecute:
             if self.max_io_pressure > upper_limit:
                 bb.warn("Your build will be largely unregulated since BB_PRESSURE_MAX_IO is set to %s. It is very unlikely that such high pressure will be experienced." % (self.max_io_pressure))
 
+        if self.max_memory_pressure:
+            self.max_memory_pressure = float(self.max_memory_pressure)
+            if self.max_memory_pressure < lower_limit:
+                bb.fatal("Invalid BB_PRESSURE_MAX_MEMORY %s, minimum value is %s." % (self.max_memory_pressure, lower_limit))
+            if self.max_memory_pressure > upper_limit:
+                bb.warn("Your build will be largely unregulated since BB_PRESSURE_MAX_MEMORY is set to %s. It is very unlikely that such high pressure will be experienced." % (self.max_io_pressure))
+            
         # List of setscene tasks which we've covered
         self.scenequeue_covered = set()
         # List of tasks which are covered (including setscene ones)