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authorLennart Poettering <lennart@poettering.net>2016-06-08 20:52:06 +0200
committerLennart Poettering <lennart@poettering.net>2016-06-14 20:01:45 +0200
commitd58d600efdcbefa38247861a1df032d1a8fda606 (patch)
treed85cd03eb618e4012801b9c3b215fafc54726515 /src/core/dbus-cgroup.c
parentd8cf2ac79b524d7784bccb428295ebc9c5e8548c (diff)
systemctl: allow percent-based MemoryLimit= settings via systemctl set-property
The unit files already accept relative, percent-based memory limit specification, let's make sure "systemctl set-property" support this too. Since we want the physical memory size of the destination machine to apply we pass the percentage in a new set of properties that only exist for this purpose, and can only be set.
Diffstat (limited to 'src/core/dbus-cgroup.c')
-rw-r--r--src/core/dbus-cgroup.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/src/core/dbus-cgroup.c b/src/core/dbus-cgroup.c
index fe035109e3..27bbe2d26d 100644
--- a/src/core/dbus-cgroup.c
+++ b/src/core/dbus-cgroup.c
@@ -856,6 +856,38 @@ int bus_cgroup_set_property(
return 1;
+ } else if (STR_IN_SET(name, "MemoryLowByPhysicalMemory", "MemoryHighByPhysicalMemory", "MemoryMaxByPhysicalMemory")) {
+ uint32_t raw;
+ uint64_t v;
+
+ r = sd_bus_message_read(message, "u", &raw);
+ if (r < 0)
+ return r;
+
+ v = physical_memory_scale(raw, UINT32_MAX);
+ if (v <= 0 || v == UINT64_MAX)
+ return sd_bus_error_set_errnof(error, EINVAL, "%s= is out of range", name);
+
+ if (mode != UNIT_CHECK) {
+ const char *e;
+
+ /* Chop off suffix */
+ assert_se(e = endswith(name, "ByPhysicalMemory"));
+ name = strndupa(name, e - name);
+
+ if (streq(name, "MemoryLow"))
+ c->memory_low = v;
+ else if (streq(name, "MemoryHigh"))
+ c->memory_high = v;
+ else
+ c->memory_max = v;
+
+ unit_invalidate_cgroup(u, CGROUP_MASK_MEMORY);
+ unit_write_drop_in_private_format(u, mode, name, "%s=%" PRIu32 "%%", name, (uint32_t) (DIV_ROUND_UP((uint64_t) raw * 100, (uint64_t) UINT32_MAX)));
+ }
+
+ return 1;
+
} else if (streq(name, "MemoryLimit")) {
uint64_t limit;
@@ -877,6 +909,26 @@ int bus_cgroup_set_property(
return 1;
+ } else if (streq(name, "MemoryLimitByPhysicalMemory")) {
+ uint64_t limit;
+ uint32_t raw;
+
+ r = sd_bus_message_read(message, "u", &raw);
+ if (r < 0)
+ return r;
+
+ limit = physical_memory_scale(raw, UINT32_MAX);
+ if (limit <= 0 || limit == UINT64_MAX)
+ return sd_bus_error_set_errnof(error, EINVAL, "%s= is out of range", name);
+
+ if (mode != UNIT_CHECK) {
+ c->memory_limit = limit;
+ unit_invalidate_cgroup(u, CGROUP_MASK_MEMORY);
+ unit_write_drop_in_private_format(u, mode, "MemoryLimit", "MemoryLimit=%" PRIu32 "%%", (uint32_t) (DIV_ROUND_UP((uint64_t) raw * 100, (uint64_t) UINT32_MAX)));
+ }
+
+ return 1;
+
} else if (streq(name, "DevicePolicy")) {
const char *policy;
CGroupDevicePolicy p;