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authorLennart Poettering <lennart@poettering.net>2014-05-22 07:06:16 +0900
committerLennart Poettering <lennart@poettering.net>2014-05-22 07:13:56 +0900
commitdb785129c9bce9294a118484cbc9bb6935ca34c2 (patch)
treea1c9508390cffe4eafc0592701ad566bba672b93 /src/core/cgroup.c
parent95ae05c0e79868c22b3e8e6fbc53432786876730 (diff)
cgroup: rework startup logic
Introduce a (unsigned long) -1 as "unset" state for cpu shares/block io weights, and keep the startup unit set around all the time.
Diffstat (limited to 'src/core/cgroup.c')
-rw-r--r--src/core/cgroup.c60
1 files changed, 27 insertions, 33 deletions
diff --git a/src/core/cgroup.c b/src/core/cgroup.c
index 80a55755a5..34905892ba 100644
--- a/src/core/cgroup.c
+++ b/src/core/cgroup.c
@@ -33,13 +33,11 @@ void cgroup_context_init(CGroupContext *c) {
/* Initialize everything to the kernel defaults, assuming the
* structure is preinitialized to 0 */
- c->cpu_shares = 1024;
- c->startup_cpu_shares = 1024;
- c->startup_cpu_shares_set = false;
+ c->cpu_shares = (unsigned long) -1;
+ c->startup_cpu_shares = (unsigned long) -1;
c->memory_limit = (uint64_t) -1;
- c->blockio_weight = 1000;
- c->startup_blockio_weight = 1000;
- c->startup_blockio_weight_set = false;
+ c->blockio_weight = (unsigned long) -1;
+ c->startup_blockio_weight = (unsigned long) -1;
c->cpu_quota_per_sec_usec = (usec_t) -1;
c->cpu_quota_usec = (usec_t) -1;
@@ -314,7 +312,7 @@ fail:
return -errno;
}
-void cgroup_context_apply(Manager *m, CGroupContext *c, CGroupControllerMask mask, const char *path) {
+void cgroup_context_apply(CGroupContext *c, CGroupControllerMask mask, const char *path, ManagerState state) {
bool is_root;
int r;
@@ -332,9 +330,9 @@ void cgroup_context_apply(Manager *m, CGroupContext *c, CGroupControllerMask mas
char buf[MAX(DECIMAL_STR_MAX(unsigned long), DECIMAL_STR_MAX(usec_t)) + 1];
usec_t q;
- sprintf(buf, "%lu\n", manager_state(m) == MANAGER_STARTING
- ? c->startup_cpu_shares
- : c->cpu_shares);
+ sprintf(buf, "%lu\n",
+ state == MANAGER_STARTING && c->startup_cpu_shares != (unsigned long) -1 ? c->startup_cpu_shares :
+ c->cpu_shares != (unsigned long) -1 ? c->cpu_shares : 1024);
r = cg_set_attribute("cpu", path, "cpu.shares", buf);
if (r < 0)
log_warning("Failed to set cpu.shares on %s: %s", path, strerror(-r));
@@ -362,9 +360,8 @@ void cgroup_context_apply(Manager *m, CGroupContext *c, CGroupControllerMask mas
CGroupBlockIODeviceBandwidth *b;
if (!is_root) {
- sprintf(buf, "%lu\n", manager_state(m) == MANAGER_STARTING
- ? c->startup_blockio_weight
- : c->blockio_weight);
+ sprintf(buf, "%lu\n", state == MANAGER_STARTING && c->startup_blockio_weight != (unsigned long) -1 ? c->startup_blockio_weight :
+ c->blockio_weight != (unsigned long) -1 ? c->blockio_weight : 1000);
r = cg_set_attribute("blkio", path, "blkio.weight", buf);
if (r < 0)
log_warning("Failed to set blkio.weight on %s: %s", path, strerror(-r));
@@ -474,30 +471,24 @@ void cgroup_context_apply(Manager *m, CGroupContext *c, CGroupControllerMask mas
}
}
-CGroupControllerMask cgroup_context_get_mask(Manager *m, CGroupContext *c) {
+CGroupControllerMask cgroup_context_get_mask(CGroupContext *c) {
CGroupControllerMask mask = 0;
/* Figure out which controllers we need */
if (c->cpu_accounting ||
- (manager_state(m) == MANAGER_STARTING ? c->startup_cpu_shares : c->cpu_shares) != 1024 ||
- (manager_state(m) != MANAGER_STARTING && c->startup_cpu_shares_set && c->startup_cpu_shares != c->cpu_shares) ||
+ c->cpu_shares != (unsigned long) -1 ||
+ c->startup_cpu_shares != (unsigned long) -1 ||
c->cpu_quota_usec != (usec_t) -1 ||
- c->cpu_quota_per_sec_usec != (usec_t) -1) {
+ c->cpu_quota_per_sec_usec != (usec_t) -1)
mask |= CGROUP_CPUACCT | CGROUP_CPU;
- if (manager_state(m) != MANAGER_STARTING)
- c->startup_cpu_shares_set = false;
- }
if (c->blockio_accounting ||
- (manager_state(m) == MANAGER_STARTING ? c->startup_blockio_weight : c->blockio_weight) != 1000 ||
- (manager_state(m) != MANAGER_STARTING && c->startup_blockio_weight_set && c->startup_blockio_weight != c->blockio_weight) ||
+ c->blockio_weight != (unsigned long) -1 ||
+ c->startup_blockio_weight != (unsigned long) -1 ||
c->blockio_device_weights ||
- c->blockio_device_bandwidths) {
+ c->blockio_device_bandwidths)
mask |= CGROUP_BLKIO;
- if (manager_state(m) != MANAGER_STARTING)
- c->startup_blockio_weight_set = false;
- }
if (c->memory_accounting ||
c->memory_limit != (uint64_t) -1)
@@ -516,7 +507,7 @@ CGroupControllerMask unit_get_cgroup_mask(Unit *u) {
if (!c)
return 0;
- return cgroup_context_get_mask(u->manager, c);
+ return cgroup_context_get_mask(c);
}
CGroupControllerMask unit_get_members_mask(Unit *u) {
@@ -691,7 +682,7 @@ static bool unit_has_mask_realized(Unit *u, CGroupControllerMask mask) {
* If not, create paths, move processes over, and set attributes.
*
* Returns 0 on success and < 0 on failure. */
-static int unit_realize_cgroup_now(Unit *u) {
+static int unit_realize_cgroup_now(Unit *u, ManagerState state) {
CGroupControllerMask mask;
int r;
@@ -709,7 +700,7 @@ static int unit_realize_cgroup_now(Unit *u) {
/* First, realize parents */
if (UNIT_ISSET(u->slice)) {
- r = unit_realize_cgroup_now(UNIT_DEREF(u->slice));
+ r = unit_realize_cgroup_now(UNIT_DEREF(u->slice), state);
if (r < 0)
return r;
}
@@ -720,7 +711,7 @@ static int unit_realize_cgroup_now(Unit *u) {
return r;
/* Finally, apply the necessary attributes. */
- cgroup_context_apply(u->manager, unit_get_cgroup_context(u), mask, u->cgroup_path);
+ cgroup_context_apply(unit_get_cgroup_context(u), mask, u->cgroup_path, state);
return 0;
}
@@ -735,14 +726,17 @@ static void unit_add_to_cgroup_queue(Unit *u) {
}
unsigned manager_dispatch_cgroup_queue(Manager *m) {
- Unit *i;
+ ManagerState state;
unsigned n = 0;
+ Unit *i;
int r;
+ state = manager_state(m);
+
while ((i = m->cgroup_queue)) {
assert(i->in_cgroup_queue);
- r = unit_realize_cgroup_now(i);
+ r = unit_realize_cgroup_now(i, state);
if (r < 0)
log_warning("Failed to realize cgroups for queued unit %s: %s", i->id, strerror(-r));
@@ -814,7 +808,7 @@ int unit_realize_cgroup(Unit *u) {
unit_queue_siblings(u);
/* And realize this one now (and apply the values) */
- return unit_realize_cgroup_now(u);
+ return unit_realize_cgroup_now(u, manager_state(u->manager));
}
void unit_destroy_cgroup(Unit *u) {