core: always use "infinity" for no upper limit instead of "max" (#3417)

Recently added cgroup unified hierarchy support uses "max" in configurations
for no upper limit.  While consistent with what the kernel uses for no upper
limit, it is inconsistent with what systemd uses for other controllers such as
memory or pids.  There's no point in introducing another term.  Update cgroup
unified hierarchy support so that "infinity" is the only term that systemd
uses for no upper limit.

diff --git a/man/systemd.resource-control.xml b/man/systemd.resource-control.xml
index 570619a..d4c8fa7 100644 (file)
--- a/man/systemd.resource-control.xml
+++ b/man/systemd.resource-control.xml
@@ -248,7 +248,7 @@
 
           <para>Takes a memory size in bytes. If the value is suffixed with K, M, G or T, the specified memory size is
           parsed as Kilobytes, Megabytes, Gigabytes, or Terabytes (with the base 1024), respectively. If assigned the
-          special value <literal>max</literal>, no memory limit is applied. This controls the
+          special value <literal>infinity</literal>, no memory limit is applied. This controls the
           <literal>memory.high</literal> control group attribute. For details about this control group attribute, see
           <ulink url="https://www.kernel.org/doc/Documentation/cgroup-v2.txt">cgroup-v2.txt</ulink>.</para>
 
@@ -269,7 +269,7 @@
 
           <para>Takes a memory size in bytes. If the value is suffixed with K, M, G or T, the specified memory size is
           parsed as Kilobytes, Megabytes, Gigabytes, or Terabytes (with the base 1024), respectively. If assigned the
-          special value <literal>max</literal>, no memory limit is applied. This controls the
+          special value <literal>infinity</literal>, no memory limit is applied. This controls the
           <literal>memory.max</literal> control group attribute. For details about this control group attribute, see
           <ulink url="https://www.kernel.org/doc/Documentation/cgroup-v2.txt">cgroup-v2.txt</ulink>.</para>
 

diff --git a/src/core/load-fragment.c b/src/core/load-fragment.c
index 50ff718..b53301a 100644 (file)
--- a/src/core/load-fragment.c
+++ b/src/core/load-fragment.c
@@ -2811,7 +2811,7 @@ int config_parse_memory_limit(
         uint64_t bytes = CGROUP_LIMIT_MAX;
         int r;
 
-        if (!isempty(rvalue) && !streq(rvalue, "infinity") && !streq(rvalue, "max")) {
+        if (!isempty(rvalue) && !streq(rvalue, "infinity")) {
                 r = parse_size(rvalue, 1024, &bytes);
                 if (r < 0 || bytes < 1) {
                         log_syntax(unit, LOG_ERR, filename, line, r, "Memory limit '%s' invalid. Ignoring.", rvalue);
@@ -3080,7 +3080,7 @@ int config_parse_io_limit(
                 return 0;
         }
 
-        if (streq("max", limit)) {
+        if (streq("infinity", limit)) {
                 num = CGROUP_LIMIT_MAX;
         } else {
                 r = parse_size(limit, 1000, &num);

diff --git a/src/shared/bus-unit-util.c b/src/shared/bus-unit-util.c
index 502e98d..bf0b2e8 100644 (file)
--- a/src/shared/bus-unit-util.c
+++ b/src/shared/bus-unit-util.c
@@ -169,7 +169,7 @@ int bus_append_unit_property_assignment(sd_bus_message *m, const char *assignmen
         } else if (STR_IN_SET(field, "MemoryLow", "MemoryHigh", "MemoryMax", "MemoryLimit")) {
                 uint64_t bytes;
 
-                if (isempty(eq) || streq(eq, "max") || streq(eq, "infinity"))
+                if (isempty(eq) || streq(eq, "infinity"))
                         bytes = CGROUP_LIMIT_MAX;
                 else {
                         r = parse_size(eq, 1024, &bytes);
@@ -306,7 +306,7 @@ int bus_append_unit_property_assignment(sd_bus_message *m, const char *assignmen
                                 return -EINVAL;
                         }
 
-                        if (streq(bandwidth, "max")) {
+                        if (streq(bandwidth, "infinity")) {
                                 bytes = CGROUP_LIMIT_MAX;
                         } else {
                                 r = parse_size(bandwidth, 1000, &bytes);