init: Add support for specifying a services i/o priority
Signed-off-by: San Mehat <san@google.com>
diff --git a/init/init.c b/init/init.c
index 16a3530..4d98cc2 100755
--- a/init/init.c
+++ b/init/init.c
@@ -35,6 +35,7 @@
#include <sys/reboot.h>
#include <cutils/sockets.h>
+#include <cutils/iosched_policy.h>
#include <termios.h>
#include <linux/kd.h>
#include <linux/keychord.h>
@@ -224,6 +225,13 @@
}
}
+ if (svc->ioprio_class != IoSchedClass_NONE) {
+ if (android_set_ioprio(getpid(), svc->ioprio_class, svc->ioprio_pri)) {
+ ERROR("Failed to set pid %d ioprio = %d,%d: %s\n",
+ getpid(), svc->ioprio_class, svc->ioprio_pri, strerror(errno));
+ }
+ }
+
if (needs_console) {
setsid();
open_console();
diff --git a/init/init.h b/init/init.h
index 60c3055..8c0571c 100644
--- a/init/init.h
+++ b/init/init.h
@@ -146,6 +146,9 @@
int nkeycodes;
int keychord_id;
+ int ioprio_class;
+ int ioprio_pri;
+
int nargs;
/* "MUST BE AT THE END OF THE STRUCT" */
char *args[1];
diff --git a/init/keywords.h b/init/keywords.h
index 308118e..254c785 100644
--- a/init/keywords.h
+++ b/init/keywords.h
@@ -75,6 +75,7 @@
KEYWORD(chmod, COMMAND, 2, do_chmod)
KEYWORD(loglevel, COMMAND, 1, do_loglevel)
KEYWORD(device, COMMAND, 4, do_device)
+ KEYWORD(ioprio, OPTION, 0, 0)
#ifdef __MAKE_KEYWORD_ENUM__
KEYWORD_COUNT,
};
diff --git a/init/parser.c b/init/parser.c
index 54622cc..7da0d19 100644
--- a/init/parser.c
+++ b/init/parser.c
@@ -10,6 +10,8 @@
#include "init.h"
#include "property_service.h"
+#include <cutils/iosched_policy.h>
+
#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
#include <sys/_system_properties.h>
@@ -155,6 +157,7 @@
if (!strcmp(s, "ostname")) return K_hostname;
break;
case 'i':
+ if (!strcmp(s, "oprio")) return K_ioprio;
if (!strcmp(s, "fup")) return K_ifup;
if (!strcmp(s, "nsmod")) return K_insmod;
if (!strcmp(s, "mport")) return K_import;
@@ -619,6 +622,8 @@
return;
}
+ svc->ioprio_class = IoSchedClass_NONE;
+
kw = lookup_keyword(args[0]);
switch (kw) {
case K_capability:
@@ -636,6 +641,28 @@
case K_disabled:
svc->flags |= SVC_DISABLED;
break;
+ case K_ioprio:
+ if (nargs != 3) {
+ parse_error(state, "ioprio optin usage: ioprio <rt|be|idle> <ioprio 0-7>\n");
+ } else {
+ svc->ioprio_pri = strtoul(args[2], 0, 8);
+
+ if (svc->ioprio_pri < 0 || svc->ioprio_pri > 7) {
+ parse_error(state, "priority value must be range 0 - 7\n");
+ break;
+ }
+
+ if (!strcmp(args[1], "rt")) {
+ svc->ioprio_class = IoSchedClass_RT;
+ } else if (!strcmp(args[1], "be")) {
+ svc->ioprio_class = IoSchedClass_BE;
+ } else if (!strcmp(args[1], "idle")) {
+ svc->ioprio_class = IoSchedClass_IDLE;
+ } else {
+ parse_error(state, "ioprio option usage: ioprio <rt|be|idle> <0-7>\n");
+ }
+ }
+ break;
case K_group:
if (nargs < 2) {
parse_error(state, "group option requires a group id\n");