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authorDhaval Giani <dhaval@linux.vnet.ibm.com>2007-10-15 17:00:14 +0200
committerIngo Molnar <mingo@elte.hu>2007-10-15 17:00:14 +0200
commit5cb350baf580017da38199625b7365b1763d7180 (patch)
tree3830339798b1c6f19f1580700ea6ba240fb56ef2 /kernel/ksysfs.c
parent8ca0e14ffb12c257de591571a9e96102acdb1c64 (diff)
downloadlinux-2.6.34-ux500-5cb350baf580017da38199625b7365b1763d7180.tar.gz
sched: group scheduling, sysfs tunables
Add tunables in sysfs to modify a user's cpu share. A directory is created in sysfs for each new user in the system. /sys/kernel/uids/<uid>/cpu_share Reading this file returns the cpu shares granted for the user. Writing into this file modifies the cpu share for the user. Only an administrator is allowed to modify a user's cpu share. Ex: # cd /sys/kernel/uids/ # cat 512/cpu_share 1024 # echo 2048 > 512/cpu_share # cat 512/cpu_share 2048 # Signed-off-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com> Signed-off-by: Dhaval Giani <dhaval@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/ksysfs.c')
-rw-r--r--kernel/ksysfs.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c
index d0e5c48e18c..6046939d080 100644
--- a/kernel/ksysfs.c
+++ b/kernel/ksysfs.c
@@ -14,6 +14,7 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kexec.h>
+#include <linux/sched.h>
#define KERNEL_ATTR_RO(_name) \
static struct subsys_attribute _name##_attr = __ATTR_RO(_name)
@@ -116,6 +117,13 @@ static int __init ksysfs_init(void)
&notes_attr);
}
+ /*
+ * Create "/sys/kernel/uids" directory and corresponding root user's
+ * directory under it.
+ */
+ if (!error)
+ error = uids_kobject_init();
+
return error;
}