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| author | Dhaval Giani <dhaval@linux.vnet.ibm.com> | 2007-10-15 17:00:14 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2007-10-15 17:00:14 +0200 |
| commit | 5cb350baf580017da38199625b7365b1763d7180 (patch) | |
| tree | 3830339798b1c6f19f1580700ea6ba240fb56ef2 /kernel/ksysfs.c | |
| parent | 8ca0e14ffb12c257de591571a9e96102acdb1c64 (diff) | |
| download | lwn-5cb350baf580017da38199625b7365b1763d7180.tar.gz lwn-5cb350baf580017da38199625b7365b1763d7180.zip | |
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.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c index d0e5c48e18c7..6046939d0804 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) ¬es_attr); } + /* + * Create "/sys/kernel/uids" directory and corresponding root user's + * directory under it. + */ + if (!error) + error = uids_kobject_init(); + return error; } |