linux/arch/x86/kernel/cpu/resctrl
Xiaochen Shen 47820e73f5 x86/resctrl: Initialize a new resource group with default MBA values
Currently, when a new resource group is created, the allocation values
of the MBA resource are not initialized and remain meaningless data.

For example:

  mkdir /sys/fs/resctrl/p1
  cat /sys/fs/resctrl/p1/schemata
  MB:0=100;1=100

  echo "MB:0=10;1=20" > /sys/fs/resctrl/p1/schemata
  cat /sys/fs/resctrl/p1/schemata
  MB:0= 10;1= 20

  rmdir /sys/fs/resctrl/p1
  mkdir /sys/fs/resctrl/p2
  cat /sys/fs/resctrl/p2/schemata
  MB:0= 10;1= 20

Therefore, when the new group is created, it is reasonable to initialize
MBA resource with default values.

Initialize the MBA resource and cache resources in separate functions.

 [ bp: Add newlines between code blocks for better readability. ]

Signed-off-by: Xiaochen Shen <xiaochen.shen@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: pei.p.jia@intel.com
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/1555499329-1170-3-git-send-email-xiaochen.shen@intel.com
2019-04-18 00:06:31 +02:00
..
core.c
ctrlmondata.c x86/resctrl: Initialize a new resource group with default MBA values 2019-04-18 00:06:31 +02:00
internal.h kernfs, sysfs, cgroup, intel_rdt: Support fs_context 2019-02-28 03:29:34 -05:00
Makefile x86/resctrl: Avoid confusion over the new X86_RESCTRL config 2019-02-02 10:34:52 +01:00
monitor.c x86/resctrl: Remove unused variable 2019-03-24 22:09:27 +01:00
pseudo_lock_event.h
pseudo_lock.c x86/resctrl: Remove duplicate MSR_MISC_FEATURE_CONTROL definition 2019-02-05 07:21:56 +01:00
rdtgroup.c x86/resctrl: Initialize a new resource group with default MBA values 2019-04-18 00:06:31 +02:00