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Groups > linux.kernel > #1478853
| From | "Fenghua Yu" <fenghua.yu@intel.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v2 26/33] Task fork and exit for rdtgroup |
| Date | 2016-09-08 09:10 +0200 |
| Message-ID | <sf1Dd-2F3-69@gated-at.bofh.it> (permalink) |
| References | <sf1tv-2mB-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Fenghua Yu <fenghua.yu@intel.com>
When a task is forked, it inherites its parent rdtgroup. The task
can be moved to other rdtgroup during its run time.
When the task exits, it's deleted from it's current rdtgroup's task
list.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
---
arch/x86/kernel/cpu/intel_rdt_rdtgroup.c | 22 ++++++++++++++++++++++
kernel/exit.c | 2 ++
kernel/fork.c | 2 ++
3 files changed, 26 insertions(+)
diff --git a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
index 7842194..acea62c 100644
--- a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
+++ b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
@@ -956,3 +956,25 @@ int __init rdtgroup_init(void)
return 0;
}
+
+void rdtgroup_fork(struct task_struct *child)
+{
+ struct rdtgroup *rdtgrp;
+
+ INIT_LIST_HEAD(&child->rg_list);
+ if (!rdtgroup_mounted)
+ return;
+
+ mutex_lock(&rdtgroup_mutex);
+
+ rdtgrp = current->rdtgroup;
+ if (!rdtgrp)
+ goto out;
+
+ list_add_tail(&child->rg_list, &rdtgrp->pset.tasks);
+ child->rdtgroup = rdtgrp;
+ atomic_inc(&rdtgrp->refcount);
+
+out:
+ mutex_unlock(&rdtgroup_mutex);
+}
diff --git a/kernel/exit.c b/kernel/exit.c
index 091a78b..270ede6 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -54,6 +54,7 @@
#include <linux/writeback.h>
#include <linux/shm.h>
#include <linux/kcov.h>
+#include <linux/resctrl.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>
@@ -837,6 +838,7 @@ void do_exit(long code)
perf_event_exit_task(tsk);
cgroup_exit(tsk);
+ rdtgroup_exit(tsk);
/*
* FIXME: do that only when needed, using sched_exit tracepoint
diff --git a/kernel/fork.c b/kernel/fork.c
index beb3172..79bfc99 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -76,6 +76,7 @@
#include <linux/compiler.h>
#include <linux/sysctl.h>
#include <linux/kcov.h>
+#include <linux/resctrl.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
@@ -1426,6 +1427,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
p->io_context = NULL;
p->audit_context = NULL;
cgroup_fork(p);
+ rdtgroup_fork(p);
#ifdef CONFIG_NUMA
p->mempolicy = mpol_dup(p->mempolicy);
if (IS_ERR(p->mempolicy)) {
--
2.5.0
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[PATCH v2 00/33] Enable Intel Resource Allocation in Resource Director Technology "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:00 +0200
[PATCH v2 32/33] MAINTAINERS: Add maintainer for Intel RDT resource allocation "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:00 +0200
[PATCH v2 30/33] x86/intel_rdt_rdtgroup.c: Process schemata input from resctrl interface "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:00 +0200
Re: [PATCH v2 30/33] x86/intel_rdt_rdtgroup.c: Process schemata input from resctrl interface Thomas Gleixner <tglx@linutronix.de> - 2016-09-09 00:30 +0200
[PATCH v2 31/33] Documentation/kernel-parameters: Add kernel parameter "resctrl" for CAT "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:00 +0200
Re: [PATCH v2 31/33] Documentation/kernel-parameters: Add kernel parameter "resctrl" for CAT Thomas Gleixner <tglx@linutronix.de> - 2016-09-09 00:30 +0200
[PATCH v2 28/33] x86/intel_rdt_rdtgroup.c: Read and write cpus "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 28/33] x86/intel_rdt_rdtgroup.c: Read and write cpus Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 22:30 +0200
[PATCH v2 24/33] x86/intel_rdt_rdtgroup.c: Create info directory "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 24/33] x86/intel_rdt_rdtgroup.c: Create info directory Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 18:10 +0200
[PATCH v2 11/33] x86/intel_rdt: Hot cpu support for Cache Allocation "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 11/33] x86/intel_rdt: Hot cpu support for Cache Allocation Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 12:10 +0200
[PATCH v2 13/33] Define CONFIG_INTEL_RDT "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 13/33] Define CONFIG_INTEL_RDT Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 12:20 +0200
[PATCH v2 08/33] x86/intel_rdt: Add Class of service management "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 08/33] x86/intel_rdt: Add Class of service management Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 11:00 +0200
[PATCH v2 22/33] x86/intel_rdt.c: Extend RDT to per cache and per resources "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 22/33] x86/intel_rdt.c: Extend RDT to per cache and per resources Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 17:10 +0200
[PATCH v2 20/33] x86/intel_rdt.h: Header for inter_rdt.c "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 20/33] x86/intel_rdt.h: Header for inter_rdt.c Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 14:40 +0200
[PATCH v2 10/33] x86/intel_rdt: Implement scheduling support for Intel RDT "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 10/33] x86/intel_rdt: Implement scheduling support for Intel RDT Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 12:00 +0200
[PATCH v2 16/33] x86/intel_rdt: Class of service and capacity bitmask management for CDP "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 16/33] x86/intel_rdt: Class of service and capacity bitmask management for CDP Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 12:40 +0200
[PATCH v2 04/33] drivers/base/cacheinfo.c: Export some cacheinfo functions for others to use "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 04/33] drivers/base/cacheinfo.c: Export some cacheinfo functions for others to use Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 10:30 +0200
[PATCH v2 25/33] include/linux/resctrl.h: Define fork and exit functions in a new header file "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 25/33] include/linux/resctrl.h: Define fork and exit functions in a new header file Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 18:20 +0200
[PATCH v2 27/33] x86/intel_rdt_rdtgroup.c: Implement resctrl file system commands "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 27/33] x86/intel_rdt_rdtgroup.c: Implement resctrl file system commands Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 22:20 +0200
Re: [PATCH v2 27/33] x86/intel_rdt_rdtgroup.c: Implement resctrl file system commands Fenghua Yu <fenghua.yu@intel.com> - 2016-09-09 00:30 +0200
[PATCH v2 29/33] x86/intel_rdt_rdtgroup.c: Tasks iterator and write "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 29/33] x86/intel_rdt_rdtgroup.c: Tasks iterator and write Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 23:00 +0200
[PATCH v2 17/33] x86/intel_rdt: Hot cpu update for code data prioritization "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 17/33] x86/intel_rdt: Hot cpu update for code data prioritization Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 12:40 +0200
[PATCH v2 06/33] Documentation, x86: Documentation for Intel resource allocation user interface "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 06/33] Documentation, x86: Documentation for Intel resource allocation user interface Borislav Petkov <bp@suse.de> - 2016-09-08 13:30 +0200
Re: [PATCH v2 06/33] Documentation, x86: Documentation for Intel resource allocation user interface Fenghua Yu <fenghua.yu@intel.com> - 2016-09-09 00:20 +0200
Re: [PATCH v2 06/33] Documentation, x86: Documentation for Intel resource allocation user interface Fenghua Yu <fenghua.yu@intel.com> - 2016-09-09 06:30 +0200
[PATCH v2 03/33] x86, intel_cacheinfo: Enable cache id in x86 "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
[PATCH v2 09/33] x86/intel_rdt: Add L3 cache capacity bitmask management "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 09/33] x86/intel_rdt: Add L3 cache capacity bitmask management Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 11:50 +0200
[PATCH v2 07/33] x86/intel_rdt: Add support for Cache Allocation detection "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 07/33] x86/intel_rdt: Add support for Cache Allocation detection Borislav Petkov <bp@suse.de> - 2016-09-08 14:00 +0200
RE: [PATCH v2 07/33] x86/intel_rdt: Add support for Cache Allocation detection "Yu, Fenghua" <fenghua.yu@intel.com> - 2016-09-08 19:00 +0200
Re: [PATCH v2 07/33] x86/intel_rdt: Add support for Cache Allocation detection Borislav Petkov <bp@suse.de> - 2016-09-08 19:20 +0200
Re: [PATCH v2 07/33] x86/intel_rdt: Add support for Cache Allocation detection Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 15:20 +0200
RE: [PATCH v2 07/33] x86/intel_rdt: Add support for Cache Allocation detection "Yu, Fenghua" <fenghua.yu@intel.com> - 2016-09-08 16:00 +0200
[PATCH v2 01/33] cacheinfo: Introduce cache id "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
[PATCH v2 05/33] x86/intel_rdt: Cache Allocation documentation "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
[PATCH v2 19/33] magic number for resctrl file system "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 19/33] magic number for resctrl file system Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 12:50 +0200
Re: [PATCH v2 19/33] magic number for resctrl file system Borislav Petkov <bp@alien8.de> - 2016-09-08 12:50 +0200
[PATCH v2 21/33] x86/intel_rdt_rdtgroup.h: Header for user interface "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 21/33] x86/intel_rdt_rdtgroup.h: Header for user interface Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 14:50 +0200
[PATCH v2 26/33] Task fork and exit for rdtgroup "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 26/33] Task fork and exit for rdtgroup Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 21:50 +0200
[PATCH v2 18/33] sched.h: Add rg_list and rdtgroup in task_struct "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 18/33] sched.h: Add rg_list and rdtgroup in task_struct Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 12:40 +0200
[PATCH v2 02/33] Documentation, ABI: Add a document entry for cache id "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 02/33] Documentation, ABI: Add a document entry for cache id Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 21:40 +0200
[PATCH v2 12/33] x86/intel_rdt: Intel haswell Cache Allocation enumeration "Fenghua Yu" <fenghua.yu@intel.com> - 2016-09-08 09:10 +0200
Re: [PATCH v2 12/33] x86/intel_rdt: Intel haswell Cache Allocation enumeration Thomas Gleixner <tglx@linutronix.de> - 2016-09-08 12:20 +0200
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