From: Thomas Gleixner <tglx@linutronix.de>
To: Fenghua Yu <fenghua.yu@intel.com>
Cc: "H. Peter Anvin" <h.peter.anvin@intel.com>,
Ingo Molnar <mingo@elte.hu>, Tony Luck <tony.luck@intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Stephane Eranian <eranian@google.com>,
Borislav Petkov <bp@suse.de>, Dave Hansen <dave.hansen@intel.com>,
Nilay Vaish <nilayvaish@gmail.com>, Shaohua Li <shli@fb.com>,
David Carrillo-Cisneros <davidcc@google.com>,
Ravi V Shankar <ravi.v.shankar@intel.com>,
Sai Prakhya <sai.praneeth.prakhya@intel.com>,
Vikas Shivappa <vikas.shivappa@linux.intel.com>,
linux-kernel <linux-kernel@vger.kernel.org>, x86 <x86@kernel.org>
Subject: Re: [PATCH v5 15/18] x86/intel_rdt: Add tasks files
Date: Wed, 26 Oct 2016 17:27:39 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.20.1610261706420.4983@nanos> (raw)
In-Reply-To: <1477142405-32078-16-git-send-email-fenghua.yu@intel.com>
On Sat, 22 Oct 2016, Fenghua Yu wrote:
> +static void show_rdt_tasks(struct rdtgroup *r, struct seq_file *s)
> +{
> + struct task_struct *p;
> +
> + rcu_read_lock();
> + for_each_process(p) {
So this is restricted to processes, but with the write function I can put a
single thread into a group ...
for_each_process_thread() is what you want.
> static int rdt_num_closid_show(struct kernfs_open_file *of,
> @@ -594,6 +758,13 @@ static void rdt_reset_pqr_assoc_closid(void *v)
> static void rmdir_all_sub(void)
> {
> struct rdtgroup *rdtgrp, *tmp;
> + struct task_struct *p;
> +
> + /* move all tasks to default resource group */
> + read_lock(&tasklist_lock);
> + for_each_process(p)
> + p->closid = 0;
Same issue as above ....
> + read_unlock(&tasklist_lock);
>
> get_cpu();
> /* Reset PQR_ASSOC MSR on this cpu. */
> @@ -723,6 +894,7 @@ static int rdtgroup_rmdir(struct kernfs_node *kn)
> {
> struct rdtgroup *rdtgrp;
> int cpu, ret = 0;
> + struct task_struct *p;
>
> rdtgrp = rdtgroup_kn_lock_live(kn);
> if (!rdtgrp) {
> @@ -730,6 +902,14 @@ static int rdtgroup_rmdir(struct kernfs_node *kn)
> return -ENOENT;
> }
>
> + /* Give any tasks back to the default group */
> + read_lock(&tasklist_lock);
> + for_each_process(p) {
> + if (p->closid == rdtgrp->closid)
> + p->closid = 0;
Once more.
> + }
> + read_unlock(&tasklist_lock);
> +
Thanks,
tglx
next prev parent reply other threads:[~2016-10-26 15:30 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-22 13:19 [PATCH v5 00/18] Intel Cache Allocation Technology Fenghua Yu
2016-10-22 13:19 ` [PATCH v5 01/18] Documentation, ABI: Add a document entry for cache id Fenghua Yu
2016-10-26 21:25 ` [tip:x86/cache] Documentation, ABI: Document the new sysfs files for cpu cache ids tip-bot for Tony Luck
2016-10-22 13:19 ` [PATCH v5 02/18] cacheinfo: Introduce cache id Fenghua Yu
2016-10-26 21:25 ` [tip:x86/cache] " tip-bot for Fenghua Yu
2016-10-22 13:19 ` [PATCH v5 03/18] x86/intel_cacheinfo: Enable cache id in cache info Fenghua Yu
2016-10-26 21:26 ` [tip:x86/cache] " tip-bot for Fenghua Yu
2016-10-22 13:19 ` [PATCH v5 04/18] x86/intel_rdt: Feature discovery Fenghua Yu
2016-10-26 14:15 ` Borislav Petkov
2016-10-26 14:28 ` Thomas Gleixner
2016-10-26 21:26 ` [tip:x86/cache] x86/cpufeature: Add RDT CPUID feature bits tip-bot for Fenghua Yu
2016-10-22 13:19 ` [PATCH v5 05/18] Documentation, x86: Documentation for Intel resource allocation user interface Fenghua Yu
2016-10-22 13:19 ` [PATCH v5 06/18] x86/intel_rdt: Add CONFIG, Makefile, and basic initialization Fenghua Yu
2016-10-26 20:43 ` Thomas Gleixner
2016-10-26 21:27 ` [tip:x86/cache] " tip-bot for Fenghua Yu
2016-10-22 13:19 ` [PATCH v5 07/18] x86/intel_rdt: Add Haswell feature discovery Fenghua Yu
2016-10-26 21:27 ` [tip:x86/cache] " tip-bot for Fenghua Yu
2016-10-22 13:19 ` [PATCH v5 08/18] x86/intel_rdt: Pick up L3/L2 RDT parameters from CPUID Fenghua Yu
2016-10-26 21:28 ` [tip:x86/cache] " tip-bot for Fenghua Yu
2016-10-22 13:19 ` [PATCH v5 09/18] x86/cqm: Move PQR_ASSOC management code into generic code used by both CQM and CAT Fenghua Yu
2016-10-26 21:29 ` [tip:x86/cache] x86/cqm: Share PQR_ASSOC related data between " tip-bot for Fenghua Yu
2016-10-22 13:19 ` [PATCH v5 10/18] x86/intel_rdt: Build structures for each resource based on cache topology Fenghua Yu
2016-10-26 13:02 ` Thomas Gleixner
2016-10-26 16:06 ` Luck, Tony
2016-10-26 17:31 ` Thomas Gleixner
2016-10-26 21:14 ` Fenghua Yu
2016-10-26 21:18 ` Thomas Gleixner
2016-10-22 13:19 ` [PATCH v5 11/18] x86/intel_rdt: Add basic resctrl filesystem support Fenghua Yu
2016-10-26 13:52 ` Thomas Gleixner
2016-10-22 13:19 ` [PATCH v5 12/18] x86/intel_rdt: Add "info" files to resctrl file system Fenghua Yu
2016-10-26 14:45 ` Thomas Gleixner
2016-10-26 15:48 ` Luck, Tony
2016-10-26 17:33 ` Thomas Gleixner
2016-10-27 18:17 ` Fenghua Yu
2016-10-27 18:25 ` Thomas Gleixner
2016-10-27 18:35 ` Fenghua Yu
2016-10-22 13:20 ` [PATCH v5 13/18] x86/intel_rdt: Add mkdir " Fenghua Yu
2016-10-26 15:01 ` Thomas Gleixner
2016-10-28 17:51 ` Fenghua Yu
2016-10-28 18:41 ` Thomas Gleixner
2016-10-22 13:20 ` [PATCH v5 14/18] x86/intel_rdt: Add cpus file Fenghua Yu
2016-10-26 17:57 ` Thomas Gleixner
2016-10-22 13:20 ` [PATCH v5 15/18] x86/intel_rdt: Add tasks files Fenghua Yu
2016-10-26 15:27 ` Thomas Gleixner [this message]
2016-10-22 13:20 ` [PATCH v5 16/18] x86/intel_rdt: Add schemata file Fenghua Yu
2016-10-22 13:20 ` [PATCH v5 17/18] x86/intel_rdt: Add scheduler hook Fenghua Yu
2016-10-22 13:20 ` [PATCH v5 18/18] MAINTAINERS: Add maintainer for Intel RDT resource allocation Fenghua Yu
2016-10-26 21:39 ` [PATCH v5 00/18] Intel Cache Allocation Technology Thomas Gleixner
2016-10-26 21:54 ` Fenghua Yu
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