From: Marcelo Tosatti <mtosatti@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Nitesh Lal <nilal@redhat.com>,
Nicolas Saenz Julienne <nsaenzju@redhat.com>,
Frederic Weisbecker <frederic@kernel.org>,
Christoph Lameter <cl@linux.com>,
Juri Lelli <juri.lelli@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Alex Belits <abelits@belits.com>, Peter Xu <peterx@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
Daniel Bristot de Oliveira <bristot@redhat.com>,
Oscar Shiang <oscar0225@livemail.tw>
Subject: [patch v11 06/13] procfs: add per-pid task isolation state
Date: Fri, 04 Feb 2022 14:35:43 -0300 [thread overview]
Message-ID: <20220204173554.719102490@fedora.localdomain> (raw)
In-Reply-To: 20220204173537.429902988@fedora.localdomain
Add /proc/pid/task_isolation file, to query the state of
task isolation configuration.
---
fs/proc/base.c | 68 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 68 insertions(+)
Index: linux-2.6/fs/proc/base.c
===================================================================
--- linux-2.6.orig/fs/proc/base.c
+++ linux-2.6/fs/proc/base.c
@@ -97,6 +97,8 @@
#include <linux/time_namespace.h>
#include <linux/resctrl.h>
#include <linux/cn_proc.h>
+#include <linux/prctl.h>
+#include <linux/task_isolation.h>
#include <trace/events/oom.h>
#include "internal.h"
#include "fd.h"
@@ -665,6 +667,69 @@ static int proc_pid_syscall(struct seq_f
}
#endif /* CONFIG_HAVE_ARCH_TRACEHOOK */
+#ifdef CONFIG_TASK_ISOLATION
+
+struct qoptions {
+ unsigned long mask;
+ char *name;
+};
+
+static struct qoptions iopts[] = {
+ {ISOL_F_QUIESCE, "quiesce"},
+};
+#define ILEN (sizeof(iopts) / sizeof(struct qoptions))
+
+static struct qoptions qopts[] = {
+ {ISOL_F_QUIESCE_VMSTATS, "vmstat_sync"},
+};
+#define QLEN (sizeof(qopts) / sizeof(struct qoptions))
+
+static void show_isolation_state(struct seq_file *m,
+ struct qoptions *iopt,
+ int mask,
+ const char *hdr)
+{
+ int i;
+
+ seq_printf(m, hdr);
+ for (i = 0; i < ILEN; i++) {
+ if (mask & iopt->mask)
+ seq_printf(m, "%s ", iopt->name);
+ iopt++;
+ }
+ if (mask == 0)
+ seq_printf(m, "none ");
+ seq_printf(m, "\n");
+}
+
+int proc_pid_task_isolation(struct seq_file *m, struct pid_namespace *ns,
+ struct pid *pid, struct task_struct *t)
+{
+ int active_mask, quiesce_mask, conf_mask;
+ struct task_isol_info *task_isol_info;
+ struct inode *inode = m->private;
+ struct task_struct *task = get_proc_task(inode);
+
+ task_isol_info = t->task_isol_info;
+ if (!task_isol_info)
+ active_mask = quiesce_mask = conf_mask = 0;
+ else {
+ active_mask = task_isol_info->active_mask;
+ quiesce_mask = task_isol_info->quiesce_mask;
+ conf_mask = task_isol_info->conf_mask;
+ }
+
+ show_isolation_state(m, iopts, conf_mask, "Configured state: ");
+ show_isolation_state(m, iopts, active_mask, "Active state: ");
+ show_isolation_state(m, qopts, quiesce_mask, "Quiescing: ");
+
+ put_task_struct(task);
+
+ return 0;
+}
+
+#endif /* CONFIG_TASK_ISOLATION */
+
/************************************************************************/
/* Here the fs part begins */
/************************************************************************/
@@ -3286,6 +3351,9 @@ static const struct pid_entry tgid_base_
#ifdef CONFIG_SECCOMP_CACHE_DEBUG
ONE("seccomp_cache", S_IRUSR, proc_pid_seccomp_cache),
#endif
+#ifdef CONFIG_TASK_ISOLATION
+ ONE("task_isolation", S_IRUSR, proc_pid_task_isolation),
+#endif
};
static int proc_tgid_base_readdir(struct file *file, struct dir_context *ctx)
next prev parent reply other threads:[~2022-02-04 17:37 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-04 17:35 [patch v11 00/13] extensible prctl task isolation interface and vmstat sync Marcelo Tosatti
2022-02-04 17:35 ` [patch v11 01/13] s390: add support for TIF_TASK_ISOL Marcelo Tosatti
2022-02-07 11:40 ` Sven Schnelle
2022-02-04 17:35 ` [patch v11 02/13] x86: " Marcelo Tosatti
2022-02-04 17:35 ` [patch v11 03/13] add basic task isolation prctl interface Marcelo Tosatti
2022-02-04 17:35 ` [patch v11 04/13] add prctl task isolation prctl docs and samples Marcelo Tosatti
2022-02-04 17:35 ` [patch v11 05/13] task isolation: sync vmstats on return to userspace Marcelo Tosatti
2022-02-07 14:57 ` Frederic Weisbecker
2022-02-07 15:16 ` Marcelo Tosatti
2022-02-04 17:35 ` Marcelo Tosatti [this message]
2022-02-04 17:35 ` [patch v11 07/13] task isolation: sync vmstats conditional on changes Marcelo Tosatti
2022-02-07 15:19 ` Frederic Weisbecker
2022-03-10 16:30 ` Marcelo Tosatti
2022-02-07 15:29 ` Frederic Weisbecker
2022-02-04 17:35 ` [patch v11 08/13] task isolation: enable return to userspace processing Marcelo Tosatti
2022-02-04 17:35 ` [patch v11 09/13] task isolation: add preempt notifier to sync per-CPU vmstat dirty info to thread info Marcelo Tosatti
2022-02-07 15:36 ` Frederic Weisbecker
2022-02-04 17:35 ` [patch v11 10/13] KVM: x86: process isolation work from VM-entry code path Marcelo Tosatti
2022-02-07 15:47 ` Frederic Weisbecker
2022-03-10 16:35 ` Marcelo Tosatti
2022-02-04 17:35 ` [patch v11 11/13] mm: vmstat: move need_update Marcelo Tosatti
2022-02-04 17:35 ` [patch v11 12/13] mm: vmstat_refresh: avoid queueing work item if cpu stats are clean Marcelo Tosatti
2022-02-04 17:35 ` [patch v11 13/13] task isolation: only TIF_TASK_ISOL if task isolation is enabled Marcelo Tosatti
2022-02-07 15:38 ` Frederic Weisbecker
2022-02-19 8:02 ` [patch v11 00/13] extensible prctl task isolation interface and vmstat sync Oscar Shiang
2022-02-23 17:31 ` Marcelo Tosatti
2022-03-08 6:32 ` Oscar Shiang
2022-03-08 13:12 ` Marcelo Tosatti
2022-03-09 15:31 ` Oscar Shiang
2022-03-08 7:20 ` Oscar Shiang
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