From: Andrey Vagin <avagin@openvz.org>
To: linux-kernel@vger.kernel.org
Cc: linux-api@vger.kernel.org, Andrey Vagin <avagin@openvz.org>,
Oleg Nesterov <oleg@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Cyrill Gorcunov <gorcunov@openvz.org>,
Pavel Emelyanov <xemul@parallels.com>,
Roger Luethi <rl@hellgate.ch>, Arnd Bergmann <arnd@arndb.de>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
David Ahern <dsahern@gmail.com>,
Andy Lutomirski <luto@amacapital.net>,
Pavel Odintsov <pavel.odintsov@gmail.com>
Subject: [PATCH 19/24] task_diag: Add option to dump all threads for all tasks
Date: Mon, 6 Jul 2015 11:47:20 +0300 [thread overview]
Message-ID: <1436172445-6979-20-git-send-email-avagin@openvz.org> (raw)
In-Reply-To: <1436172445-6979-1-git-send-email-avagin@openvz.org>
From: David Ahern <dsahern@gmail.com>
New dump strategy to walk all threads of all processes.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Andrey Vagin <avagin@openvz.org>
---
include/uapi/linux/task_diag.h | 7 +++---
kernel/taskdiag.c | 55 ++++++++++++++++++++++++++++++++++++------
2 files changed, 52 insertions(+), 10 deletions(-)
diff --git a/include/uapi/linux/task_diag.h b/include/uapi/linux/task_diag.h
index 4a1cecb..19c9579 100644
--- a/include/uapi/linux/task_diag.h
+++ b/include/uapi/linux/task_diag.h
@@ -149,9 +149,10 @@ static inline struct task_diag_vma_stat *task_diag_vma_stat(struct task_diag_vma
vma = (void *) vma + vma->vma_len)
#define TASK_DIAG_DUMP_ALL 0
-#define TASK_DIAG_DUMP_CHILDREN 1
-#define TASK_DIAG_DUMP_THREAD 2
-#define TASK_DIAG_DUMP_ONE 3
+#define TASK_DIAG_DUMP_ALL_THREAD 1
+#define TASK_DIAG_DUMP_CHILDREN 2
+#define TASK_DIAG_DUMP_THREAD 3
+#define TASK_DIAG_DUMP_ONE 4
struct task_diag_pid {
__u64 show_flags;
diff --git a/kernel/taskdiag.c b/kernel/taskdiag.c
index 20494ee..e5a5eed 100644
--- a/kernel/taskdiag.c
+++ b/kernel/taskdiag.c
@@ -521,13 +521,9 @@ struct task_iter {
struct netlink_callback *cb;
struct task_struct *parent;
- union {
- struct tgid_iter tgid;
- struct {
- unsigned int pos;
- struct task_struct *task;
- };
- };
+ struct tgid_iter tgid;
+ unsigned int pos;
+ struct task_struct *task;
};
static void iter_stop(struct task_iter *iter)
@@ -541,6 +537,12 @@ static void iter_stop(struct task_iter *iter)
case TASK_DIAG_DUMP_ALL:
task = iter->tgid.task;
break;
+ case TASK_DIAG_DUMP_ALL_THREAD:
+ /* release both tgid task and thread task */
+ if (iter->task)
+ put_task_struct(iter->task);
+ task = iter->tgid.task;
+ break;
default:
task = iter->task;
}
@@ -590,6 +592,25 @@ static struct task_struct *iter_start(struct task_iter *iter)
iter->tgid.task = NULL;
iter->tgid = next_tgid(iter->ns, iter->tgid);
return iter->tgid.task;
+
+ case TASK_DIAG_DUMP_ALL_THREAD:
+ iter->pos = iter->cb->args[1];
+ iter->tgid.tgid = iter->cb->args[0];
+ iter->tgid.task = NULL;
+ iter->tgid = next_tgid(iter->ns, iter->tgid);
+ if (!iter->tgid.task)
+ return NULL;
+
+ iter->task = task_first_tid(iter->tgid.task, 0, iter->pos, iter->ns);
+ if (!iter->task) {
+ iter->pos = 0;
+ iter->tgid.tgid += 1;
+ iter->tgid = next_tgid(iter->ns, iter->tgid);
+ iter->task = iter->tgid.task;
+ if (iter->task)
+ get_task_struct(iter->task);
+ }
+ return iter->task;
}
return ERR_PTR(-EINVAL);
@@ -622,6 +643,24 @@ static struct task_struct *iter_next(struct task_iter *iter)
iter->tgid = next_tgid(iter->ns, iter->tgid);
iter->cb->args[0] = iter->tgid.tgid;
return iter->tgid.task;
+
+ case TASK_DIAG_DUMP_ALL_THREAD:
+ iter->pos++;
+ iter->task = task_next_tid(iter->task);
+ if (!iter->task) {
+ iter->pos = 0;
+ iter->tgid.tgid += 1;
+ iter->tgid = next_tgid(iter->ns, iter->tgid);
+ iter->task = iter->tgid.task;
+ if (iter->task)
+ get_task_struct(iter->task);
+ }
+
+ /* save current position */
+ iter->cb->args[0] = iter->tgid.tgid;
+ iter->cb->args[1] = iter->pos;
+
+ return iter->task;
}
return NULL;
@@ -647,6 +686,8 @@ int taskdiag_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
iter.ns = ns;
iter.cb = cb;
iter.parent = NULL;
+ iter.pos = 0;
+ iter.task = NULL;
task = iter_start(&iter);
if (IS_ERR(task))
--
2.1.0
next prev parent reply other threads:[~2015-07-06 8:51 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-06 8:47 [PATCH 0/24] kernel: add a netlink interface to get information about processes (v2) Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 01/24] kernel: define taststats commands in the one place Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 02/24] kernel: add a netlink interface to get information about tasks (v2) Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 03/24] kernel: make taskstats available from all net namespaces Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 04/24] kernel: move next_tgid from fs/proc Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 05/24] task_diag: add ability to get information about all tasks Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 06/24] task_diag: add ability to split per-task data on a few netlink messages Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 07/24] task_diag: add a new group to get process credentials Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 08/24] proc: pick out a function to iterate task children Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-14 18:02 ` Oleg Nesterov
2015-07-14 18:02 ` Oleg Nesterov
2015-07-17 15:57 ` Andrew Vagin
2015-07-17 15:57 ` Andrew Vagin
2015-07-18 21:22 ` Oleg Nesterov
2015-07-18 21:22 ` Oleg Nesterov
2015-07-06 8:47 ` [PATCH 09/24] proc: move task_next_child() from fs/proc Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 10/24] task_diag: add ability to dump children (v2) Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 11/24] task_diag: add a new group to get task statistics Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 12/24] task_diag: add a new group to get tasks memory mappings (v2) Andrey Vagin
2015-07-14 18:08 ` Oleg Nesterov
2015-07-14 18:08 ` Oleg Nesterov
2015-07-15 2:02 ` David Ahern
2015-07-15 2:02 ` David Ahern
2015-07-06 8:47 ` [PATCH 13/24] task_diag: shows memory consumption for " Andrey Vagin
2015-07-06 8:47 ` [PATCH 14/24] task_diag: add a marcos to enumirate memory mappings Andrey Vagin
2015-07-06 8:47 ` [PATCH 15/24] proc: give task_struct instead of pid into first_tid Andrey Vagin
2015-07-14 18:11 ` Oleg Nesterov
2015-07-06 8:47 ` [PATCH 16/24] proc: move first_tid and next_tid out of proc Andrey Vagin
2015-07-06 8:47 ` [PATCH 17/24] task_diag: add ability to dump theads Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 8:47 ` [PATCH 18/24] task_diag: add ability to handle one task in a continious mode Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin [this message]
2015-07-06 8:47 ` [PATCH 20/24] task_diag: Only add VMAs for thread_group leader Andrey Vagin
2015-07-14 17:47 ` Oleg Nesterov
2015-07-14 17:47 ` Oleg Nesterov
2015-07-15 2:01 ` David Ahern
2015-07-15 13:31 ` Oleg Nesterov
2015-07-15 13:31 ` Oleg Nesterov
2015-07-06 8:47 ` [PATCH 21/24] task diag: Add support for TGID attribute Andrey Vagin
2015-07-06 8:47 ` [PATCH 22/24] Documentation: add documentation for task_diag Andrey Vagin
2015-07-06 8:47 ` [PATCH 23/24] selftest: check the task_diag functinonality Andrey Vagin
2015-07-06 8:47 ` [PATCH 24/24] task_diag: Enhance fork tool to spawn threads Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin
2015-07-06 17:10 ` [PATCH 0/24] kernel: add a netlink interface to get information about processes (v2) Andy Lutomirski
2015-07-07 15:43 ` Andrew Vagin
2015-07-07 15:56 ` Andy Lutomirski
2015-07-07 15:56 ` Andy Lutomirski
2015-07-07 16:17 ` David Ahern
2015-07-07 16:17 ` David Ahern
2015-07-07 16:24 ` Andy Lutomirski
2015-07-07 16:41 ` David Ahern
2015-07-07 16:41 ` David Ahern
2015-07-08 16:10 ` Andrew Vagin
2015-07-08 16:10 ` Andrew Vagin
2015-07-08 17:39 ` Andy Lutomirski
2015-07-08 22:49 ` Andrey Vagin
2015-07-08 23:48 ` Andy Lutomirski
2015-07-08 23:48 ` Andy Lutomirski
2015-07-07 16:25 ` Arnaldo Carvalho de Melo
2015-07-07 16:25 ` Arnaldo Carvalho de Melo
2015-07-07 16:27 ` Andy Lutomirski
2015-07-07 16:27 ` Andy Lutomirski
2015-07-07 16:56 ` David Ahern
2015-07-07 16:56 ` David Ahern
2015-11-24 15:18 ` Andrew Vagin
2015-11-24 15:18 ` Andrew Vagin
2015-12-03 23:20 ` Andy Lutomirski
2015-12-03 23:20 ` Andy Lutomirski
2015-12-03 23:43 ` Arnd Bergmann
2015-12-14 8:05 ` Andrew Vagin
2015-12-14 8:05 ` Andrew Vagin
2015-12-14 7:52 ` Andrew Vagin
2015-12-14 7:52 ` Andrew Vagin
2015-12-14 22:38 ` Andy Lutomirski
2015-12-15 15:53 ` Andrew Vagin
2015-12-15 15:53 ` Andrew Vagin
2015-12-15 16:43 ` Andy Lutomirski
2015-12-15 16:43 ` Andy Lutomirski
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1436172445-6979-20-git-send-email-avagin@openvz.org \
--to=avagin@openvz.org \
--cc=acme@kernel.org \
--cc=akpm@linux-foundation.org \
--cc=arnd@arndb.de \
--cc=dsahern@gmail.com \
--cc=gorcunov@openvz.org \
--cc=linux-api@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=luto@amacapital.net \
--cc=oleg@redhat.com \
--cc=pavel.odintsov@gmail.com \
--cc=rl@hellgate.ch \
--cc=xemul@parallels.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.