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 20/24] task_diag: Only add VMAs for thread_group leader
Date: Mon, 6 Jul 2015 11:47:21 +0300 [thread overview]
Message-ID: <1436172445-6979-21-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>
threads of a process share the same VMAs, so when dumping all threads
for all processes only push vma data for group leader.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Andrey Vagin <avagin@openvz.org>
---
kernel/taskdiag.c | 17 +++++++++++++----
1 file changed, 13 insertions(+), 4 deletions(-)
diff --git a/kernel/taskdiag.c b/kernel/taskdiag.c
index e5a5eed..6549df3 100644
--- a/kernel/taskdiag.c
+++ b/kernel/taskdiag.c
@@ -443,9 +443,10 @@ err:
}
static int task_diag_fill(struct task_struct *tsk, struct sk_buff *skb,
- u64 show_flags, u32 portid, u32 seq,
- struct netlink_callback *cb)
+ struct task_diag_pid *req, u32 portid, u32 seq,
+ struct netlink_callback *cb)
{
+ u64 show_flags = req->show_flags;
void *reply;
int err = 0, i = 0, n = 0;
bool progress = false;
@@ -492,6 +493,13 @@ static int task_diag_fill(struct task_struct *tsk, struct sk_buff *skb,
}
if (show_flags & TASK_DIAG_SHOW_VMA) {
+ /* if the request is to dump all threads of all processes
+ * only show VMAs for group leader.
+ */
+ if (req->dump_strategy == TASK_DIAG_DUMP_ALL_THREAD &&
+ !thread_group_leader(tsk))
+ goto done;
+
if (i >= n)
err = fill_vma(tsk, skb, cb, &progress, show_flags);
if (err)
@@ -499,6 +507,7 @@ static int task_diag_fill(struct task_struct *tsk, struct sk_buff *skb,
i++;
}
+done:
genlmsg_end(skb, reply);
if (cb)
cb->args[2] = 0;
@@ -696,7 +705,7 @@ int taskdiag_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
for (; task; task = iter_next(&iter)) {
if (!ptrace_may_access(task, PTRACE_MODE_READ))
continue;
- rc = task_diag_fill(task, skb, iter.req.show_flags,
+ rc = task_diag_fill(task, skb, &iter.req,
NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, cb);
if (rc < 0) {
if (rc != -EMSGSIZE) {
@@ -755,7 +764,7 @@ int taskdiag_doit(struct sk_buff *skb, struct genl_info *info)
return -EMSGSIZE;
}
- rc = task_diag_fill(tsk, msg, req.show_flags,
+ rc = task_diag_fill(tsk, msg, &req,
info->snd_portid, info->snd_seq, NULL);
if (rc != -EMSGSIZE)
break;
--
2.1.0
next prev parent reply other threads:[~2015-07-06 8:52 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 ` [PATCH 19/24] task_diag: Add option to dump all threads for all tasks Andrey Vagin
2015-07-06 8:47 ` Andrey Vagin [this message]
2015-07-14 17:47 ` [PATCH 20/24] task_diag: Only add VMAs for thread_group leader 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
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