LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Balbir Singh <balbir@linux.vnet.ibm.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Paul Menage <menage@google.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Linux Containers <containers@lists.osdl.org>,
	YAMAMOTO Takashi <yamamoto@valinux.co.jp>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Eric W Biederman <ebiederm@xmission.com>,
	Linux MM Mailing List <linux-mm@kvack.org>,
	Nick Piggin <npiggin@suse.de>,
	Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>,
	Pavel Emelianov <xemul@openvz.org>,
	Dhaval Giani <dhaval@linux.vnet.ibm.com>,
	Balbir Singh <balbir@linux.vnet.ibm.com>,
	Dave Hansen <haveblue@us.ibm.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Subject: [-mm PATCH 5/10] Memory controller task migration (v7)
Date: Fri, 24 Aug 2007 20:50:43 +0530	[thread overview]
Message-ID: <20070824152043.16582.37727.sendpatchset@balbir-laptop> (raw)
In-Reply-To: <20070824151948.16582.34424.sendpatchset@balbir-laptop>


Allow tasks to migrate from one container to the other. We migrate
mm_struct's mem_container only when the thread group id migrates.


Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
---

 mm/memcontrol.c |   35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff -puN mm/memcontrol.c~mem-control-task-migration mm/memcontrol.c
--- linux-2.6.23-rc2-mm2/mm/memcontrol.c~mem-control-task-migration	2007-08-24 20:46:07.000000000 +0530
+++ linux-2.6.23-rc2-mm2-balbir/mm/memcontrol.c	2007-08-24 20:46:07.000000000 +0530
@@ -326,11 +326,46 @@ static int mem_container_populate(struct
 					ARRAY_SIZE(mem_container_files));
 }
 
+static void mem_container_move_task(struct container_subsys *ss,
+				struct container *cont,
+				struct container *old_cont,
+				struct task_struct *p)
+{
+	struct mm_struct *mm;
+	struct mem_container *mem, *old_mem;
+
+	mm = get_task_mm(p);
+	if (mm == NULL)
+		return;
+
+	mem = mem_container_from_cont(cont);
+	old_mem = mem_container_from_cont(old_cont);
+
+	if (mem == old_mem)
+		goto out;
+
+	/*
+	 * Only thread group leaders are allowed to migrate, the mm_struct is
+	 * in effect owned by the leader
+	 */
+	if (p->tgid != p->pid)
+		goto out;
+
+	css_get(&mem->css);
+	rcu_assign_pointer(mm->mem_container, mem);
+	css_put(&old_mem->css);
+
+out:
+	mmput(mm);
+	return;
+}
+
 struct container_subsys mem_container_subsys = {
 	.name = "memory",
 	.subsys_id = mem_container_subsys_id,
 	.create = mem_container_create,
 	.destroy = mem_container_destroy,
 	.populate = mem_container_populate,
+	.attach = mem_container_move_task,
 	.early_init = 1,
 };
_

-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL

  parent reply	other threads:[~2007-08-24 15:22 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-08-24 15:19 [-mm PATCH 0/10] Memory controller introduction (v7) Balbir Singh
2007-08-24 15:19 ` [-mm PATCH 1/10] Memory controller resource counters (v7) Balbir Singh
2007-08-24 15:20 ` [-mm PATCH 2/10] Memory controller containers setup (v7) Balbir Singh
2007-08-24 15:20 ` [-mm PATCH 3/10] Memory controller accounting " Balbir Singh
2007-08-24 15:20 ` [-mm PATCH 4/10] Memory controller memory accounting (v7) Balbir Singh
2007-08-24 15:20 ` Balbir Singh [this message]
2007-08-27  8:26   ` [-mm PATCH 5/10] Memory controller task migration (v7) YAMAMOTO Takashi
2007-08-27 10:39     ` Balbir Singh
2007-08-28  8:32       ` YAMAMOTO Takashi
2007-08-28 20:04         ` Paul Menage
2007-08-24 15:20 ` [-mm PATCH 6/10] Memory controller add per container LRU and reclaim (v7) Balbir Singh
2007-08-24 15:21 ` [-mm PATCH 7/10] Memory controller OOM handling (v7) Balbir Singh
2007-08-24 15:21 ` [-mm PATCH 8/10] Memory controller add switch to control what type of pages to limit (v7) Balbir Singh
2007-08-24 15:21 ` [-mm PATCH 9/10] Memory controller make page_referenced() container aware (v7) Balbir Singh
2007-08-24 15:21 ` [-mm PATCH 10/10] Memory controller add documentation Balbir Singh

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=20070824152043.16582.37727.sendpatchset@balbir-laptop \
    --to=balbir@linux.vnet.ibm.com \
    --cc=a.p.zijlstra@chello.nl \
    --cc=akpm@linux-foundation.org \
    --cc=containers@lists.osdl.org \
    --cc=dhaval@linux.vnet.ibm.com \
    --cc=ebiederm@xmission.com \
    --cc=haveblue@us.ibm.com \
    --cc=kamezawa.hiroyu@jp.fujitsu.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=menage@google.com \
    --cc=npiggin@suse.de \
    --cc=svaidy@linux.vnet.ibm.com \
    --cc=xemul@openvz.org \
    --cc=yamamoto@valinux.co.jp \
    --subject='Re: [-mm PATCH 5/10] Memory controller task migration (v7)' \
    /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

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).