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authorPaul Menage <menage@google.com>2007-10-19 02:39:36 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-19 14:53:36 -0400
commit817929ec274bcfe771586d338bb31d1659615686 (patch)
tree5a96ed1afd308016e8720437a00bf2f114e907cb /kernel/fork.c
parenta424316ca154317367c7ddf89997d1c80e4a8051 (diff)
Task Control Groups: shared cgroup subsystem group arrays
Replace the struct css_set embedded in task_struct with a pointer; all tasks that have the same set of memberships across all hierarchies will share a css_set object, and will be linked via their css_sets field to the "tasks" list_head in the css_set. Assuming that many tasks share the same cgroup assignments, this reduces overall space usage and keeps the size of the task_struct down (three pointers added to task_struct compared to a non-cgroups kernel, no matter how many subsystems are registered). [akpm@linux-foundation.org: fix a printk] [akpm@linux-foundation.org: build fix] Signed-off-by: Paul Menage <menage@google.com> Cc: Serge E. Hallyn <serue@us.ibm.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Dave Hansen <haveblue@us.ibm.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Paul Jackson <pj@sgi.com> Cc: Kirill Korotaev <dev@openvz.org> Cc: Herbert Poetzl <herbert@13thfloor.at> Cc: Srivatsa Vaddagiri <vatsa@in.ibm.com> Cc: Cedric Le Goater <clg@fr.ibm.com> Cc: Serge E. Hallyn <serue@us.ibm.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Dave Hansen <haveblue@us.ibm.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Paul Jackson <pj@sgi.com> Cc: Kirill Korotaev <dev@openvz.org> Cc: Herbert Poetzl <herbert@13thfloor.at> Cc: Srivatsa Vaddagiri <vatsa@in.ibm.com> Cc: Cedric Le Goater <clg@fr.ibm.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/fork.c')
-rw-r--r--kernel/fork.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index e7c181454dca..fcac38929245 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1301,6 +1301,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
1301 spin_unlock(&current->sighand->siglock); 1301 spin_unlock(&current->sighand->siglock);
1302 write_unlock_irq(&tasklist_lock); 1302 write_unlock_irq(&tasklist_lock);
1303 proc_fork_connector(p); 1303 proc_fork_connector(p);
1304 cgroup_post_fork(p);
1304 return p; 1305 return p;
1305 1306
1306bad_fork_cleanup_namespaces: 1307bad_fork_cleanup_namespaces: