From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx157.postini.com [74.125.245.157]) by kanga.kvack.org (Postfix) with SMTP id 6805A6B007D for ; Tue, 20 Nov 2012 03:32:43 -0500 (EST) From: Glauber Costa Subject: [PATCH 2/6] cgroup: implement CFTYPE_NO_PREFIX Date: Tue, 20 Nov 2012 12:32:00 +0400 Message-Id: <1353400324-10897-3-git-send-email-glommer@parallels.com> In-Reply-To: <1353400324-10897-1-git-send-email-glommer@parallels.com> References: <1353400324-10897-1-git-send-email-glommer@parallels.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-kernel@vger.kernel.org Cc: cgroups@vger.kernel.org, Peter Zijlstra , Paul Turner , Balbir Singh , Tejun Heo , linux-mm@kvack.org, Peter Zijlstra , Glauber Costa From: Tejun Heo When cgroup files are created, cgroup core automatically prepends the name of the subsystem as prefix. This patch adds CFTYPE_NO_PREFIX which disables the automatic prefix. This will be used to deprecate cpuacct which will make cpu create and serve the cpuacct files. Signed-off-by: Tejun Heo Cc: Peter Zijlstra Cc: Glauber Costa --- include/linux/cgroup.h | 1 + kernel/cgroup.c | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index a178a91..018468b 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -272,6 +272,7 @@ struct cgroup_map_cb { /* cftype->flags */ #define CFTYPE_ONLY_ON_ROOT (1U << 0) /* only create on root cg */ #define CFTYPE_NOT_ON_ROOT (1U << 1) /* don't create onp root cg */ +#define CFTYPE_NO_PREFIX (1U << 2) /* skip subsys prefix */ #define MAX_CFTYPE_NAME 64 diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 3d68aad..4081fee 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -2629,7 +2629,8 @@ static int cgroup_add_file(struct cgroup *cgrp, struct cgroup_subsys *subsys, if ((cft->flags & CFTYPE_ONLY_ON_ROOT) && cgrp->parent) return 0; - if (subsys && !test_bit(ROOT_NOPREFIX, &cgrp->root->flags)) { + if (subsys && !(cft->flags & CFTYPE_NO_PREFIX) && + !test_bit(ROOT_NOPREFIX, &cgrp->root->flags)) { strcpy(name, subsys->name); strcat(name, "."); } -- 1.7.11.7 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org