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From: "J. Bruce Fields" <bfields@redhat.com>
To: linux-nfs@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	Trond Myklebust <trondmy@hammerspace.com>,
	Jeff Layton <jlayton@redhat.com>,
	David Howells <dhowells@redhat.com>, Tejun Heo <tj@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>, Shaohua Li <shli@fb.com>,
	Oleg Nesterov <oleg@redhat.com>,
	"J. Bruce Fields" <bfields@redhat.com>
Subject: [PATCH 2/7] kthreads: Simplify tsk_fork_get_node
Date: Fri,  8 Feb 2019 15:10:42 -0500
Message-ID: <1549656647-25115-3-git-send-email-bfields@redhat.com> (raw)
In-Reply-To: <1549656647-25115-1-git-send-email-bfields@redhat.com>

From: "J. Bruce Fields" <bfields@redhat.com>

This will also simplify a following patch that allows multiple
kthreadd's.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
---
 init/init_task.c | 3 +++
 kernel/fork.c    | 4 ++++
 kernel/kthread.c | 3 +--
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/init/init_task.c b/init/init_task.c
index 5aebe3be4d7c..47e4829ec53f 100644
--- a/init/init_task.c
+++ b/init/init_task.c
@@ -153,6 +153,9 @@ struct task_struct init_task
 	.vtime.starttime = 0,
 	.vtime.state	= VTIME_SYS,
 #endif
+#ifdef CONFIG_NUMA
+	.pref_node_fork = NUMA_NO_NODE,
+#endif
 #ifdef CONFIG_NUMA_BALANCING
 	.numa_preferred_nid = -1,
 	.numa_group	= NULL,
diff --git a/kernel/fork.c b/kernel/fork.c
index b69248e6f0e0..c5b5629de2a9 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -912,6 +912,10 @@ static struct task_struct *dup_task_struct(struct task_struct *orig, int node)
 	tsk->fail_nth = 0;
 #endif
 
+#ifdef CONFIG_NUMA
+	tsk->pref_node_fork = NUMA_NO_NODE;
+#endif
+
 #ifdef CONFIG_BLK_CGROUP
 	tsk->throttle_queue = NULL;
 	tsk->use_memdelay = 0;
diff --git a/kernel/kthread.c b/kernel/kthread.c
index 672f0bbf4d89..4428fd586cd8 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -252,8 +252,7 @@ static int kthread(void *_create)
 int tsk_fork_get_node(struct task_struct *tsk)
 {
 #ifdef CONFIG_NUMA
-	if (tsk == kthreadd_task)
-		return tsk->pref_node_fork;
+	return tsk->pref_node_fork;
 #endif
 	return NUMA_NO_NODE;
 }
-- 
2.20.1


  parent reply index

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-08 20:10 [PATCH 0/7] Eliminate delegation self-conflicts J. Bruce Fields
2019-02-08 20:10 ` [PATCH 1/7] kthreads: minor kthreadd refactoring J. Bruce Fields
2019-02-08 20:10 ` J. Bruce Fields [this message]
2019-02-08 20:10 ` [PATCH 3/7] kthreads: allow multiple kthreadd's J. Bruce Fields
2019-03-12 20:01   ` bfields
2019-02-08 20:10 ` [PATCH 4/7] kthreads: allow cloning threads with different flags J. Bruce Fields
2019-02-08 20:10 ` [PATCH 5/7] rpc: separate out body of svc_start_kthreads J. Bruce Fields
2019-02-08 20:10 ` [PATCH 6/7] rpc: move rpc server threads into their own thread group J. Bruce Fields
2019-02-08 20:10 ` [PATCH 7/7] nfsd: ignore delegation self-conflicts J. Bruce Fields
2019-02-09 12:43 ` [PATCH 0/7] Eliminate " Jeff Layton
2019-02-11 15:58   ` J. Bruce Fields
2019-02-15 16:35     ` bfields

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