linux-kernel - [PATCH v2 3/7] mm/writeback: commit reason of WB_REASON_FORKER

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Date:	Sun, 16 Jun 2013 09:14:46 +0800
From:	Wanpeng Li <liwanp@...ux.vnet.ibm.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Michal Hocko <mhocko@...e.cz>,
	David Rientjes <rientjes@...gle.com>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Fengguang Wu <fengguang.wu@...el.com>,
	Rik van Riel <riel@...hat.com>,
	Andrew Shewmaker <agshew@...il.com>,
	Jiri Kosina <jkosina@...e.cz>,
	Namjae Jeon <linkinjeon@...il.com>, Jan Kara <jack@...e.cz>,
	Tejun Heo <tj@...nel.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Wanpeng Li <liwanp@...ux.vnet.ibm.com>
Subject: [PATCH v2 3/7] mm/writeback: commit reason of WB_REASON_FORKER_THREAD mismatch name 

After commit 839a8e86("writeback: replace custom worker pool implementation
with unbound workqueue"), there is no bdi forker thread any more. However,
WB_REASON_FORKER_THREAD is still used due to it is somewhat userland visible 
and we won't be exposing exactly the same information with just a different 
name. 

Signed-off-by: Wanpeng Li <liwanp@...ux.vnet.ibm.com>
---
 include/linux/writeback.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index 8b5cec4..cf077a7 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -47,6 +47,11 @@ enum wb_reason {
 	WB_REASON_LAPTOP_TIMER,
 	WB_REASON_FREE_MORE_MEM,
 	WB_REASON_FS_FREE_SPACE,
+/*
+ * There is no bdi forker thread any more and works are done by emergency
+ * worker, however, this is somewhat userland visible and we'll be exposing
+ * exactly the same information, so it has a mismatch name.
+ */
 	WB_REASON_FORKER_THREAD,
 
 	WB_REASON_MAX,
-- 
1.8.1.2

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