linux-kernel - [PATCH] writeback: remove unused macro DIRTY_FULL

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Date:   Fri, 9 Sep 2022 10:57:11 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <axboe@...nel.dk>
CC:     <dhowells@...hat.com>, <vbabka@...e.cz>, <willy@...radead.org>,
        <akpm@...ux-foundation.org>, <zhanglianjie@...ontech.com>,
        <neilb@...e.de>, <jack@...e.cz>, <bvanassche@....org>,
        <linux-kernel@...r.kernel.org>, <linmiaohe@...wei.com>
Subject: [PATCH] writeback: remove unused macro DIRTY_FULL_SCOPE

It's introduced but never used. Remove it.

Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
---
 include/linux/writeback.h | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index 3f045f6d6c4f..06f9291b6fd5 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -17,20 +17,12 @@ struct bio;
 DECLARE_PER_CPU(int, dirty_throttle_leaks);
 
 /*
- * The 1/4 region under the global dirty thresh is for smooth dirty throttling:
- *
- *	(thresh - thresh/DIRTY_FULL_SCOPE, thresh)
- *
- * Further beyond, all dirtier tasks will enter a loop waiting (possibly long
- * time) for the dirty pages to drop, unless written enough pages.
- *
  * The global dirty threshold is normally equal to the global dirty limit,
  * except when the system suddenly allocates a lot of anonymous memory and
  * knocks down the global dirty threshold quickly, in which case the global
  * dirty limit will follow down slowly to prevent livelocking all dirtier tasks.
  */
 #define DIRTY_SCOPE		8
-#define DIRTY_FULL_SCOPE	(DIRTY_SCOPE / 2)
 
 struct backing_dev_info;
 
-- 
2.23.0