linux-kernel - [PATCH] mm/readahead.c: fix incorrect comments for get_init_ra

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Message-Id: <20211019104812.135602-1-linf@wangsu.com>
Date:   Tue, 19 Oct 2021 18:48:12 +0800
From:   Lin Feng <linf@...gsu.com>
To:     akpm@...ux-foundation.org
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org, linf@...gsu.com
Subject: [PATCH] mm/readahead.c: fix incorrect comments for get_init_ra_size

In fact, formated values returned by get_init_ra_size are not that
intuitive. This patch make the comments reflect its truth.

Signed-off-by: Lin Feng <linf@...gsu.com>
---
 mm/readahead.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/readahead.c b/mm/readahead.c
index 41b75d76d36e..88a84f254ed6 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -309,7 +309,7 @@ void force_page_cache_ra(struct readahead_control *ractl,
  * Set the initial window size, round to next power of 2 and square
  * for small size, x 4 for medium, and x 2 for large
  * for 128k (32 page) max ra
- * 1-8 page = 32k initial, > 8 page = 128k initial
+ * 1-2 page = 16k, 3-4 page 32k, 5-8 page = 64k, > 8 page = 128k initial
  */
 static unsigned long get_init_ra_size(unsigned long size, unsigned long max)
 {
-- 
2.31.1