From 0740e54304dcd11cf2a8edb6764423eb2fed1c61 Mon Sep 17 00:00:00 2001 From: Yafang Shao Date: Wed, 13 Nov 2024 23:07:11 +0800 Subject: [PATCH] mm, doc: update read_ahead_kb for MADV_HUGEPAGE MADV_HUGEPAGE is a new addition to readahead with behavior distinct from normal pages. To prevent confusion, we should update the documentation accordingly. Link: https://lkml.kernel.org/r/20241113150711.1685-1-laoar.shao@gmail.com Signed-off-by: Yafang Shao Cc: David Hildenbrand Cc: Matthew Wilcox Signed-off-by: Andrew Morton --- Documentation/ABI/stable/sysfs-block | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/ABI/stable/sysfs-block b/Documentation/ABI/stable/sysfs-block index cea8856f798d..7a820a7d53aa 100644 --- a/Documentation/ABI/stable/sysfs-block +++ b/Documentation/ABI/stable/sysfs-block @@ -594,6 +594,9 @@ Description: [RW] Maximum number of kilobytes to read-ahead for filesystems on this block device. + For MADV_HUGEPAGE, the readahead size may exceed this setting + since its granularity is based on the hugepage size. + What: /sys/block//queue/rotational Date: January 2009