From a5a374c21a335c0acc921cb0895bb5607bde8582 Mon Sep 17 00:00:00 2001 From: Alexandre Frade Date: Mon, 29 Jan 2018 17:21:43 +0000 Subject: [PATCH] mm: set 128/2048 (min/max) kilobytes to read-ahead for filesystems on this block device Signed-off-by: Alexandre Frade --- include/linux/mm.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index ea818ff739cd..602c5b5dd9b8 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2285,8 +2285,8 @@ int __must_check write_one_page(struct page *page); void task_dirty_inc(struct task_struct *tsk); /* readahead.c */ -#define VM_MAX_READAHEAD 128 /* kbytes */ -#define VM_MIN_READAHEAD 16 /* kbytes (includes current page) */ +#define VM_MAX_READAHEAD 2048 /* kbytes */ +#define VM_MIN_READAHEAD 256 /* kbytes (includes current page) */ int force_page_cache_readahead(struct address_space *mapping, struct file *filp, pgoff_t offset, unsigned long nr_to_read); -- 2.14.2