[PATCH 1/6] readahead: sysctl parameters: set readahead_hit_rate=1

[Fengguang Wu <wfg@mail.ustc.edu.cn>]

[-- Attachment #1: readahead-sysctl-parameters-set-readahead_hit_rate-1.patch --]
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Set default readahead_hit_rate to 1 for the majority users.

Signed-off-by: Fengguang Wu <wfg@mail.ustc.edu.cn>
---
 Documentation/sysctl/vm.txt |    2 +-
 mm/readahead.c              |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

--- linux.orig/Documentation/sysctl/vm.txt
+++ linux/Documentation/sysctl/vm.txt
@@ -261,4 +261,4 @@ Possible values can be:
 
 The larger value, the more capabilities, with more possible overheads.
 
-The default value is 0.
+The default value is 1.
--- linux.orig/mm/readahead.c
+++ linux/mm/readahead.c
@@ -42,7 +42,7 @@ int readahead_ratio = 50;
 EXPORT_SYMBOL_GPL(readahead_ratio);
 
 /* Readahead as long as cache hit ratio keeps above 1/##. */
-int readahead_hit_rate = 0;
+int readahead_hit_rate = 1;
 #endif /* CONFIG_ADAPTIVE_READAHEAD */
 
 /*

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