Had to tweak memory hogged

Took too much memory, many times tests ran out of memory.

BUG=chromium-os:35390
TEST=kernel_fs_Punybench --args=--disk

Change-Id: Icd9a83eaa68c70d4a36ef336cdc8e8b579726480
Reviewed-on: https://gerrit.chromium.org/gerrit/41587
Tested-by: Paul Taysom <taysom@chromium.org>
Reviewed-by: Luigi Semenzato <semenzato@chromium.org>
Commit-Queue: Paul Taysom <taysom@chromium.org>
diff --git a/file.m/uread.c b/file.m/uread.c
index e0fb7ae..27554b5 100644
--- a/file.m/uread.c
+++ b/file.m/uread.c
@@ -31,7 +31,7 @@
 enum {	/* Fraction of total memory to use for file size (1/n) */
 	FRACTION_OF_MEMORY = 4,
 	/* Fraction of file size for how much memory to leave free (1/n) */
-	FRACTION_OF_FILE_SIZE = 8 };
+	FRACTION_OF_FILE_SIZE = 4 };
 
 u64 Bufsize_log2 = 12;
 bool Hog_memory = TRUE;
diff --git a/file.m/ureadrand.c b/file.m/ureadrand.c
index 54312f2..dc529ca 100644
--- a/file.m/ureadrand.c
+++ b/file.m/ureadrand.c
@@ -39,7 +39,7 @@
 enum {	/* Fraction of total memory to use for file size (1/n) */
 	FRACTION_OF_MEMORY = 4,
 	/* Fraction of file size for how much memory to leave free (1/n) */
-	FRACTION_OF_FILE_SIZE = 8 };
+	FRACTION_OF_FILE_SIZE = 4 };
 
 u64 Bufsize_log2 = 12;
 
diff --git a/file.m/uwrite.c b/file.m/uwrite.c
index 3231fbf..a291334 100644
--- a/file.m/uwrite.c
+++ b/file.m/uwrite.c
@@ -31,7 +31,7 @@
 enum {	/* Fraction of total memory to use for file size (1/n) */
 	FRACTION_OF_MEMORY = 4,
 	/* Fraction of file size for how much memory to leave free (1/n) */
-	FRACTION_OF_FILE_SIZE = 8 };
+	FRACTION_OF_FILE_SIZE = 4 };
 
 u64 Bufsize_log2 = 12;
 bool Hog_memory = TRUE;