[PATCH] slob_free:free objects to their own list

[Bob Liu <lliubbo@gmail.com>]

slob has alloced smaller objects from their own list in reduce
overall external fragmentation and increase repeatability,
free to their own list also.

Signed-off-by: Bob Liu <lliubbo@gmail.com>
---
 mm/slob.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/mm/slob.c b/mm/slob.c
index 3f19a34..d582171 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -396,6 +396,7 @@ static void slob_free(void *block, int size)
 	slob_t *prev, *next, *b = (slob_t *)block;
 	slobidx_t units;
 	unsigned long flags;
+	struct list_head *slob_list;
 
 	if (unlikely(ZERO_OR_NULL_PTR(block)))
 		return;
@@ -424,7 +425,13 @@ static void slob_free(void *block, int size)
 		set_slob(b, units,
 			(void *)((unsigned long)(b +
 					SLOB_UNITS(PAGE_SIZE)) & PAGE_MASK));
-		set_slob_page_free(sp, &free_slob_small);
+		if (size < SLOB_BREAK1)
+			slob_list = &free_slob_small;
+		else if (size < SLOB_BREAK2)
+			slob_list = &free_slob_medium;
+		else
+			slob_list = &free_slob_large;
+		set_slob_page_free(sp, slob_list);
 		goto out;
 	}
 
-- 
1.5.6.3

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