Commit 679299b3 authored Feb 04, 2008 by Matt Mackall Committed by Linus Torvalds Feb 05, 2008

slob: fix free block merging at head of subpage

We weren't merging freed blocks at the beginning of the free list. Fixing
this showed a 2.5% efficiency improvement in a userspace test harness.

Signed-off-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 8bc3be27

mm/slob.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -398,6 +398,10 @@ static void slob_free(void *block, int size)
		sp->units += units;

		if (b < sp->free) {
		if (b + units == sp->free) {
		units += slob_units(sp->free);
		sp->free = slob_next(sp->free);
		}
		set_slob(b, units, sp->free);
		sp->free = b;
		} else {