From afc0cedbe9138e3e8b38bfa1e4dfd01a2c537d62 Mon Sep 17 00:00:00 2001 From: Nick Piggin Date: Wed, 16 May 2007 22:10:49 -0700 Subject: slob: implement RCU freeing The SLOB allocator should implement SLAB_DESTROY_BY_RCU correctly, because even on UP, RCU freeing semantics are not equivalent to simply freeing immediately. This also allows SLOB to be used on SMP. Signed-off-by: Nick Piggin Acked-by: Matt Mackall Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- init/Kconfig | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) (limited to 'init') diff --git a/init/Kconfig b/init/Kconfig index 4e009fde4b6..9264895ab33 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -577,14 +577,11 @@ config SLUB and has enhanced diagnostics. config SLOB -# -# SLOB does not support SMP because SLAB_DESTROY_BY_RCU is unsupported -# - depends on EMBEDDED && !SMP && !SPARSEMEM + depends on EMBEDDED && !SPARSEMEM bool "SLOB (Simple Allocator)" help SLOB replaces the SLAB allocator with a drastically simpler - allocator. SLOB is more space efficient that SLAB but does not + allocator. SLOB is more space efficient than SLAB but does not scale well (single lock for all operations) and is also highly susceptible to fragmentation. SLUB can accomplish a higher object density. It is usually better to use SLUB instead of SLOB. -- cgit v1.2.3-70-g09d2