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| author | Nick Piggin <nickpiggin@yahoo.com.au> | 2007-05-16 22:10:49 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-17 05:23:02 -0700 |
| commit | afc0cedbe9138e3e8b38bfa1e4dfd01a2c537d62 (patch) | |
| tree | 0df03f95645ef76a387dd541da062b682319c921 /init | |
| parent | b2cd64153b94473f6bd82448a68b8e8c041676ea (diff) | |
| download | lwn-afc0cedbe9138e3e8b38bfa1e4dfd01a2c537d62.tar.gz lwn-afc0cedbe9138e3e8b38bfa1e4dfd01a2c537d62.zip | |
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 <npiggin@suse.de>
Acked-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/init/Kconfig b/init/Kconfig index 4e009fde4b69..9264895ab331 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. |