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authorTejun Heo <tj@kernel.org>2010-06-27 18:50:00 +0200
committerTejun Heo <tj@kernel.org>2010-06-27 18:50:00 +0200
commit099a19d91ca429944743d51bef8fee240e94d8e3 (patch)
tree55bdc0f25ecbf38240782fb1d9a80d33c0100eb6 /init
parent4ba6ce250e406b20bcd6f0f3aed6b3d80965e6c2 (diff)
downloadkernel-099a19d91ca429944743d51bef8fee240e94d8e3.tar.gz
percpu: allow limited allocation before slab is online
This patch updates percpu allocator such that it can serve limited amount of allocation before slab comes online. This is primarily to allow slab to depend on working percpu allocator. Two parameters, PERCPU_DYNAMIC_EARLY_SIZE and SLOTS, determine how much memory space and allocation map slots are reserved. If this reserved area is exhausted, WARN_ON_ONCE() will trigger and allocation will fail till slab comes online. The following changes are made to implement early alloc. * pcpu_mem_alloc() now checks slab_is_available() * Chunks are allocated using pcpu_mem_alloc() * Init paths make sure ai->dyn_size is at least as large as PERCPU_DYNAMIC_EARLY_SIZE. * Initial alloc maps are allocated in __initdata and copied to kmalloc'd areas once slab is online. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Christoph Lameter <cl@linux-foundation.org>
Diffstat (limited to 'init')
-rw-r--r--init/main.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/init/main.c b/init/main.c
index 3bdb152f412f..3ff8dd0fb512 100644
--- a/init/main.c
+++ b/init/main.c
@@ -522,6 +522,7 @@ static void __init mm_init(void)
page_cgroup_init_flatmem();
mem_init();
kmem_cache_init();
+ percpu_init_late();
pgtable_cache_init();
vmalloc_init();
}