Messages in this thread | | | Subject | Re: [PATCH] (repost) kmem_cache_zalloc | From | Eric Sandeen <> | Date | 25 Apr 2002 15:33:21 -0500 |
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Hi Christoph -
On Thu, 2002-04-25 at 03:41, Christoph Hellwig wrote:
> I don't think kmem_cache_zalloc is a good idea. The idea behind the slab > cache is to allow object reuse by storing constructed objects in the > caches, and a memset directly after the alloc destroys the object state. > A kmen_zalloc/kzalloc might make more sense.
The constructor is one part of it, but what about more efficient memory use? If we let things fall into the default power-of-two caches, we'd waste quite a lot of memory.
See http://oss.sgi.com/~sandeen/slabinfo.html for example.
On this machine we'd use 30% more memory by using kmem_alloc vs kmem_cache_alloc.
-Eric
-- Eric Sandeen XFS for Linux http://oss.sgi.com/projects/xfs sandeen@sgi.com SGI, Inc.
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