Messages in this thread | | | Subject | Re: [Q] Default SLAB allocator | From | Eric Dumazet <> | Date | Tue, 16 Oct 2012 14:56:00 +0200 |
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On Tue, 2012-10-16 at 09:35 -0300, Ezequiel Garcia wrote:
> Now, returning to the fragmentation. The problem with SLAB is that > its smaller cache available for kmalloced objects is 32 bytes; > while SLUB allows 8, 16, 24 ... > > Perhaps adding smaller caches to SLAB might make sense? > Is there any strong reason for NOT doing this?
I would remove small kmalloc-XX caches, as sharing a cache line is sometime dangerous for performance, because of false sharing.
They make sense only for very small hosts.
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