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struct xfrm_state is rather large (768 bytes here) and therefore wastes quite a lot of memory as it falls into the kmalloc-1024 slab cache, leaving 256 bytes of unused memory per XFRM state object -- a net waste of 25%. Using a dedicated slab cache for struct xfrm_state reduces the level of internal fragmentation to a minimum. On my configuration SLUB chooses to create a slab cache covering 4 pages holding 21 objects, resulting in an average memory waste of ~13 bytes per object -- a net waste of only 1.6%. In my tests this led to memory savings of roughly 2.3MB for 10k XFRM states. Signed-off-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> |
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| .. | ||
| Kconfig | ||
| Makefile | ||
| xfrm_algo.c | ||
| xfrm_device.c | ||
| xfrm_hash.c | ||
| xfrm_hash.h | ||
| xfrm_input.c | ||
| xfrm_ipcomp.c | ||
| xfrm_output.c | ||
| xfrm_policy.c | ||
| xfrm_proc.c | ||
| xfrm_replay.c | ||
| xfrm_state.c | ||
| xfrm_sysctl.c | ||
| xfrm_user.c | ||