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rhashtable: compact struct rhashtable_params

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By using smaller datatypes this (rather large) struct shrinks considerably
(80 -> 48 bytes on x86_64).

As this is embedded in other structs, this also rerduces size of several
others, e.g. cls_fl_head or nft_hash.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Westphal 2017-05-01 22:18:01 +02:00 committed by David S. Miller
parent e06422c439
commit 48e75b4306
2 changed files with 10 additions and 10 deletions
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18
include/linux/rhashtable.h
View File

@ -127,23 +127,23 @@ struct rhashtable;
* @head_offset: Offset of rhash_head in struct to be hashed
* @max_size: Maximum size while expanding
* @min_size: Minimum size while shrinking
* @nulls_base: Base value to generate nulls marker
* @automatic_shrinking: Enable automatic shrinking of tables
* @locks_mul: Number of bucket locks to allocate per cpu (default: 128)
* @automatic_shrinking: Enable automatic shrinking of tables
* @nulls_base: Base value to generate nulls marker
* @hashfn: Hash function (default: jhash2 if !(key_len % 4), or jhash)
* @obj_hashfn: Function to hash object
* @obj_cmpfn: Function to compare key with object
*/
struct rhashtable_params {
size_t nelem_hint;
size_t key_len;
size_t key_offset;
size_t head_offset;
u16 nelem_hint;
u16 key_len;
u16 key_offset;
u16 head_offset;
unsigned int max_size;
unsigned int min_size;
u32 nulls_base;
u16 min_size;
bool automatic_shrinking;
size_t locks_mul;
u8 locks_mul;
u32 nulls_base;
rht_hashfn_t hashfn;
rht_obj_hashfn_t obj_hashfn;
rht_obj_cmpfn_t obj_cmpfn;

2
lib/rhashtable.c
View File

@ -967,7 +967,7 @@ int rhashtable_init(struct rhashtable *ht,
ht->max_elems = ht->p.max_size * 2;
}
ht->p.min_size = max(ht->p.min_size, HASH_MIN_SIZE);
ht->p.min_size = max_t(u16, ht->p.min_size, HASH_MIN_SIZE);
if (params->nelem_hint)
size = rounded_hashtable_size(&ht->p);