The RMC cache has 256 list heads plus a u32, which puts it at the
unfortunate size of 4104 bytes with padding. kmalloc() will then
round this up to the next power-of-two, so we wind up actually
using two pages here where most of the second is wasted.
Switch to hlist heads here to reduce the structure size down to
fit within a page.
Signed-off-by: Bob Copeland <m...@bobcopeland.com>
---
net/mac80211/mesh.c | 18 ++++++++++--------
net/mac80211/mesh.h | 4 ++--
2 files changed, 12 insertions(+), 10 deletions(-)
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index d0d8eeaa8129..1a2aaf461e98 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -174,22 +174,23 @@ int mesh_rmc_init(struct ieee80211_sub_if_data *sdata)
return -ENOMEM;
sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1;
for (i = 0; i < RMC_BUCKETS; i++)
- INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i]);
+ INIT_HLIST_HEAD(&sdata->u.mesh.rmc->bucket[i]);
return 0;
}
void mesh_rmc_free(struct ieee80211_sub_if_data *sdata)
{
struct mesh_rmc *rmc = sdata->u.mesh.rmc;
- struct rmc_entry *p, *n;
+ struct rmc_entry *p;
+ struct hlist_node *n;
int i;
if (!sdata->u.mesh.rmc)
return;
for (i = 0; i < RMC_BUCKETS; i++) {
- list_for_each_entry_safe(p, n, &rmc->bucket[i], list) {
- list_del(&p->list);
+ hlist_for_each_entry_safe(p, n, &rmc->bucket[i], list) {
+ hlist_del(&p->list);
kmem_cache_free(rm_cache, p);
}
}
@@ -218,7 +219,8 @@ int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
u32 seqnum = 0;
int entries = 0;
u8 idx;
- struct rmc_entry *p, *n;
+ struct rmc_entry *p;
+ struct hlist_node *n;
if (!rmc)
return -1;
@@ -226,11 +228,11 @@ int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
/* Don't care about endianness since only match matters */
memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum));
idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask;
- list_for_each_entry_safe(p, n, &rmc->bucket[idx], list) {
+ hlist_for_each_entry_safe(p, n, &rmc->bucket[idx], list) {
++entries;
if (time_after(jiffies, p->exp_time) ||
entries == RMC_QUEUE_MAX_LEN) {
- list_del(&p->list);
+ hlist_del(&p->list);
kmem_cache_free(rm_cache, p);
--entries;
} else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa))
@@ -244,7 +246,7 @@ int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
p->seqnum = seqnum;
p->exp_time = jiffies + RMC_TIMEOUT;
memcpy(p->sa, sa, ETH_ALEN);
- list_add(&p->list, &rmc->bucket[idx]);
+ hlist_add_head(&p->list, &rmc->bucket[idx]);
return 0;
}
diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h
index e1415c952e9c..bc3f9a32b5a4 100644
--- a/net/mac80211/mesh.h
+++ b/net/mac80211/mesh.h
@@ -158,14 +158,14 @@ struct mesh_table {
* that are found in the cache.
*/
struct rmc_entry {
- struct list_head list;
+ struct hlist_node list;
u32 seqnum;
unsigned long exp_time;
u8 sa[ETH_ALEN];
};
struct mesh_rmc {
- struct list_head bucket[RMC_BUCKETS];
+ struct hlist_head bucket[RMC_BUCKETS];
u32 idx_mask;
};
--
2.6.1
--
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