diff options
| author | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-09 09:38:59 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-09 09:38:59 -0800 |
| commit | 99b48cff405333afe26ac603b37639c410a48e5d (patch) | |
| tree | 31b427930317b1596ca6070585f66a108b722580 /include/linux/netdevice.h | |
| parent | 200d018eff4be3a1fb9823441cfcebb7de86a677 (diff) | |
| parent | d3dcc077bf88806201093f86325ec656e4dbfbce (diff) | |
Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6:
[NETLINK]: Put {IFA,IFLA}_{RTA,PAYLOAD} macros back for userspace.
[NET_SCHED] sch_htb: turn intermediate classes into leaves
[NET_SCHED] sch_cbq: deactivating when grafting, purging etc.
[XFRM]: Fix XFRMGRP_REPORT to use correct multicast group.
[NET]: Force a cache line split in hh_cache in SMP.
[NETPOLL]: make arp replies through netpoll use mac address of sender
[NETLINK]: Restore API compatibility of address and neighbour bits
[AX.25]: Fix default address and broadcast address initialization.
[AX.25]: Constify ax25 utility functions
[BNX2]: Add an error check.
[NET]: Convert hh_lock to seqlock.
Diffstat (limited to 'include/linux/netdevice.h')
| -rw-r--r-- | include/linux/netdevice.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index c57088f575a3..6be767c76b37 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -193,13 +193,20 @@ struct hh_cache { struct hh_cache *hh_next; /* Next entry */ atomic_t hh_refcnt; /* number of users */ - __be16 hh_type; /* protocol identifier, f.e ETH_P_IP +/* + * We want hh_output, hh_len, hh_lock and hh_data be a in a separate + * cache line on SMP. + * They are mostly read, but hh_refcnt may be changed quite frequently, + * incurring cache line ping pongs. + */ + __be16 hh_type ____cacheline_aligned_in_smp; + /* protocol identifier, f.e ETH_P_IP * NOTE: For VLANs, this will be the * encapuslated type. --BLG */ u16 hh_len; /* length of header */ int (*hh_output)(struct sk_buff *skb); - rwlock_t hh_lock; + seqlock_t hh_lock; /* cached hardware header; allow for machine alignment needs. */ #define HH_DATA_MOD 16 |