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| author | Eric Dumazet <dada1@cosmosbay.com> | 2008-11-20 20:39:09 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-11-20 20:39:09 -0800 |
| commit | 9db66bdcc83749affe61c61eb8ff3cf08f42afec (patch) | |
| tree | 81bb20e4f569d3b44731498428277db9d77fa7a9 /include/net/inet_hashtables.h | |
| parent | b8c26a33c8b6f0a150e9cb38ed80b890be55395c (diff) | |
| download | lwn-9db66bdcc83749affe61c61eb8ff3cf08f42afec.tar.gz lwn-9db66bdcc83749affe61c61eb8ff3cf08f42afec.zip | |
net: convert TCP/DCCP ehash rwlocks to spinlocks
Now TCP & DCCP use RCU lookups, we can convert ehash rwlocks to spinlocks.
/proc/net/tcp and other seq_file 'readers' can safely be converted to 'writers'.
This should speedup writers, since spin_lock()/spin_unlock()
only use one atomic operation instead of two for write_lock()/write_unlock()
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/inet_hashtables.h')
| -rw-r--r-- | include/net/inet_hashtables.h | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h index 62d2dd0d7860..28b3ee3e8d6d 100644 --- a/include/net/inet_hashtables.h +++ b/include/net/inet_hashtables.h @@ -116,7 +116,7 @@ struct inet_hashinfo { * TIME_WAIT sockets use a separate chain (twchain). */ struct inet_ehash_bucket *ehash; - rwlock_t *ehash_locks; + spinlock_t *ehash_locks; unsigned int ehash_size; unsigned int ehash_locks_mask; @@ -152,7 +152,7 @@ static inline struct inet_ehash_bucket *inet_ehash_bucket( return &hashinfo->ehash[hash & (hashinfo->ehash_size - 1)]; } -static inline rwlock_t *inet_ehash_lockp( +static inline spinlock_t *inet_ehash_lockp( struct inet_hashinfo *hashinfo, unsigned int hash) { @@ -177,16 +177,16 @@ static inline int inet_ehash_locks_alloc(struct inet_hashinfo *hashinfo) size = 4096; if (sizeof(rwlock_t) != 0) { #ifdef CONFIG_NUMA - if (size * sizeof(rwlock_t) > PAGE_SIZE) - hashinfo->ehash_locks = vmalloc(size * sizeof(rwlock_t)); + if (size * sizeof(spinlock_t) > PAGE_SIZE) + hashinfo->ehash_locks = vmalloc(size * sizeof(spinlock_t)); else #endif - hashinfo->ehash_locks = kmalloc(size * sizeof(rwlock_t), + hashinfo->ehash_locks = kmalloc(size * sizeof(spinlock_t), GFP_KERNEL); if (!hashinfo->ehash_locks) return ENOMEM; for (i = 0; i < size; i++) - rwlock_init(&hashinfo->ehash_locks[i]); + spin_lock_init(&hashinfo->ehash_locks[i]); } hashinfo->ehash_locks_mask = size - 1; return 0; @@ -197,7 +197,7 @@ static inline void inet_ehash_locks_free(struct inet_hashinfo *hashinfo) if (hashinfo->ehash_locks) { #ifdef CONFIG_NUMA unsigned int size = (hashinfo->ehash_locks_mask + 1) * - sizeof(rwlock_t); + sizeof(spinlock_t); if (size > PAGE_SIZE) vfree(hashinfo->ehash_locks); else |