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authorGreg Banks <gnb@melbourne.sgi.com>2006-10-02 02:17:56 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-02 07:57:19 -0700
commit5685f0fa1c24b138d041ef129ed419c5effa40e1 (patch)
tree068c413c32cc7735a590d4ec16efe55894e67b80 /net
parent1a68d952af5f43032012d26dd0d5164c9e9986bc (diff)
downloadconfigs-5685f0fa1c24b138d041ef129ed419c5effa40e1.tar.gz
[PATCH] knfsd: convert sk_reserved to atomic_t
Convert the svc_sock->sk_reserved variable from an int protected by svc_serv->sv_lock, to an atomic. This reduces (by 1) the number of places we need to take the (effectively global) svc_serv->sv_lock. Signed-off-by: Greg Banks <gnb@melbourne.sgi.com> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'net')
-rw-r--r--net/sunrpc/svcsock.c12
1 files changed, 5 insertions, 7 deletions
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index bdb5c2841db..88b51c4ecb8 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -177,13 +177,13 @@ svc_sock_enqueue(struct svc_sock *svsk)
}
set_bit(SOCK_NOSPACE, &svsk->sk_sock->flags);
- if (((svsk->sk_reserved + serv->sv_bufsz)*2
+ if (((atomic_read(&svsk->sk_reserved) + serv->sv_bufsz)*2
> svc_sock_wspace(svsk))
&& !test_bit(SK_CLOSE, &svsk->sk_flags)
&& !test_bit(SK_CONN, &svsk->sk_flags)) {
/* Don't enqueue while not enough space for reply */
dprintk("svc: socket %p no space, %d*2 > %ld, not enqueued\n",
- svsk->sk_sk, svsk->sk_reserved+serv->sv_bufsz,
+ svsk->sk_sk, atomic_read(&svsk->sk_reserved)+serv->sv_bufsz,
svc_sock_wspace(svsk));
goto out_unlock;
}
@@ -209,7 +209,7 @@ svc_sock_enqueue(struct svc_sock *svsk)
rqstp->rq_sock = svsk;
atomic_inc(&svsk->sk_inuse);
rqstp->rq_reserved = serv->sv_bufsz;
- svsk->sk_reserved += rqstp->rq_reserved;
+ atomic_add(rqstp->rq_reserved, &svsk->sk_reserved);
wake_up(&rqstp->rq_wait);
} else {
dprintk("svc: socket %p put into queue\n", svsk->sk_sk);
@@ -271,10 +271,8 @@ void svc_reserve(struct svc_rqst *rqstp, int space)
if (space < rqstp->rq_reserved) {
struct svc_sock *svsk = rqstp->rq_sock;
- spin_lock_bh(&svsk->sk_server->sv_lock);
- svsk->sk_reserved -= (rqstp->rq_reserved - space);
+ atomic_sub((rqstp->rq_reserved - space), &svsk->sk_reserved);
rqstp->rq_reserved = space;
- spin_unlock_bh(&svsk->sk_server->sv_lock);
svc_sock_enqueue(svsk);
}
@@ -1226,7 +1224,7 @@ svc_recv(struct svc_rqst *rqstp, long timeout)
rqstp->rq_sock = svsk;
atomic_inc(&svsk->sk_inuse);
rqstp->rq_reserved = serv->sv_bufsz;
- svsk->sk_reserved += rqstp->rq_reserved;
+ atomic_add(rqstp->rq_reserved, &svsk->sk_reserved);
} else {
/* No data pending. Go to sleep */
svc_serv_enqueue(serv, rqstp);