From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: [PATCH 004 of 11] knfsd: convert sk_reserved to atomic_t Date: Mon, 31 Jul 2006 10:42:03 +1000 Message-ID: <1060731004203.29219@suse.de> References: <20060731103458.29040.patches@notabene> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Cc: nfs@lists.sourceforge.net, linux-kernel@vger.kernel.org Return-path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.91] helo=mail.sourceforge.net) by sc8-sf-list2-new.sourceforge.net with esmtp (Exim 4.43) id 1G7LrG-0003s7-DV for nfs@lists.sourceforge.net; Sun, 30 Jul 2006 17:42:10 -0700 Received: from ns2.suse.de ([195.135.220.15] helo=mx2.suse.de) by mail.sourceforge.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.44) id 1G7LrF-0001bO-5P for nfs@lists.sourceforge.net; Sun, 30 Jul 2006 17:42:10 -0700 To: Andrew Morton List-Id: "Discussion of NFS under Linux development, interoperability, and testing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: nfs-bounces@lists.sourceforge.net Errors-To: nfs-bounces@lists.sourceforge.net From: Greg Banks knfsd: 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 Signed-off-by: Neil Brown ### Diffstat output ./include/linux/sunrpc/svcsock.h | 2 +- ./net/sunrpc/svcsock.c | 12 +++++------- 2 files changed, 6 insertions(+), 8 deletions(-) diff .prev/include/linux/sunrpc/svcsock.h ./include/linux/sunrpc/svcsock.h --- .prev/include/linux/sunrpc/svcsock.h 2006-07-31 10:00:30.000000000 +1000 +++ ./include/linux/sunrpc/svcsock.h 2006-07-31 10:00:44.000000000 +1000 @@ -34,7 +34,7 @@ struct svc_sock { #define SK_OLD 9 /* used for temp socket aging mark+sweep */ #define SK_DETACHED 10 /* detached from tempsocks list */ - int sk_reserved; /* space on outq that is reserved */ + atomic_t sk_reserved; /* space on outq that is reserved */ spinlock_t sk_defer_lock; /* protects sk_deferred */ struct list_head sk_deferred; /* deferred requests that need to diff .prev/net/sunrpc/svcsock.c ./net/sunrpc/svcsock.c --- .prev/net/sunrpc/svcsock.c 2006-07-31 10:00:30.000000000 +1000 +++ ./net/sunrpc/svcsock.c 2006-07-31 10:00:44.000000000 +1000 @@ -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, 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); } @@ -1236,7 +1234,7 @@ svc_recv(struct svc_rqst *rqstp, long ti 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); ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964797AbWGaAm2 (ORCPT ); Sun, 30 Jul 2006 20:42:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964796AbWGaAmR (ORCPT ); Sun, 30 Jul 2006 20:42:17 -0400 Received: from ns2.suse.de ([195.135.220.15]:41101 "EHLO mx2.suse.de") by vger.kernel.org with ESMTP id S932499AbWGaAmI (ORCPT ); Sun, 30 Jul 2006 20:42:08 -0400 From: NeilBrown To: Andrew Morton Date: Mon, 31 Jul 2006 10:42:03 +1000 Message-Id: <1060731004203.29219@suse.de> X-face: [Gw_3E*Gng}4rRrKRYotwlE?.2|**#s9D Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org From: Greg Banks knfsd: 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 Signed-off-by: Neil Brown ### Diffstat output ./include/linux/sunrpc/svcsock.h | 2 +- ./net/sunrpc/svcsock.c | 12 +++++------- 2 files changed, 6 insertions(+), 8 deletions(-) diff .prev/include/linux/sunrpc/svcsock.h ./include/linux/sunrpc/svcsock.h --- .prev/include/linux/sunrpc/svcsock.h 2006-07-31 10:00:30.000000000 +1000 +++ ./include/linux/sunrpc/svcsock.h 2006-07-31 10:00:44.000000000 +1000 @@ -34,7 +34,7 @@ struct svc_sock { #define SK_OLD 9 /* used for temp socket aging mark+sweep */ #define SK_DETACHED 10 /* detached from tempsocks list */ - int sk_reserved; /* space on outq that is reserved */ + atomic_t sk_reserved; /* space on outq that is reserved */ spinlock_t sk_defer_lock; /* protects sk_deferred */ struct list_head sk_deferred; /* deferred requests that need to diff .prev/net/sunrpc/svcsock.c ./net/sunrpc/svcsock.c --- .prev/net/sunrpc/svcsock.c 2006-07-31 10:00:30.000000000 +1000 +++ ./net/sunrpc/svcsock.c 2006-07-31 10:00:44.000000000 +1000 @@ -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, 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); } @@ -1236,7 +1234,7 @@ svc_recv(struct svc_rqst *rqstp, long ti 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);