Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751353AbWE2VZx (ORCPT ); Mon, 29 May 2006 17:25:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751359AbWE2VZw (ORCPT ); Mon, 29 May 2006 17:25:52 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:55480 "EHLO mx3.mail.elte.hu") by vger.kernel.org with ESMTP id S1751358AbWE2VZs (ORCPT ); Mon, 29 May 2006 17:25:48 -0400 Date: Mon, 29 May 2006 23:26:08 +0200 From: Ingo Molnar To: linux-kernel@vger.kernel.org Cc: Arjan van de Ven , Andrew Morton Subject: [patch 37/61] lock validator: special locking: dcache Message-ID: <20060529212608.GK3155@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060529212109.GA2058@elte.hu> User-Agent: Mutt/1.4.2.1i X-ELTE-SpamScore: 0.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=0.0 required=5.9 tests=AWL autolearn=no SpamAssassin version=3.0.3 0.0 AWL AWL: From: address is in the auto white-list X-ELTE-VirusStatus: clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2052 Lines: 66 From: Ingo Molnar teach special (recursive) locking code to the lock validator. Has no effect on non-lockdep kernels. Signed-off-by: Ingo Molnar Signed-off-by: Arjan van de Ven --- fs/dcache.c | 6 +++--- include/linux/dcache.h | 12 ++++++++++++ 2 files changed, 15 insertions(+), 3 deletions(-) Index: linux/fs/dcache.c =================================================================== --- linux.orig/fs/dcache.c +++ linux/fs/dcache.c @@ -1380,10 +1380,10 @@ void d_move(struct dentry * dentry, stru */ if (target < dentry) { spin_lock(&target->d_lock); - spin_lock(&dentry->d_lock); + spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED); } else { spin_lock(&dentry->d_lock); - spin_lock(&target->d_lock); + spin_lock_nested(&target->d_lock, DENTRY_D_LOCK_NESTED); } /* Move the dentry to the target hash queue, if on different bucket */ @@ -1420,7 +1420,7 @@ already_unhashed: } list_add(&dentry->d_u.d_child, &dentry->d_parent->d_subdirs); - spin_unlock(&target->d_lock); + spin_unlock_non_nested(&target->d_lock); fsnotify_d_move(dentry); spin_unlock(&dentry->d_lock); write_sequnlock(&rename_lock); Index: linux/include/linux/dcache.h =================================================================== --- linux.orig/include/linux/dcache.h +++ linux/include/linux/dcache.h @@ -114,6 +114,18 @@ struct dentry { unsigned char d_iname[DNAME_INLINE_LEN_MIN]; /* small names */ }; +/* + * dentry->d_lock spinlock nesting types: + * + * 0: normal + * 1: nested + */ +enum dentry_d_lock_type +{ + DENTRY_D_LOCK_NORMAL, + DENTRY_D_LOCK_NESTED +}; + struct dentry_operations { int (*d_revalidate)(struct dentry *, struct nameidata *); int (*d_hash) (struct dentry *, struct qstr *); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/