From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (Postfix) with ESMTP id 8487D7F81 for ; Fri, 19 Jul 2013 01:25:38 -0500 (CDT) Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by relay3.corp.sgi.com (Postfix) with ESMTP id 00DA4AC010 for ; Thu, 18 Jul 2013 23:25:37 -0700 (PDT) Received: from ipmail06.adl6.internode.on.net (ipmail06.adl6.internode.on.net [150.101.137.145]) by cuda.sgi.com with ESMTP id gibpsffAnGfxrcAb for ; Thu, 18 Jul 2013 23:25:36 -0700 (PDT) Received: from disappointment.disaster.area ([192.168.1.110] helo=disappointment) by dastard with esmtp (Exim 4.76) (envelope-from ) id 1V0483-00048G-En for xfs@oss.sgi.com; Fri, 19 Jul 2013 16:25:23 +1000 Received: from dave by disappointment with local (Exim 4.80) (envelope-from ) id 1V0483-0001zw-Bb for xfs@oss.sgi.com; Fri, 19 Jul 2013 16:25:23 +1000 From: Dave Chinner Subject: [PATCH 40/49] xfs: Refactor xfs_ticket_alloc() to extract a new helper Date: Fri, 19 Jul 2013 16:25:11 +1000 Message-Id: <1374215120-7271-41-git-send-email-david@fromorbit.com> In-Reply-To: <1374215120-7271-1-git-send-email-david@fromorbit.com> References: <1374215120-7271-1-git-send-email-david@fromorbit.com> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: xfs@oss.sgi.com From: Jie Liu Refactor xlog_ticket_alloc() to extract a new helper, i.e. xfs_log_calc_unit_res(). This helper would be used to calculate the total log reservation size by adding extra log operation/transation headers for a new log ticket. Signed-off-by: Jie Liu Signed-off-by: Dave Chinner --- fs/xfs/xfs_log.c | 60 +++++++++++++++++++++++++++++++------------------ fs/xfs/xfs_log_format.h | 4 ++++ 2 files changed, 42 insertions(+), 22 deletions(-) diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index d852a2b..b02415b 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -3391,24 +3391,17 @@ xfs_log_ticket_get( } /* - * Allocate and initialise a new log ticket. + * Figure out the total log space unit (in bytes) that would be + * required for a log ticket. */ -struct xlog_ticket * -xlog_ticket_alloc( - struct xlog *log, - int unit_bytes, - int cnt, - char client, - bool permanent, - xfs_km_flags_t alloc_flags) +int +xfs_log_calc_unit_res( + struct xfs_mount *mp, + int unit_bytes) { - struct xlog_ticket *tic; - uint num_headers; - int iclog_space; - - tic = kmem_zone_zalloc(xfs_log_ticket_zone, alloc_flags); - if (!tic) - return NULL; + struct xlog *log = mp->m_log; + int iclog_space; + uint num_headers; /* * Permanent reservations have up to 'cnt'-1 active log operations @@ -3483,20 +3476,43 @@ xlog_ticket_alloc( unit_bytes += log->l_iclog_hsize; /* for roundoff padding for transaction data and one for commit record */ - if (xfs_sb_version_haslogv2(&log->l_mp->m_sb) && - log->l_mp->m_sb.sb_logsunit > 1) { + if (xfs_sb_version_haslogv2(&mp->m_sb) && mp->m_sb.sb_logsunit > 1) { /* log su roundoff */ - unit_bytes += 2*log->l_mp->m_sb.sb_logsunit; + unit_bytes += 2 * mp->m_sb.sb_logsunit; } else { /* BB roundoff */ - unit_bytes += 2*BBSIZE; + unit_bytes += 2 * BBSIZE; } + return unit_bytes; +} + +/* + * Allocate and initialise a new log ticket. + */ +struct xlog_ticket * +xlog_ticket_alloc( + struct xlog *log, + int unit_bytes, + int cnt, + char client, + bool permanent, + xfs_km_flags_t alloc_flags) +{ + struct xlog_ticket *tic; + int unit_res; + + tic = kmem_zone_zalloc(xfs_log_ticket_zone, alloc_flags); + if (!tic) + return NULL; + + unit_res = xfs_log_calc_unit_res(log->l_mp, unit_bytes); + atomic_set(&tic->t_ref, 1); tic->t_task = current; INIT_LIST_HEAD(&tic->t_queue); - tic->t_unit_res = unit_bytes; - tic->t_curr_res = unit_bytes; + tic->t_unit_res = unit_res; + tic->t_curr_res = unit_res; tic->t_cnt = cnt; tic->t_ocnt = cnt; tic->t_tid = prandom_u32(); diff --git a/fs/xfs/xfs_log_format.h b/fs/xfs/xfs_log_format.h index 198381e..cc08f59 100644 --- a/fs/xfs/xfs_log_format.h +++ b/fs/xfs/xfs_log_format.h @@ -18,6 +18,8 @@ #ifndef __XFS_LOG_FORMAT_H__ #define __XFS_LOG_FORMAT_H__ +struct xfs_mount; + /* * On-disk Log Format definitions. * @@ -834,4 +836,6 @@ struct xfs_icreate_log { __be32 icl_gen; /* inode generation number to use */ }; +int xfs_log_calc_unit_res(struct xfs_mount *mp, int unit_bytes); + #endif /* __XFS_LOG_FORMAT_H__ */ -- 1.8.3.2 _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs