From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,TVD_PH_BODY_ACCOUNTS_PRE, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6DD73C433E6 for ; Fri, 5 Mar 2021 05:12:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4912065013 for ; Fri, 5 Mar 2021 05:12:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229573AbhCEFMY (ORCPT ); Fri, 5 Mar 2021 00:12:24 -0500 Received: from mail107.syd.optusnet.com.au ([211.29.132.53]:36882 "EHLO mail107.syd.optusnet.com.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229562AbhCEFL7 (ORCPT ); Fri, 5 Mar 2021 00:11:59 -0500 Received: from dread.disaster.area (pa49-179-130-210.pa.nsw.optusnet.com.au [49.179.130.210]) by mail107.syd.optusnet.com.au (Postfix) with ESMTPS id 88C45ECB21D for ; Fri, 5 Mar 2021 16:11:51 +1100 (AEDT) Received: from discord.disaster.area ([192.168.253.110]) by dread.disaster.area with esmtp (Exim 4.92.3) (envelope-from ) id 1lI2kh-00Fbp1-2d for linux-xfs@vger.kernel.org; Fri, 05 Mar 2021 16:11:51 +1100 Received: from dave by discord.disaster.area with local (Exim 4.94) (envelope-from ) id 1lI2kg-000la3-Qf for linux-xfs@vger.kernel.org; Fri, 05 Mar 2021 16:11:50 +1100 From: Dave Chinner To: linux-xfs@vger.kernel.org Subject: [PATCH 27/45] xfs: pass lv chain length into xlog_write() Date: Fri, 5 Mar 2021 16:11:25 +1100 Message-Id: <20210305051143.182133-28-david@fromorbit.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20210305051143.182133-1-david@fromorbit.com> References: <20210305051143.182133-1-david@fromorbit.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Optus-CM-Score: 0 X-Optus-CM-Analysis: v=2.3 cv=F8MpiZpN c=1 sm=1 tr=0 cx=a_idp_d a=JD06eNgDs9tuHP7JIKoLzw==:117 a=JD06eNgDs9tuHP7JIKoLzw==:17 a=dESyimp9J3IA:10 a=20KFwNOVAAAA:8 a=hIND3nFijBJh5Kz5_mcA:9 a=iIF9SUj9uIzfPmGa:21 a=766Es58KMcJUOJTe:21 Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org From: Dave Chinner The caller of xlog_write() usually has a close accounting of the aggregated vector length contained in the log vector chain passed to xlog_write(). There is no need to iterate the chain to calculate he length of the data in xlog_write_calculate_len() if the caller is already iterating that chain to build it. Passing in the vector length avoids doing an extra chain iteration, which can be a significant amount of work given that large CIL commits can have hundreds of thousands of vectors attached to the chain. Signed-off-by: Dave Chinner --- fs/xfs/xfs_log.c | 37 ++++++------------------------------- fs/xfs/xfs_log_cil.c | 18 +++++++++++++----- fs/xfs/xfs_log_priv.h | 2 +- 3 files changed, 20 insertions(+), 37 deletions(-) diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 412b167d8d0e..22f97914ab99 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -858,7 +858,8 @@ xlog_write_unmount_record( */ if (log->l_targ != log->l_mp->m_ddev_targp) blkdev_issue_flush(log->l_targ->bt_bdev); - return xlog_write(log, &vec, ticket, NULL, NULL, XLOG_UNMOUNT_TRANS); + return xlog_write(log, &vec, ticket, NULL, NULL, XLOG_UNMOUNT_TRANS, + reg.i_len); } /* @@ -1577,7 +1578,8 @@ xlog_commit_record( /* account for space used by record data */ ticket->t_curr_res -= reg.i_len; - error = xlog_write(log, &vec, ticket, lsn, iclog, XLOG_COMMIT_TRANS); + error = xlog_write(log, &vec, ticket, lsn, iclog, XLOG_COMMIT_TRANS, + reg.i_len); if (error) xfs_force_shutdown(log->l_mp, SHUTDOWN_LOG_IO_ERROR); return error; @@ -2097,32 +2099,6 @@ xlog_print_trans( } } -/* - * Calculate the potential space needed by the log vector. All regions contain - * their own opheaders and they are accounted for in region space so we don't - * need to add them to the vector length here. - */ -static int -xlog_write_calc_vec_length( - struct xlog_ticket *ticket, - struct xfs_log_vec *log_vector, - uint optype) -{ - struct xfs_log_vec *lv; - int len = 0; - int i; - - for (lv = log_vector; lv; lv = lv->lv_next) { - /* we don't write ordered log vectors */ - if (lv->lv_buf_len == XFS_LOG_VEC_ORDERED) - continue; - - for (i = 0; i < lv->lv_niovecs; i++) - len += lv->lv_iovecp[i].i_len; - } - return len; -} - static xlog_op_header_t * xlog_write_setup_ophdr( struct xlog_op_header *ophdr, @@ -2285,13 +2261,13 @@ xlog_write( struct xlog_ticket *ticket, xfs_lsn_t *start_lsn, struct xlog_in_core **commit_iclog, - uint optype) + uint optype, + uint32_t len) { struct xlog_in_core *iclog = NULL; struct xfs_log_vec *lv = log_vector; struct xfs_log_iovec *vecp = lv->lv_iovecp; int index = 0; - int len; int partial_copy = 0; int partial_copy_len = 0; int contwr = 0; @@ -2306,7 +2282,6 @@ xlog_write( xfs_force_shutdown(log->l_mp, SHUTDOWN_LOG_IO_ERROR); } - len = xlog_write_calc_vec_length(ticket, log_vector, optype); if (start_lsn) *start_lsn = 0; while (lv && (!lv->lv_niovecs || index < lv->lv_niovecs)) { diff --git a/fs/xfs/xfs_log_cil.c b/fs/xfs/xfs_log_cil.c index 7a5e6bdb7876..34abc3bae587 100644 --- a/fs/xfs/xfs_log_cil.c +++ b/fs/xfs/xfs_log_cil.c @@ -710,11 +710,12 @@ xlog_cil_build_trans_hdr( sizeof(struct xfs_trans_header); hdr->lhdr[1].i_type = XLOG_REG_TYPE_TRANSHDR; - tic->t_curr_res -= hdr->lhdr[0].i_len + hdr->lhdr[1].i_len; - lvhdr->lv_niovecs = 2; lvhdr->lv_iovecp = &hdr->lhdr[0]; + lvhdr->lv_bytes = hdr->lhdr[0].i_len + hdr->lhdr[1].i_len; lvhdr->lv_next = ctx->lv_chain; + + tic->t_curr_res -= lvhdr->lv_bytes; } /* @@ -742,7 +743,8 @@ xlog_cil_push_work( struct xfs_log_vec *lv; struct xfs_cil_ctx *new_ctx; struct xlog_in_core *commit_iclog; - int num_iovecs; + int num_iovecs = 0; + int num_bytes = 0; int error = 0; struct xlog_cil_trans_hdr thdr; struct xfs_log_vec lvhdr = { NULL }; @@ -841,7 +843,6 @@ xlog_cil_push_work( * by the flush lock. */ lv = NULL; - num_iovecs = 0; while (!list_empty(&cil->xc_cil)) { struct xfs_log_item *item; @@ -855,6 +856,10 @@ xlog_cil_push_work( lv = item->li_lv; item->li_lv = NULL; num_iovecs += lv->lv_niovecs; + + /* we don't write ordered log vectors */ + if (lv->lv_buf_len != XFS_LOG_VEC_ORDERED) + num_bytes += lv->lv_bytes; } /* @@ -893,6 +898,9 @@ xlog_cil_push_work( * transaction header here as it is not accounted for in xlog_write(). */ xlog_cil_build_trans_hdr(ctx, &thdr, &lvhdr, num_iovecs); + num_iovecs += lvhdr.lv_niovecs; + num_bytes += lvhdr.lv_bytes; + /* * Before we format and submit the first iclog, we have to ensure that @@ -907,7 +915,7 @@ xlog_cil_push_work( * write head. */ error = xlog_write(log, &lvhdr, ctx->ticket, &ctx->start_lsn, NULL, - XLOG_START_TRANS); + XLOG_START_TRANS, num_bytes); if (error) goto out_abort_free_ticket; diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index 8ee6a5f74396..003c11653955 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -462,7 +462,7 @@ void xlog_print_tic_res(struct xfs_mount *mp, struct xlog_ticket *ticket); void xlog_print_trans(struct xfs_trans *); int xlog_write(struct xlog *log, struct xfs_log_vec *log_vector, struct xlog_ticket *tic, xfs_lsn_t *start_lsn, - struct xlog_in_core **commit_iclog, uint optype); + struct xlog_in_core **commit_iclog, uint optype, uint32_t len); int xlog_commit_record(struct xlog *log, struct xlog_ticket *ticket, struct xlog_in_core **iclog, xfs_lsn_t *lsn); void xlog_state_switch_iclogs(struct xlog *log, struct xlog_in_core *iclog, -- 2.28.0