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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E0A8BC433EF for ; Mon, 31 Jan 2022 11:31:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1379014AbiAaL3n (ORCPT ); Mon, 31 Jan 2022 06:29:43 -0500 Received: from dfw.source.kernel.org ([139.178.84.217]:52264 "EHLO dfw.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1378455AbiAaLUM (ORCPT ); Mon, 31 Jan 2022 06:20:12 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 0E69560B98; Mon, 31 Jan 2022 11:20:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CB208C340E8; Mon, 31 Jan 2022 11:20:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643628011; bh=kbjFMXoRMtc4U9Oa+ibffCyvoiXCyLaA/lmIK/CuFx0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0FC9zEGhXUmaHnAFAX6uWFkZobR9OAe23VyB6re/zbCN0FIvaEW0ssgz2sLLffB+b 297YJT4xsPJ9FkzEf3LckfdXg7KUIDyBBtvHnKyK0AiReD5gYzCX2ojeGTRXhMp9yL awA7sm9+aZ1CseC8ok35J30lFqFeT/TN39sQaPI0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Christoph Hellwig , Mike Snitzer , Jens Axboe Subject: [PATCH 5.16 063/200] block: add bio_start_io_acct_time() to control start_time Date: Mon, 31 Jan 2022 11:55:26 +0100 Message-Id: <20220131105235.695349937@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220131105233.561926043@linuxfoundation.org> References: <20220131105233.561926043@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mike Snitzer commit e45c47d1f94e0cc7b6b079fdb4bcce2995e2adc4 upstream. bio_start_io_acct_time() interface is like bio_start_io_acct() that allows start_time to be passed in. This gives drivers the ability to defer starting accounting until after IO is issued (but possibily not entirely due to bio splitting). Reviewed-by: Christoph Hellwig Signed-off-by: Mike Snitzer Link: https://lore.kernel.org/r/20220128155841.39644-2-snitzer@redhat.com Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- block/blk-core.c | 25 +++++++++++++++++++------ include/linux/blkdev.h | 1 + 2 files changed, 20 insertions(+), 6 deletions(-) --- a/block/blk-core.c +++ b/block/blk-core.c @@ -1258,22 +1258,34 @@ void __blk_account_io_start(struct reque } static unsigned long __part_start_io_acct(struct block_device *part, - unsigned int sectors, unsigned int op) + unsigned int sectors, unsigned int op, + unsigned long start_time) { const int sgrp = op_stat_group(op); - unsigned long now = READ_ONCE(jiffies); part_stat_lock(); - update_io_ticks(part, now, false); + update_io_ticks(part, start_time, false); part_stat_inc(part, ios[sgrp]); part_stat_add(part, sectors[sgrp], sectors); part_stat_local_inc(part, in_flight[op_is_write(op)]); part_stat_unlock(); - return now; + return start_time; } /** + * bio_start_io_acct_time - start I/O accounting for bio based drivers + * @bio: bio to start account for + * @start_time: start time that should be passed back to bio_end_io_acct(). + */ +void bio_start_io_acct_time(struct bio *bio, unsigned long start_time) +{ + __part_start_io_acct(bio->bi_bdev, bio_sectors(bio), + bio_op(bio), start_time); +} +EXPORT_SYMBOL_GPL(bio_start_io_acct_time); + +/** * bio_start_io_acct - start I/O accounting for bio based drivers * @bio: bio to start account for * @@ -1281,14 +1293,15 @@ static unsigned long __part_start_io_acc */ unsigned long bio_start_io_acct(struct bio *bio) { - return __part_start_io_acct(bio->bi_bdev, bio_sectors(bio), bio_op(bio)); + return __part_start_io_acct(bio->bi_bdev, bio_sectors(bio), + bio_op(bio), jiffies); } EXPORT_SYMBOL_GPL(bio_start_io_acct); unsigned long disk_start_io_acct(struct gendisk *disk, unsigned int sectors, unsigned int op) { - return __part_start_io_acct(disk->part0, sectors, op); + return __part_start_io_acct(disk->part0, sectors, op, jiffies); } EXPORT_SYMBOL(disk_start_io_acct); --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1254,6 +1254,7 @@ unsigned long disk_start_io_acct(struct void disk_end_io_acct(struct gendisk *disk, unsigned int op, unsigned long start_time); +void bio_start_io_acct_time(struct bio *bio, unsigned long start_time); unsigned long bio_start_io_acct(struct bio *bio); void bio_end_io_acct_remapped(struct bio *bio, unsigned long start_time, struct block_device *orig_bdev);