From patchwork Fri Aug 11 21:35:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bart Van Assche X-Patchwork-Id: 13351474 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 1368DC04A6A for ; Fri, 11 Aug 2023 21:36:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236935AbjHKVgK (ORCPT ); Fri, 11 Aug 2023 17:36:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49340 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231659AbjHKVgJ (ORCPT ); Fri, 11 Aug 2023 17:36:09 -0400 Received: from mail-pl1-f172.google.com (mail-pl1-f172.google.com [209.85.214.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 47A41213F; Fri, 11 Aug 2023 14:36:09 -0700 (PDT) Received: by mail-pl1-f172.google.com with SMTP id d9443c01a7336-1bbf8cb694aso21064425ad.3; Fri, 11 Aug 2023 14:36:09 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691789769; x=1692394569; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=ZP2zWZCEMkImhnIX+u/m9IfTzgWoVmIHljvmPKpsZus=; b=lwam60Qa5A4dDnqA6qXjRP/yEr0ki1zVtLV+6SUzlrQcxJvWpkHztffYM3ITsSlPlR bWPAFwDHPrFytulsgejNSHyPzuc0J7RRQ2ZxeTa/ikGoPaqjBsuFXaehCisUsyhB0qHL p9iiDK9Ez/vi+4HNCdobDKxa+xM5CJu6blx4slpdu5DdnNUh1jzHKkKE0C3XwRn9xTNm zNpXIrvemHLTXEbbSC6G6tBwEWSsAr71Cx9oKzmqzUw5lMcg+4amo+lTqcXJzYA54d79 JqlH9yImT0CJjZ6liFeIKL+zLCx9DIeLUWscZsz6cM5Gf6DfyWa8vrFWRRckFO1k3/HP nupw== X-Gm-Message-State: AOJu0YxPC194jiTsES/D+FTqAYZqqoZMnVaZYFc9HOVeC4XufOFzZIjg W7ipFg6sqI0ZAfyiaGPj1QI= X-Google-Smtp-Source: AGHT+IH8OgZ8pKXOo5AFotp14Xd8C4Zb10B4P6QkS78jJPyGh88JhdSvnymlNG40m6wf+eH3gOyKoA== X-Received: by 2002:a17:902:ecc5:b0:1bc:7001:6e5e with SMTP id a5-20020a170902ecc500b001bc70016e5emr3511910plh.32.1691789768566; Fri, 11 Aug 2023 14:36:08 -0700 (PDT) Received: from bvanassche-linux.mtv.corp.google.com ([2620:15c:211:201:cdd8:4c3:2f3c:adea]) by smtp.gmail.com with ESMTPSA id c10-20020a170903234a00b001b89c313185sm4394865plh.205.2023.08.11.14.36.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 11 Aug 2023 14:36:08 -0700 (PDT) From: Bart Van Assche To: Jens Axboe Cc: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, "Martin K . Petersen" , Christoph Hellwig , Bart Van Assche Subject: [PATCH v8 0/9] Improve performance for zoned UFS devices Date: Fri, 11 Aug 2023 14:35:34 -0700 Message-ID: <20230811213604.548235-1-bvanassche@acm.org> X-Mailer: git-send-email 2.41.0.640.ga95def55d0-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Hi Jens, This patch series improves small write IOPS by a factor of four (+300%) for zoned UFS devices on my test setup with an UFSHCI 3.0 controller. Please consider this patch series for the next merge window. Thank you, Bart. Changes compared to v7: - Split the queue_limits member variable `use_zone_write_lock' into two member variables: `use_zone_write_lock' (set by disk_set_zoned()) and `driver_preserves_write_order' (set by the block driver or SCSI LLD). This should clear up the confusion about the purpose of this variable. - Moved the code for sorting SCSI commands by LBA from the SCSI error handler into the SCSI disk (sd) driver as requested by Christoph. Changes compared to v6: - Removed QUEUE_FLAG_NO_ZONE_WRITE_LOCK and instead introduced a flag in the request queue limits data structure. Changes compared to v5: - Renamed scsi_cmp_lba() into scsi_cmp_sector(). - Improved several source code comments. Changes compared to v4: - Dropped the patch that introduces the REQ_NO_ZONE_WRITE_LOCK flag. - Dropped the null_blk patch and added two scsi_debug patches instead. - Dropped the f2fs patch. - Split the patch for the UFS driver into two patches. - Modified several patch descriptions and source code comments. - Renamed dd_use_write_locking() into dd_use_zone_write_locking(). - Moved the list_sort() call from scsi_unjam_host() into scsi_eh_flush_done_q() such that sorting happens just before reinserting. - Removed the scsi_cmd_retry_allowed() call from scsi_check_sense() to make sure that the retry counter is adjusted once per retry instead of twice. Changes compared to v3: - Restored the patch that introduces QUEUE_FLAG_NO_ZONE_WRITE_LOCK. That patch had accidentally been left out from v2. - In patch "block: Introduce the flag REQ_NO_ZONE_WRITE_LOCK", improved the patch description and added the function blk_no_zone_write_lock(). - In patch "block/mq-deadline: Only use zone locking if necessary", moved the blk_queue_is_zoned() call into dd_use_write_locking(). - In patch "fs/f2fs: Disable zone write locking", set REQ_NO_ZONE_WRITE_LOCK from inside __bio_alloc() instead of in f2fs_submit_write_bio(). Changes compared to v2: - Renamed the request queue flag for disabling zone write locking. - Introduced a new request flag for disabling zone write locking. - Modified the mq-deadline scheduler such that zone write locking is only disabled if both flags are set. - Added an F2FS patch that sets the request flag for disabling zone write locking. - Only disable zone write locking in the UFS driver if auto-hibernation is disabled. Changes compared to v1: - Left out the patches that are already upstream. - Switched the approach in patch "scsi: Retry unaligned zoned writes" from retrying immediately to sending unaligned write commands to the SCSI error handler. Bart Van Assche (9): block: Introduce more member variables related to zone write locking block/mq-deadline: Only use zone locking if necessary scsi: core: Call .eh_prepare_resubmit() before resubmitting scsi: sd: Sort commands by LBA before resubmitting scsi: core: Retry unaligned zoned writes scsi: scsi_debug: Support disabling zone write locking scsi: scsi_debug: Support injecting unaligned write errors scsi: ufs: Split an if-condition scsi: ufs: Inform the block layer about write ordering block/blk-settings.c | 7 +++ block/mq-deadline.c | 14 +++--- drivers/scsi/Kconfig | 2 + drivers/scsi/Kconfig.kunit | 4 ++ drivers/scsi/Makefile | 2 + drivers/scsi/Makefile.kunit | 1 + drivers/scsi/scsi_debug.c | 20 +++++++- drivers/scsi/scsi_error.c | 59 ++++++++++++++++++++++ drivers/scsi/scsi_error_test.c | 92 ++++++++++++++++++++++++++++++++++ drivers/scsi/scsi_lib.c | 1 + drivers/scsi/scsi_priv.h | 1 + drivers/scsi/sd.c | 25 +++++++++ drivers/ufs/core/ufshcd.c | 40 +++++++++++++-- include/linux/blkdev.h | 10 ++++ include/scsi/scsi.h | 1 + include/scsi/scsi_driver.h | 1 + 16 files changed, 270 insertions(+), 10 deletions(-) create mode 100644 drivers/scsi/Kconfig.kunit create mode 100644 drivers/scsi/Makefile.kunit create mode 100644 drivers/scsi/scsi_error_test.c