From patchwork Mon May 24 11:19:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Avri Altman X-Patchwork-Id: 447714 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 B202DC04FF3 for ; Mon, 24 May 2021 11:23:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9806361132 for ; Mon, 24 May 2021 11:23:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232820AbhEXLZS (ORCPT ); Mon, 24 May 2021 07:25:18 -0400 Received: from esa1.hgst.iphmx.com ([68.232.141.245]:25908 "EHLO esa1.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232822AbhEXLZG (ORCPT ); Mon, 24 May 2021 07:25:06 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1621855418; x=1653391418; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=/s6BCmdFe94BsPWAzxEQXm732yJLke9N0JHym2keXOw=; b=d6Gi+NWLGmzm/r/9ouOdlIOjnflt0oafkm6kmjIHdqJni0u5kmxGFefi 9iV/OvpyswpmfKryVOpCKn1r+mWUcvu0eYnX7N2nd1OTPpuN0GF0RVccD bSpTkNoY0Em0jm4CwWPnZCj3RwBayKSugjSIci/fWTDR+4GcC0/XoMbzJ 4NtPWC/eHiK7o/Xg6XpwYHWyEUdxsWPR3+O6vr1iWZozskdn80o+eXgMs ec9hOPTIJ1iFQfHtvRg/CZKD0bcU4LOoBx3PMJY7SfgcbARkPFSHqO0st GwZ+aa+OK7ZWCehdhaGVfVbrxevgakt+Q3I4ZU1gt7O66f7elKUbIpCRd w==; IronPort-SDR: mWqcQ/nUVJ25VYUEe0jJ+toNzEUei6U0YNi+bDyqwMxc2ULuGYH/mftZjvxDDhLWoRH/oBcyKF J6fGjG7dPLt3kNnMjJLcIrUxwqxNUfvdYmEt+uUeAzJxER//nu51fmmbyPaYddbAEhByXfnvfH wENLpvuVa9H+6ppLjmTTVMMMBgM5WS6QleiPZbwWHuV0E8ZGxOq9TW56rUA4T1OF3ry3xUfOJK w1siOOlb2tWMOZ1Guqwb5MSZW5sscBZ+td+A4uvjo2RbThhy2LlKnaKYhf6RDOOBXIAVtjRv88 YA8= X-IronPort-AV: E=Sophos;i="5.82,319,1613404800"; d="scan'208";a="280526048" Received: from uls-op-cesaip01.wdc.com (HELO uls-op-cesaep01.wdc.com) ([199.255.45.14]) by ob1.hgst.iphmx.com with ESMTP; 24 May 2021 19:23:38 +0800 IronPort-SDR: 9gPs1dhjAkta5owBif/Iv2nw39JkuiNXghieGUHdIf2pE8elOLjgI2A5iTjFUO4I4bsGdwbtId rFoLDAWoxQPiewGvmHNbNSQK0AYfb21KZ5Vu092U4LBC2vezPdDMys9mvxjjjbsf+5hpEa8VDh Jxru/PhtVqPaHatGa1FY5nArsrKQtA20HRectWzDoCEOWKdAqqqy54PDM9Pybbpd5MDlnAHRYE PveGxZFbFn4sX/F4zAYUJIP8Ij1/mPiHL/ZxzgEXWmi9q8WZQohzSEfbOZk2RQENH+40kHe5LF NP9zQ7nvPcwMcGe9KmA7Zusy Received: from uls-op-cesaip01.wdc.com ([10.248.3.36]) by uls-op-cesaep01.wdc.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 May 2021 04:03:08 -0700 IronPort-SDR: igcV53kgduJ/oZu6zKjspEsepCr/mE2xWR5nZjyQc9UDEIzqwsoxHvS/C8uL9rD5NahukFuPVw rc4Po+8GvRh+XxaNjqnrXaPgdUppseZKEZfiCx6ccpZGXuHuTp6J1qcOR1gSAcYRp5SHlz/5me JOh/TLa3GbmMyHcNFCUdPs3mttm6vfHfOYwZPVLD8pcbgWro7acpeHG/E+4KVjYZZG5C7V1OSV htp4XAF3Lvackkwpo/N5myU0mg2Dyru5XCIKKZ/oNWh1EA1bHdWE0iZ/iHTxX4NpjPgN8cRTOl i1Y= WDCIronportException: Internal Received: from bxygm33.sdcorp.global.sandisk.com ([10.0.231.247]) by uls-op-cesaip01.wdc.com with ESMTP; 24 May 2021 04:23:34 -0700 From: Avri Altman To: "James E . J . Bottomley" , "Martin K . Petersen" , linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Cc: gregkh@linuxfoundation.org, Bart Van Assche , yongmyung lee , Daejun Park , alim.akhtar@samsung.com, asutoshd@codeaurora.org, Zang Leigang , Avi Shchislowski , Bean Huo , cang@codeaurora.org, stanley.chu@mediatek.com, Avri Altman Subject: [PATCH v9 08/12] scsi: ufshpb: Add "Cold" regions timer Date: Mon, 24 May 2021 14:19:09 +0300 Message-Id: <20210524111913.61303-9-avri.altman@wdc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210524111913.61303-1-avri.altman@wdc.com> References: <20210524111913.61303-1-avri.altman@wdc.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org In order not to hang on to “cold” regions, we shall inactivate a region that has no READ access for a predefined amount of time - READ_TO_MS. For that purpose we shall monitor the active regions list, polling it on every POLLING_INTERVAL_MS. On timeout expiry we shall add the region to the "to-be-inactivated" list, unless it is clean and did not exhaust its READ_TO_EXPIRIES - another parameter. All this does not apply to pinned regions. Signed-off-by: Avri Altman Reviewed-by: Daejun Park --- drivers/scsi/ufs/ufshpb.c | 74 +++++++++++++++++++++++++++++++++++++-- drivers/scsi/ufs/ufshpb.h | 8 +++++ 2 files changed, 79 insertions(+), 3 deletions(-) diff --git a/drivers/scsi/ufs/ufshpb.c b/drivers/scsi/ufs/ufshpb.c index 73e3fe89b5cc..e1b77c9e6284 100644 --- a/drivers/scsi/ufs/ufshpb.c +++ b/drivers/scsi/ufs/ufshpb.c @@ -18,6 +18,9 @@ #define ACTIVATION_THRESHOLD 8 /* 8 IOs */ #define EVICTION_THRESHOLD (ACTIVATION_THRESHOLD << 5) /* 256 IOs */ +#define READ_TO_MS 1000 +#define READ_TO_EXPIRIES 100 +#define POLLING_INTERVAL_MS 200 /* memory management */ static struct kmem_cache *ufshpb_mctx_cache; @@ -1030,12 +1033,63 @@ static int ufshpb_check_srgns_issue_state(struct ufshpb_lu *hpb, return 0; } +static void ufshpb_read_to_handler(struct work_struct *work) +{ + struct ufshpb_lu *hpb = container_of(work, struct ufshpb_lu, + ufshpb_read_to_work.work); + struct victim_select_info *lru_info = &hpb->lru_info; + struct ufshpb_region *rgn, *next_rgn; + unsigned long flags; + LIST_HEAD(expired_list); + + if (test_and_set_bit(TIMEOUT_WORK_RUNNING, &hpb->work_data_bits)) + return; + + spin_lock_irqsave(&hpb->rgn_state_lock, flags); + + list_for_each_entry_safe(rgn, next_rgn, &lru_info->lh_lru_rgn, + list_lru_rgn) { + bool timedout = ktime_after(ktime_get(), rgn->read_timeout); + + if (timedout) { + rgn->read_timeout_expiries--; + if (is_rgn_dirty(rgn) || + rgn->read_timeout_expiries == 0) + list_add(&rgn->list_expired_rgn, &expired_list); + else + rgn->read_timeout = ktime_add_ms(ktime_get(), + READ_TO_MS); + } + } + + spin_unlock_irqrestore(&hpb->rgn_state_lock, flags); + + list_for_each_entry_safe(rgn, next_rgn, &expired_list, + list_expired_rgn) { + list_del_init(&rgn->list_expired_rgn); + spin_lock_irqsave(&hpb->rsp_list_lock, flags); + ufshpb_update_inactive_info(hpb, rgn->rgn_idx); + spin_unlock_irqrestore(&hpb->rsp_list_lock, flags); + } + + ufshpb_kick_map_work(hpb); + + clear_bit(TIMEOUT_WORK_RUNNING, &hpb->work_data_bits); + + schedule_delayed_work(&hpb->ufshpb_read_to_work, + msecs_to_jiffies(POLLING_INTERVAL_MS)); +} + static void ufshpb_add_lru_info(struct victim_select_info *lru_info, struct ufshpb_region *rgn) { rgn->rgn_state = HPB_RGN_ACTIVE; list_add_tail(&rgn->list_lru_rgn, &lru_info->lh_lru_rgn); atomic_inc(&lru_info->active_cnt); + if (rgn->hpb->is_hcm) { + rgn->read_timeout = ktime_add_ms(ktime_get(), READ_TO_MS); + rgn->read_timeout_expiries = READ_TO_EXPIRIES; + } } static void ufshpb_hit_lru_info(struct victim_select_info *lru_info, @@ -1822,6 +1876,7 @@ static int ufshpb_alloc_region_tbl(struct ufs_hba *hba, struct ufshpb_lu *hpb) INIT_LIST_HEAD(&rgn->list_inact_rgn); INIT_LIST_HEAD(&rgn->list_lru_rgn); + INIT_LIST_HEAD(&rgn->list_expired_rgn); if (rgn_idx == hpb->rgns_per_lu - 1) { srgn_cnt = ((hpb->srgns_per_lu - 1) % @@ -1843,6 +1898,7 @@ static int ufshpb_alloc_region_tbl(struct ufs_hba *hba, struct ufshpb_lu *hpb) } rgn->rgn_flags = 0; + rgn->hpb = hpb; } return 0; @@ -2064,9 +2120,12 @@ static int ufshpb_lu_hpb_init(struct ufs_hba *hba, struct ufshpb_lu *hpb) INIT_LIST_HEAD(&hpb->list_hpb_lu); INIT_WORK(&hpb->map_work, ufshpb_map_work_handler); - if (hpb->is_hcm) + if (hpb->is_hcm) { INIT_WORK(&hpb->ufshpb_normalization_work, ufshpb_normalization_work_handler); + INIT_DELAYED_WORK(&hpb->ufshpb_read_to_work, + ufshpb_read_to_handler); + } hpb->map_req_cache = kmem_cache_create("ufshpb_req_cache", sizeof(struct ufshpb_req), 0, 0, NULL); @@ -2100,6 +2159,10 @@ static int ufshpb_lu_hpb_init(struct ufs_hba *hba, struct ufshpb_lu *hpb) ufshpb_stat_init(hpb); ufshpb_param_init(hpb); + if (hpb->is_hcm) + schedule_delayed_work(&hpb->ufshpb_read_to_work, + msecs_to_jiffies(POLLING_INTERVAL_MS)); + return 0; release_pre_req_mempool: @@ -2166,9 +2229,10 @@ static void ufshpb_discard_rsp_lists(struct ufshpb_lu *hpb) static void ufshpb_cancel_jobs(struct ufshpb_lu *hpb) { - if (hpb->is_hcm) + if (hpb->is_hcm) { + cancel_delayed_work_sync(&hpb->ufshpb_read_to_work); cancel_work_sync(&hpb->ufshpb_normalization_work); - + } cancel_work_sync(&hpb->map_work); } @@ -2276,6 +2340,10 @@ void ufshpb_resume(struct ufs_hba *hba) continue; ufshpb_set_state(hpb, HPB_PRESENT); ufshpb_kick_map_work(hpb); + if (hpb->is_hcm) + schedule_delayed_work(&hpb->ufshpb_read_to_work, + msecs_to_jiffies(POLLING_INTERVAL_MS)); + } } diff --git a/drivers/scsi/ufs/ufshpb.h b/drivers/scsi/ufs/ufshpb.h index b863540e28d6..448062a94760 100644 --- a/drivers/scsi/ufs/ufshpb.h +++ b/drivers/scsi/ufs/ufshpb.h @@ -115,6 +115,7 @@ struct ufshpb_subregion { }; struct ufshpb_region { + struct ufshpb_lu *hpb; struct ufshpb_subregion *srgn_tbl; enum HPB_RGN_STATE rgn_state; int rgn_idx; @@ -132,6 +133,10 @@ struct ufshpb_region { /* region reads - for host mode */ spinlock_t rgn_lock; unsigned int reads; + /* region "cold" timer - for host mode */ + ktime_t read_timeout; + unsigned int read_timeout_expiries; + struct list_head list_expired_rgn; }; #define for_each_sub_region(rgn, i, srgn) \ @@ -223,6 +228,9 @@ struct ufshpb_lu { /* for selecting victim */ struct victim_select_info lru_info; struct work_struct ufshpb_normalization_work; + struct delayed_work ufshpb_read_to_work; + unsigned long work_data_bits; +#define TIMEOUT_WORK_RUNNING 0 /* pinned region information */ u32 lu_pinned_start;