From patchwork Thu Oct 5 19:40:49 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: 13410678 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 41D1CE92734 for ; Thu, 5 Oct 2023 19:42:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231357AbjJETmA (ORCPT ); Thu, 5 Oct 2023 15:42:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36482 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231563AbjJETl6 (ORCPT ); Thu, 5 Oct 2023 15:41:58 -0400 Received: from mail-pj1-f53.google.com (mail-pj1-f53.google.com [209.85.216.53]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8491CF0; Thu, 5 Oct 2023 12:41:52 -0700 (PDT) Received: by mail-pj1-f53.google.com with SMTP id 98e67ed59e1d1-2774f6943b1so1030771a91.0; Thu, 05 Oct 2023 12:41:52 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1696534912; x=1697139712; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=GnAe32dYKZLNlv2gocadcxlV/sPR0ItiYTGrPBtdmto=; b=fnUCrWOI3JzKYOI0ZGyafgMvpFHhHx6Uwof7dcB+DKwNyaKI9n5w0AIYtN3eZCZPjL zJEH1rzNVAXFCTT/7+0Ftst4L4a/YLA/ia14tmrqntgYiVzrZ6MA6VZml98STVnD42WU lA40gp2NleT4Kb3GEiLzUqd5PR1ODSZFFl5g0Itiq+NhavLWRyd5XOzHZQ3b15S78Ikz yOSHmJgdZjxDD6dMJXIrTQ49B2qD/Ujdrn02B4g7LmWujnAeb5TwF0gOYypg6jmfS2Y0 +QhFErcDkrOtFIR/yNnpj6wyaGGWHj3GinMlRknkPzOrmPuWsx9EHuuEhE/iQGEgH1SK AXGg== X-Gm-Message-State: AOJu0YziOGeLrr2SDNP4jd7elj71Nk3vVoh8P36lfnZtzQUAzbtYKVro PVjuQOLH2a1X7nVl2KeLkyJihMYc+PE= X-Google-Smtp-Source: AGHT+IFKE1pVgjMbJaLnP0EVrkCOHRLrNhJtCUJDxDkl8j5QA/IRLCtN5uRtcDaBG1pjj9sVNPHaCw== X-Received: by 2002:a17:90b:1489:b0:279:2e9a:c425 with SMTP id js9-20020a17090b148900b002792e9ac425mr6077244pjb.1.1696534911823; Thu, 05 Oct 2023 12:41:51 -0700 (PDT) Received: from bvanassche-linux.mtv.corp.google.com ([2620:15c:211:201:ca3e:70ef:bad:2f]) by smtp.gmail.com with ESMTPSA id u4-20020a170902e5c400b001a9b29b6759sm2129596plf.183.2023.10.05.12.41.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 Oct 2023 12:41:51 -0700 (PDT) From: Bart Van Assche To: Jens Axboe Cc: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org, "Martin K . Petersen" , Christoph Hellwig , Niklas Cassel , Avri Altman , Bean Huo , Daejun Park , Bart Van Assche , Damien Le Moal , Niklas Cassel , Hannes Reinecke Subject: [PATCH v2 03/15] block: Support data lifetime in the I/O priority bitfield Date: Thu, 5 Oct 2023 12:40:49 -0700 Message-ID: <20231005194129.1882245-4-bvanassche@acm.org> X-Mailer: git-send-email 2.42.0.609.gbb76f46606-goog In-Reply-To: <20231005194129.1882245-1-bvanassche@acm.org> References: <20231005194129.1882245-1-bvanassche@acm.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org The NVMe and SCSI standards define 64 different data lifetimes. Support storing this information in the I/O priority bitfield. The current allocation of the 16 bits in the I/O priority bitfield is as follows: * 15..13: I/O priority class * 12..6: unused * 5..3: I/O hint (CDL) * 2..0: I/O priority level This patch changes this into the following: * 15..13: I/O priority class * 12: unused * 11..6: data lifetime * 5..3: I/O hint (CDL) * 2..0: I/O priority level Cc: Damien Le Moal Cc: Niklas Cassel Signed-off-by: Bart Van Assche --- include/uapi/linux/ioprio.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/include/uapi/linux/ioprio.h b/include/uapi/linux/ioprio.h index bee2bdb0eedb..efe9bc450872 100644 --- a/include/uapi/linux/ioprio.h +++ b/include/uapi/linux/ioprio.h @@ -71,7 +71,7 @@ enum { * class and level. */ #define IOPRIO_HINT_SHIFT IOPRIO_LEVEL_NR_BITS -#define IOPRIO_HINT_NR_BITS 10 +#define IOPRIO_HINT_NR_BITS 3 #define IOPRIO_NR_HINTS (1 << IOPRIO_HINT_NR_BITS) #define IOPRIO_HINT_MASK (IOPRIO_NR_HINTS - 1) #define IOPRIO_PRIO_HINT(ioprio) \ @@ -102,6 +102,12 @@ enum { IOPRIO_HINT_DEV_DURATION_LIMIT_7 = 7, }; +#define IOPRIO_LIFETIME_SHIFT (IOPRIO_HINT_SHIFT + IOPRIO_HINT_NR_BITS) +#define IOPRIO_LIFETIME_NR_BITS 6 +#define IOPRIO_LIFETIME_MASK ((1u << IOPRIO_LIFETIME_NR_BITS) - 1) +#define IOPRIO_PRIO_LIFETIME(ioprio) \ + ((ioprio >> IOPRIO_LIFETIME_SHIFT) & IOPRIO_LIFETIME_MASK) + #define IOPRIO_BAD_VALUE(val, max) ((val) < 0 || (val) >= (max)) /*