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=-13.6 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,URIBL_BLOCKED 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 3B02AC4338F for ; Fri, 6 Aug 2021 12:48:35 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E943F611C5 for ; Fri, 6 Aug 2021 12:48:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org E943F611C5 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id B29D583BC9; Fri, 6 Aug 2021 12:48:34 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 7xVKlnyvwfwR; Fri, 6 Aug 2021 12:48:34 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp1.osuosl.org (Postfix) with ESMTPS id 543B983B91; Fri, 6 Aug 2021 12:48:33 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 3BFF6C001A; Fri, 6 Aug 2021 12:48:33 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [IPv6:2605:bc80:3010::138]) by lists.linuxfoundation.org (Postfix) with ESMTP id 84FA1C000E for ; Fri, 6 Aug 2021 12:48:31 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id 74A4483BC5 for ; Fri, 6 Aug 2021 12:48:31 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id VzFknnkqCAVP for ; Fri, 6 Aug 2021 12:48:30 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by smtp1.osuosl.org (Postfix) with ESMTPS id C3D3283B91 for ; Fri, 6 Aug 2021 12:48:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1628254109; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=BFeBqOXfkyt43N/bfzc7r20R6enM8cPml+FtmtRNnCk=; b=LemyeBI/qkzSRZ522F2ds1gkTyFVHpM3kMD7eO5Iy9jd7FXksFP/E+5OadFH6vQpyk2KEC eyLhtyQw59sOHEZ7iWOrh4KGK1VcFIp5WUrBASuAOmdpqBx4vU+2UfmGli4hwlYLTJ6QGG r9d3oezBy7jXG/Fc1vMOtsuOYAQozyg= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-126-4zB_OUpUOfiCyMBukTa9Hg-1; Fri, 06 Aug 2021 08:48:26 -0400 X-MC-Unique: 4zB_OUpUOfiCyMBukTa9Hg-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 4824D8042EB; Fri, 6 Aug 2021 12:48:24 +0000 (UTC) Received: from t480s.redhat.com (unknown [10.39.192.224]) by smtp.corp.redhat.com (Postfix) with ESMTP id E5B715D6A1; Fri, 6 Aug 2021 12:48:18 +0000 (UTC) From: David Hildenbrand To: linux-kernel@vger.kernel.org Subject: [PATCH v3 6/9] dax/kmem: use a single static memory group for a single probed unit Date: Fri, 6 Aug 2021 14:47:12 +0200 Message-Id: <20210806124715.17090-7-david@redhat.com> In-Reply-To: <20210806124715.17090-1-david@redhat.com> References: <20210806124715.17090-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Cc: Wei Yang , "Michael S. Tsirkin" , Dave Hansen , virtualization@lists.linux-foundation.org, linux-mm@kvack.org, linux-acpi@vger.kernel.org, Len Brown , Pavel Tatashin , Anshuman Khandual , Dan Williams , Michal Hocko , Vlastimil Babka , Oscar Salvador , Pankaj Gupta , Greg Kroah-Hartman , "Rafael J. Wysocki" , Hui Zhu , Andrew Morton , Marek Kedzierski , Mike Rapoport X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" Although dax/kmem users often disable auto-onlining and instead online memory manually (usually to ZONE_MOVABLE), there is still value in having auto-onlining be aware of the relationship of memory blocks. Let's treat one probed unit as a single static memory device, similar to a single ACPI memory device. Signed-off-by: David Hildenbrand --- drivers/dax/kmem.c | 40 ++++++++++++++++++++++++++++++++-------- 1 file changed, 32 insertions(+), 8 deletions(-) diff --git a/drivers/dax/kmem.c b/drivers/dax/kmem.c index 99e0f60c4c26..a37622060fff 100644 --- a/drivers/dax/kmem.c +++ b/drivers/dax/kmem.c @@ -37,15 +37,16 @@ static int dax_kmem_range(struct dev_dax *dev_dax, int i, struct range *r) struct dax_kmem_data { const char *res_name; + int mgid; struct resource *res[]; }; static int dev_dax_kmem_probe(struct dev_dax *dev_dax) { struct device *dev = &dev_dax->dev; + unsigned long total_len = 0; struct dax_kmem_data *data; - int rc = -ENOMEM; - int i, mapped = 0; + int i, rc, mapped = 0; int numa_node; /* @@ -61,24 +62,44 @@ static int dev_dax_kmem_probe(struct dev_dax *dev_dax) return -EINVAL; } + for (i = 0; i < dev_dax->nr_range; i++) { + struct range range; + + rc = dax_kmem_range(dev_dax, i, &range); + if (rc) { + dev_info(dev, "mapping%d: %#llx-%#llx too small after alignment\n", + i, range.start, range.end); + continue; + } + total_len += range_len(&range); + } + + if (!total_len) { + dev_warn(dev, "rejecting DAX region without any memory after alignment\n"); + return -EINVAL; + } + data = kzalloc(struct_size(data, res, dev_dax->nr_range), GFP_KERNEL); if (!data) return -ENOMEM; + rc = -ENOMEM; data->res_name = kstrdup(dev_name(dev), GFP_KERNEL); if (!data->res_name) goto err_res_name; + rc = memory_group_register_static(numa_node, total_len); + if (rc < 0) + goto err_reg_mgid; + data->mgid = rc; + for (i = 0; i < dev_dax->nr_range; i++) { struct resource *res; struct range range; rc = dax_kmem_range(dev_dax, i, &range); - if (rc) { - dev_info(dev, "mapping%d: %#llx-%#llx too small after alignment\n", - i, range.start, range.end); + if (rc) continue; - } /* Region is permanently reserved if hotremove fails. */ res = request_mem_region(range.start, range_len(&range), data->res_name); @@ -108,8 +129,8 @@ static int dev_dax_kmem_probe(struct dev_dax *dev_dax) * Ensure that future kexec'd kernels will not treat * this as RAM automatically. */ - rc = add_memory_driver_managed(numa_node, range.start, - range_len(&range), kmem_name, MHP_NONE); + rc = add_memory_driver_managed(data->mgid, range.start, + range_len(&range), kmem_name, MHP_NID_IS_MGID); if (rc) { dev_warn(dev, "mapping%d: %#llx-%#llx memory add failed\n", @@ -129,6 +150,8 @@ static int dev_dax_kmem_probe(struct dev_dax *dev_dax) return 0; err_request_mem: + memory_group_unregister(data->mgid); +err_reg_mgid: kfree(data->res_name); err_res_name: kfree(data); @@ -171,6 +194,7 @@ static void dev_dax_kmem_remove(struct dev_dax *dev_dax) } if (success >= dev_dax->nr_range) { + memory_group_unregister(data->mgid); kfree(data->res_name); kfree(data); dev_set_drvdata(dev, NULL); -- 2.31.1 _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization