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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 22108C433EF for ; Mon, 1 Nov 2021 16:28:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0B79561101 for ; Mon, 1 Nov 2021 16:28:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232630AbhKAQbT (ORCPT ); Mon, 1 Nov 2021 12:31:19 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:58867 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232643AbhKAQbR (ORCPT ); Mon, 1 Nov 2021 12:31:17 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1635784124; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=vSSeiEsgy4ZRAwPPYMh123Zf4LHs8XHr2NNVii6Qq7o=; b=B/NwU0o58fLXbTMlti+I7ffXdMsWyQ5HnLkEYk1alyJsBxTQFKspG6psJxtmt+6ECOC5cW UD4FTDgJwz0+/ryyjycKK5Uxd7cFPD3S0lXeEz7wfNnZFMBl3fcZevgLSMseytbMjfYvhs m3nk1wSUGhiPorTh+hc0J/KzjXG1vtw= Received: from mail-qk1-f199.google.com (mail-qk1-f199.google.com [209.85.222.199]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-380-pqc7XfgINHSV9dB9sefrRw-1; Mon, 01 Nov 2021 12:28:41 -0400 X-MC-Unique: pqc7XfgINHSV9dB9sefrRw-1 Received: by mail-qk1-f199.google.com with SMTP id bl10-20020a05620a1a8a00b004624f465b6eso10829881qkb.22 for ; Mon, 01 Nov 2021 09:28:40 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=vSSeiEsgy4ZRAwPPYMh123Zf4LHs8XHr2NNVii6Qq7o=; b=b9xN4z3lu3HVkYP1yW7wxH187cr5huHGi6MsKf0AQJvUakJanNK7AzwMztfX7nqAUw onCZBKSis0p+ECo3Ehu4CpBfpSqXrlPKUKTPs9TnA9Wkaw45kF541zGmRxFN5e+jCl1g Wtcvw1KXrTIlcILmnKK5v3G0x3aEJHy5Ydh+spDbDm//c9ba4BgtjSe9NgLI5eHtoEz7 e0irVJclvrnZAInHn2y4Wu9aQpUsOF+G0g1/uL+thWbJlT6XabHdR3AojVFFhvt2Tn8A BNjvRVceoZM4jJ/ZdcquBnhIw9zAYZUK1UG0qyi/CvXLPmU4+6veuwQOOHHcXWWt40jx DZ0g== X-Gm-Message-State: AOAM531XPFLRNdWLIoTwWtQvHpS8e2krxm4uGMC44DnxLh+T5ytJMCSA BodH1Z2iJJwF3veqrmgCKD7oBaSrDpYkHvxaayCaby/OseEa7/QzMxxJZojzYlhsN40q2/RNbU2 fXS/mjST5IWQqQEu7Ym/cVi/B X-Received: by 2002:a05:6214:e4a:: with SMTP id o10mr29863859qvc.58.1635784120280; Mon, 01 Nov 2021 09:28:40 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwnnToYfIdlwewHO/8stJwOwIrIwZDJizj1Vl7BOinzg8bNzbcfCyJ9R9K4APUV9a9jX59VOw== X-Received: by 2002:a05:6214:e4a:: with SMTP id o10mr29863844qvc.58.1635784120140; Mon, 01 Nov 2021 09:28:40 -0700 (PDT) Received: from localhost (pool-68-160-176-52.bstnma.fios.verizon.net. [68.160.176.52]) by smtp.gmail.com with ESMTPSA id u185sm10250817qkd.48.2021.11.01.09.28.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Nov 2021 09:28:39 -0700 (PDT) Date: Mon, 1 Nov 2021 12:28:38 -0400 From: Mike Snitzer To: Christoph Hellwig Cc: Dan Williams , Ira Weiny , dm-devel@redhat.com, linux-xfs@vger.kernel.org, nvdimm@lists.linux.dev, linux-s390@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org, virtualization@lists.linux-foundation.org Subject: Re: [PATCH 03/11] dax: simplify the dax_device <-> gendisk association Message-ID: References: <20211018044054.1779424-1-hch@lst.de> <20211018044054.1779424-4-hch@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211018044054.1779424-4-hch@lst.de> Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Mon, Oct 18 2021 at 12:40P -0400, Christoph Hellwig wrote: > Replace the dax_host_hash with an xarray indexed by the pointer value > of the gendisk, and require explicitl calls from the block drivers that > want to associate their gendisk with a dax_device. > > Signed-off-by: Christoph Hellwig ... > diff --git a/drivers/md/dm.c b/drivers/md/dm.c > index 79737aee516b1..a0a4703620650 100644 > --- a/drivers/md/dm.c > +++ b/drivers/md/dm.c > @@ -1683,6 +1683,7 @@ static void cleanup_mapped_device(struct mapped_device *md) > bioset_exit(&md->io_bs); > > if (md->dax_dev) { > + dax_remove_host(md->disk); > kill_dax(md->dax_dev); > put_dax(md->dax_dev); > md->dax_dev = NULL; > @@ -1784,10 +1785,11 @@ static struct mapped_device *alloc_dev(int minor) > sprintf(md->disk->disk_name, "dm-%d", minor); > > if (IS_ENABLED(CONFIG_FS_DAX)) { > - md->dax_dev = alloc_dax(md, md->disk->disk_name, > - &dm_dax_ops, 0); > + md->dax_dev = alloc_dax(md, &dm_dax_ops, 0); > if (IS_ERR(md->dax_dev)) > goto bad; > + if (dax_add_host(md->dax_dev, md->disk)) > + goto bad; > } > > format_dev_t(md->name, MKDEV(_major, minor)); Acked-by: Mike Snitzer