From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 87D7A23C4F3; Fri, 19 Sep 2025 16:08:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758298105; cv=none; b=jq7bWO0EBeqSSdueRBdq/Fbnu6RfoshKz3yaHLQg95gJN9v9BmoDvmGvRKPUAWtz8rjBmMCrvCUX6q7+NzjwbpiEZG8LdN/vGVtQIA47Mb0vwqpad14nmcZU/mcOqG+l1BUxkKs0TRFRV9+7DLpnV+QADkvvRBc/62fgNwr0fdE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758298105; c=relaxed/simple; bh=KR7+2nE82F6C0RiPmuqmiCYxfBNwhzjUQ6Re6K7PmkQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=kP7hh39fxv0P9Ur5m66GUvw/XTGzMByZZsmW/tM7RXY/mOp1i+FjN5HY6nnWjW7kNP2Ee2CmM0JHrb5QLd+rw0A0BYGcw6Pcg+kplV7/ELLUufKYJKsuGclGCmG3adNlDzRblWYXb+95Y/eThf8Zea1AorOa8qe45sYo992glfs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gxcwNWOd; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="gxcwNWOd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 76C8EC4CEF0; Fri, 19 Sep 2025 16:08:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1758298105; bh=KR7+2nE82F6C0RiPmuqmiCYxfBNwhzjUQ6Re6K7PmkQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=gxcwNWOdwyYYCt/Mr4IoNw/QjfiG4fCy9ykIixLtIZgzxpvEaTh0ZrsRzbEkVlnG2 m8b1wOyRgj64SHlplGanM4IqWdr6Ywznq35IYlrDTPSiuH1HbSJA9OSV6F3cLQ0fmv gIfqZUpL6QTaZY7lchfgfbbV/HzPQ9GlWuIYB09YAq8LPsugW8lRkDPp3pD3pmqfjH MMDTa/BarqpIPeeM6zxgfbm5MTp42dkz6/ahu8QcAFUE+eO/S+U7a/1bN3BopMvk86 +JRB492i+MxOTtI0yVlp8MJ781GY30PjuvtN+/6jEMPcnyQy8X2xhocLeJS5gf/FQl TeUW9JwC+yaOg== Date: Fri, 19 Sep 2025 10:08:21 -0600 From: Keith Busch To: Leon Romanovsky Cc: Marek Szyprowski , Jason Gunthorpe , Abdiel Janulgue , Alexander Potapenko , Alex Gaynor , Andrew Morton , Christoph Hellwig , Danilo Krummrich , David Hildenbrand , iommu@lists.linux.dev, Jason Wang , Jens Axboe , Joerg Roedel , Jonathan Corbet , Juergen Gross , kasan-dev@googlegroups.com, linux-block@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-nvme@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-trace-kernel@vger.kernel.org, Madhavan Srinivasan , Masami Hiramatsu , Michael Ellerman , "Michael S. Tsirkin" , Miguel Ojeda , Robin Murphy , rust-for-linux@vger.kernel.org, Sagi Grimberg , Stefano Stabellini , Steven Rostedt , virtualization@lists.linux.dev, Will Deacon , xen-devel@lists.xenproject.org Subject: Re: [PATCH v6 00/16] dma-mapping: migrate to physical address-based API Message-ID: References: <0db9bce5-40df-4cf5-85ab-f032c67d5c71@samsung.com> <20250912090327.GU341237@unreal> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250912090327.GU341237@unreal> On Fri, Sep 12, 2025 at 12:03:27PM +0300, Leon Romanovsky wrote: > On Fri, Sep 12, 2025 at 12:25:38AM +0200, Marek Szyprowski wrote: > > > > > > This series does the core code and modern flows. A followup series > > > will give the same treatment to the legacy dma_ops implementation. > > > > Applied patches 1-13 into dma-mapping-for-next branch. Let's check if it > > works fine in linux-next. > > Thanks a lot. Just fyi, when dma debug is enabled, we're seeing this new warning below. I have not had a chance to look into it yet, so I'm just reporting the observation. DMA-API: nvme 0006:01:00.0: cacheline tracking EEXIST, overlapping mappings aren't supported WARNING: kernel/dma/debug.c:598 at add_dma_entry+0x26c/0x328, CPU#1: (udev-worker)/773 Modules linked in: acpi_power_meter(E) loop(E) efivarfs(E) autofs4(E) CPU: 1 UID: 0 PID: 773 Comm: (udev-worker) Tainted: G E N 6.17.0-rc6-next-20250918-debug #6 PREEMPT(none) Tainted: [E]=UNSIGNED_MODULE, [N]=TEST pstate: 63400009 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : add_dma_entry+0x26c/0x328 lr : add_dma_entry+0x26c/0x328 sp : ffff80009fe0f460 x29: ffff80009fe0f470 x28: 0000000000000001 x27: 0000000000000001 x26: ffff8000835d7f38 x25: ffff8000835d7000 x24: ffff8000835d7e60 x23: 0000000000000000 x22: 0000000006e2cc00 x21: 0000000000000000 x20: ffff800082e8f218 x19: ffff0000a908ff80 x18: 00000000ffffffff x17: ffff8000801972a0 x16: ffff800080197054 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000004 x12: 0000000000020006 x11: 0000000030e4ef9f x10: ffff800083443358 x9 : ffff80008019499c x8 : 00000000fffeffff x7 : ffff800083443358 x6 : 0000000000000000 x5 : 00000000000bfff4 x4 : 0000000000000000 x3 : ffff0000bb005ac0 x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0000bb005ac0 Call trace: add_dma_entry+0x26c/0x328 (P) debug_dma_map_phys+0xc4/0xf0 dma_map_phys+0xe0/0x410 dma_map_page_attrs+0x94/0xf8 blk_dma_map_direct.isra.0+0x64/0xb8 blk_rq_dma_map_iter_next+0x6c/0xc8 nvme_prep_rq+0x894/0xa98 nvme_queue_rqs+0xb0/0x1a0 blk_mq_dispatch_queue_requests+0x268/0x3b8 blk_mq_flush_plug_list+0x90/0x188 __blk_flush_plug+0x104/0x170 blk_finish_plug+0x38/0x50 read_pages+0x1a4/0x3b8 page_cache_ra_unbounded+0x1a0/0x400 force_page_cache_ra+0xa8/0xd8 page_cache_sync_ra+0xa0/0x3f8 filemap_get_pages+0x104/0x950 filemap_read+0xf4/0x498 blkdev_read_iter+0x88/0x180 vfs_read+0x214/0x310 ksys_read+0x70/0x110 __arm64_sys_read+0x20/0x30 invoke_syscall+0x4c/0x118 el0_svc_common.constprop.0+0xc4/0xf0 do_el0_svc+0x24/0x38 el0_svc+0x1a0/0x340 el0t_64_sync_handler+0x98/0xe0 el0t_64_sync+0x17c/0x180 ---[ end trace 0000000000000000 ]---