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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: <20250920155352.GH10800@unreal> References: <0db9bce5-40df-4cf5-85ab-f032c67d5c71@samsung.com> <20250912090327.GU341237@unreal> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Stat-Signature: 1mbz9rnnohiae4bugu7goxw16c4a4q5n X-Rspam-User: X-Rspamd-Queue-Id: 5D57F180011 X-Rspamd-Server: rspam04 X-HE-Tag: 1758383638-407763 X-HE-Meta: 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 y3gC/M1V 7m8OY4E6QFJGsuohXH0IT84asdQ9IIV2qd4zku5wVNUCxaUKujKDOtgwVLUsCJ+VF1vITNe+uhnYVPkAbdYZ/MRH/89l9OGM47Rd3VxQZeAmIBOrTDmSTfsmaCowiLS4eDZ9XNzVq/aHBF7GpHHciAcF75sdBVU6xn4OIyOQRuqC2ziwbZR1H0ot3phS5G/zzIYh7231oP+DB2ooBCLmQ0Bw0GZCAx8aJGYmeuauAlSRlT45uMCy4YlCd+5RDFbUfe7rmiEzQ3llD6zWM+T4RtkDox2RGSWgf8Dvw3Ppa019MDqYnBOHXS2B9bFnQbeKvupBy X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Sep 19, 2025 at 10:08:21AM -0600, Keith Busch wrote: > 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. Did you apply all patches or only Marek's branch? I don't get this warning when I run my NVMe tests on current dmabuf-vfio branch. Thanks > > 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 ]--- > >