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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> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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 ]--- > >