On 2020-09-21 6:24 p.m., Lu Baolu wrote: >>>> I'm trying to test this on an old Sandy Bridge, but found that I get >>>> spammed with warnings on boot. I've put a sample of a few of them below. >>>> They all seem to be related to ioat. >>>> >>>> I had the same issue with Tom's v2 but never saw this on his v1. >>> >>> Have you verified whether this could be reproduced with the lasted >>> upstream kernel (without this patch series)? >> >> Yes. > > I am sorry. Just want to make sure I understand you correctly. :-) When > you say "yes", do you mean you could reproduce this with pure upstream > kernel (5.9-rc6)? I mean I've verified the bug does *not* exist without this patch set. > >> Also, it's hitting a warning in the dma-iommu code which would not >> be hit without this patch set. > > Without this series, DMA APIs don't go through dma-iommu. Do you mind > posting the warning message? It was on my original email but here it is again: [ 44.057877] ------------[ cut here ]------------ [ 44.063167] WARNING: CPU: 4 PID: 84 at drivers/iommu/dma-iommu.c:496 __iommu_dma_unmap+0x115/0x130 [ 44.073351] Modules linked in: [ 44.076882] CPU: 4 PID: 84 Comm: kworker/4:1 Tainted: G W 5.9.0-rc4-00006-g110da1e703a2 #216 [ 44.087935] Hardware name: Supermicro SYS-7047GR-TRF/X9DRG-QF, BIOS 3.0a 12/05/2013 [ 44.096650] Workqueue: events work_for_cpu_fn [ 44.101644] RIP: 0010:__iommu_dma_unmap+0x115/0x130 [ 44.107225] Code: 48 8b 0c 24 48 c7 44 24 10 00 00 00 00 48 c7 44 24 18 00 00 00 00 48 c7 44 24 20 00 00 00 00 48 c7 44 24 08 ff ff ff ff eb 8d <0f> 0b e9 74 ff ff ff e8 1f 36 66 00 66 66 2e 0f 1f 84 00 00 00 00 [ 44.128443] RSP: 0000:ffffc90002397c38 EFLAGS: 00010206 [ 44.134413] RAX: 0000000000200000 RBX: 0000000000080000 RCX: 0000000000000000 [ 44.144487] RDX: 0000000000000403 RSI: ffffffff82a7fb20 RDI: ffff888477804f30 [ 44.152613] RBP: 00000000fec00000 R08: 00000000000fec00 R09: 00000000000fedff [ 44.160733] R10: 0000000000000002 R11: 0000000000000004 R12: ffff888270c39000 [ 44.168861] R13: ffff888472d85ee8 R14: 0000000000080000 R15: 0000000000000000 [ 44.176980] FS: 0000000000000000(0000) GS:ffff888479800000(0000) knlGS:0000000000000000 [ 44.186198] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.192761] CR2: 0000000000000000 CR3: 0000000002a20001 CR4: 00000000000606e0 [ 44.200871] Call Trace: [ 44.203716] ? lockdep_hardirqs_on_prepare+0xad/0x180 [ 44.209509] iommu_dma_free+0x18/0x30 [ 44.213734] ioat_free_chan_resources+0x19e/0x300 [ 44.219133] ioat_dma_self_test+0x2a0/0x3d0 [ 44.223964] ioat_pci_probe+0x60e/0x903 [ 44.228387] local_pci_probe+0x42/0x80 [ 44.232721] work_for_cpu_fn+0x16/0x20 [ 44.237037] process_one_work+0x292/0x630 [ 44.241644] ? __schedule+0x344/0x970 [ 44.245868] worker_thread+0x227/0x3e0 [ 44.250185] ? process_one_work+0x630/0x630 [ 44.254989] kthread+0x136/0x150 [ 44.258718] ? kthread_use_mm+0x100/0x100 [ 44.263334] ret_from_fork+0x22/0x30 [ 44.267474] irq event stamp: 1881262 [ 44.271602] hardirqs last enabled at (1881272): [<ffffffff811b8465>] console_unlock+0x435/0x570 [ 44.281593] hardirqs last disabled at (1881281): [<ffffffff811b845b>] console_unlock+0x42b/0x570 [ 44.291588] softirqs last enabled at (1747140): [<ffffffff817da3e5>] ioat_cleanup+0x65/0x470 [ 44.301285] softirqs last disabled at (1747144): [<ffffffff817d797a>] ioat_free_chan_resources+0x6a/0x300 [ 44.312153] ---[ end trace ed0f88fd959a5a39 ]--- _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
