Date: Mon, 29 Apr 2019 16:24:13 -0400 From: Tycho Nightingale <tychon@freebsd.org> To: Niclas Zeising <zeising@freebsd.org> Cc: "freebsd-x11@freebsd.org" <freebsd-x11@freebsd.org>, Johannes Lundberg <johalun@FreeBSD.org> Subject: Re: dmar, dma_pool, etc Message-ID: <9E61210C-4939-4D3A-8110-72023B67BBE6@freebsd.org> In-Reply-To: <23fe1183-d12c-b4b8-958f-34cee6e33977@freebsd.org> References: <e0415524-3126-5ea2-c2e2-3d3dccc6832e@FreeBSD.org> <9E2356CF-6483-4C06-B4A8-0120088063FE@freebsd.org> <60b447bb-81da-4c01-e164-bdf10e5560b0@freebsd.org> <594E1E71-6834-431E-B122-005E64EDB1C2@freebsd.org> <3a07ffef-a978-2fdd-8d54-85fc0b6f3a63@freebsd.org> <23fe1183-d12c-b4b8-958f-34cee6e33977@freebsd.org>
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Hi, > On Apr 29, 2019, at 2:34 PM, Niclas Zeising <zeising@freebsd.org> = wrote: >=20 > On 2019-04-29 20:27, Niclas Zeising wrote: >> On 2019-04-29 18:00, Tycho Nightingale wrote: >>>> On Apr 29, 2019, at 11:06 AM, Niclas Zeising <zeising@FreeBSD.org> = wrote: >>>>=20 >>>> As a side note, I can readily reproduce the hang on a spare laptop, = please let me know if I can help in testing or diagnosing in any way. >>>=20 >>>=20 >>> If you can readily reproduce the hang, since there are 2 halves that = comprised the fix (the DMA pool and non-pool mappings) it would be = instructive to try reverting either dmapool.h or dma-mapping.h = independently to see if that helps. >>>=20 >> Hi! >> I will test this and report back. Thank you! >> Regards >=20 > Hi! > Just reverting dmapool.h or dma-mapping.h doesn't work, it won't = build. I need to revert more than that. Can you help me figure out what = to revert in either case, or provide a patch? Thanks for trying. I managed to setup my HW and reproduce this and I = see your point that it doesn=E2=80=99t cleave in half perfectly. Since I=E2=80=99ve got a (non)-working test case, let me investigate a = bit further. Tycho
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