From nobody Sat Sep 06 15:19:31 2025 X-Original-To: freebsd-current@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4cJxj03Tdpz66kht for ; Sat, 06 Sep 2025 15:19:48 +0000 (UTC) (envelope-from rick.macklem@gmail.com) Received: from mail-ed1-x52d.google.com (mail-ed1-x52d.google.com [IPv6:2a00:1450:4864:20::52d]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "WR4" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4cJxj01DmRz3pZT for ; Sat, 06 Sep 2025 15:19:48 +0000 (UTC) (envelope-from rick.macklem@gmail.com) Authentication-Results: mx1.freebsd.org; none Received: by mail-ed1-x52d.google.com with SMTP id 4fb4d7f45d1cf-625f7457475so673136a12.0 for ; Sat, 06 Sep 2025 08:19:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1757171985; x=1757776785; darn=freebsd.org; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=DJV1zWbJFb/mt39omaBW7vPNby8h20L2vseroJY1byo=; b=HVEXPCB9aIYsR+omYtab8HSiQoCwoOCSEX6W8tE21khnSrPNxozQeLtlnl4YrfOThT GkPPCjaX5Iu4aVDEd3Nuy7/KMRvO9G7EURqF80gIGwb5bHDlDet6TfFPMbXeZL5MCs21 8APlsk6GWiCFcPkUxmVBsq9RziN/5hWD48pXX0epio3YXY+Mth1OxqxHc+gLIhm8gk4q /md0zj4oItXD3XMrQwoG4t61LvH9NvwXe9bgjLbSg4u7Tc1qlCGlOorNqhAUWGjiIQKs BQ4o5wQ5l3fp7GzaRId269Vz9lOxIsyAwmjAvzzmSAelOEv0g5ObQZFKxi/Bc7jZ8nEw eKNA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1757171985; x=1757776785; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=DJV1zWbJFb/mt39omaBW7vPNby8h20L2vseroJY1byo=; b=itSvnBGQzseaYosnunzc1nvHcB7FlrcJycwvWpZ/nrM9CWYe7RQA0HEDErzptnfXFX LmQpJLGn3Roe/KJ1EEWxCyS2PeG/fz7NoqWeBVZ0KgPjdsrrNPSmUh2B8vBFOZhhEUq/ DzCAA/Cb9/FkUP/hHJZl/sj9DgtNyRzoy0o2rs4WxT9dUVntT794l5zDAPuk4ARclokW JdbNE63JKtL6J5wENXTmdEVDPQoL6bkj1Z/1/6kdxsQ8qe+IAF7okIYepav5VPr2ACJU +Rw5yNKKwXeKVNFD3JHUIf4m2Kf21pn1KDah/pVWo7NEvW/XezGOUyppd0tE69iF352g NHSg== X-Gm-Message-State: AOJu0YxGQJQD0+4fz50zbhhwuMipxF/XzDstImYqg4RJhDEzT2ezWnAy +dwtZ9W3pzSGXJOAhq/cU+LeeFom5ziwGn+8R81J6hPYHgxCJaXBnSl00jqwUPFw4IzuuuuR/MR FV7pVhiCtu3k2KjPGxwJusbteOytXsg== X-Gm-Gg: ASbGncu6gwi6+QfXp2x9IXOAFSh6EVVbnK3J2s5gpwxJZUwReEDL+bF7Zr5xOAp0iGN xMSorhpi86YnKftsixcagQt8ubHxk23DQw31YjBK9XL2nYLwCBBBq4vjnRLj4gCJp9FLj/nD7gV 4AL/YD72O8KbDDpDAq87Yo5U9LeerMoZhUxIOKOx7NFR9sOlwSrlTKa6Qrllxw0QRW3Y2aUXsxe 3Bk2KP4NH7uf0stXLTdtEDrD6al4Jx42gy4KSXvg/t8lNUJyQ== X-Google-Smtp-Source: AGHT+IHiyKCQSwVK+4MXn/fyKazg6rKiIarmHFSb4Zuu6jCyl0embX5pDKNusbcp1AoiwsEFZ7CzaAV2nn3smdx6Lk0= X-Received: by 2002:a05:6402:5208:b0:61d:1d16:19b1 with SMTP id 4fb4d7f45d1cf-62373df6640mr2282660a12.14.1757171985030; Sat, 06 Sep 2025 08:19:45 -0700 (PDT) List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@FreeBSD.org MIME-Version: 1.0 References: <20250906142106.BEC45282@slippy.cwsent.com> In-Reply-To: <20250906142106.BEC45282@slippy.cwsent.com> From: Rick Macklem Date: Sat, 6 Sep 2025 08:19:31 -0700 X-Gm-Features: Ac12FXwB96hj2XzEkwbI37Rti2OEpeUVrXiGUnyNYARRrNuNOrEea6K2L0sdKfU Message-ID: Subject: Re: Discuss Bug 289320 - graphics/drm-66-kmod: Page fault on 16-CURRENT To: Cy Schubert Cc: freebsd-current@freebsd.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Spamd-Bar: ---- X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; TAGGED_FROM(0.00)[]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US] X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Rspamd-Queue-Id: 4cJxj01DmRz3pZT On Sat, Sep 6, 2025 at 7:21=E2=80=AFAM Cy Schubert wrote: > > Hi, > > I'd like to open up discussion about a weird bug I stumbled across on > Thursday. You can get the gory details, including backtrace in PR/289320. > > Long story short, after the FreeBSD version bump from 15 to 16 amdgpu > panics on a kernel page fault. For fun I reverted, locally, the commit th= at > updated the version strings in FreeBSD-CURRENT from 15 to 16, reverting > 8b4e4c2737305df8807abc6cd054a32586085c93 on that particular machine, a > Framework 13 laptop. The panic was solved. > > My other machines don't use amdgpu, they either don't use X or in the cas= e > of my HP 840, it uses the i915 driver (also part of drm-66-kmod), which > works after the 15 to 16 version bump. But the 15 to 16 version bump caus= es > amdgpu also from drm-66-kmod to reference a NULL pointer. > > What in drm-66-kmod would be sensitive to a FreeBSD version bump? Blame it on quantum entanglement.. One a slightly more serious note, I'd grep for uses of MODULE_KERNEL_MAXVER in the sources as a starting point. rick > > > -- > Cheers, > Cy Schubert > FreeBSD UNIX: Web: https://FreeBSD.org > NTP: Web: https://nwtime.org > > e**(i*pi)+1=3D0 > > >