From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from xry111.site (xry111.site [89.208.246.23]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EB31615E97 for ; Sat, 21 Sep 2024 07:56:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=89.208.246.23 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726905386; cv=none; b=Y51PgKZ94GfgvlTPjUtd96buTskIx398QukfIItKOoiMLYT+KQgRhWFLicUJuuyz61qQJQnVVX+Ji/DdVl5vFnBgVx60TYl0w9L72Ert57zch4gb0GRGbSzCyz/rcS0MsBtTwNJtXHEUAXbKdyyjC6EDIuZuJ3HYvY70b9oeAII= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726905386; c=relaxed/simple; bh=IA+wM59KgilMHvG0jWyMMct10R/+PHODryPdpvVdz6M=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=RsXhgV3qhQ8L0bLfOhR7C0AqBxDtuPj9/H0q10GJbafmuwDEHwiYEcQ85SASqXgSBYXIJp5pjAkHkyjmPe0p7jMBbVrLnWN83GgIfGmK0T5HTX12Zf8WY0iiX2aP3acs0aXaq/1So/rnR3+1AtSETDiR9wJheVv1v9R5z9y0gQA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=xry111.site; spf=pass smtp.mailfrom=xry111.site; dkim=pass (1024-bit key) header.d=xry111.site header.i=@xry111.site header.b=Vf5j3SRr; arc=none smtp.client-ip=89.208.246.23 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=xry111.site Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=xry111.site Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=xry111.site header.i=@xry111.site header.b="Vf5j3SRr" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=xry111.site; s=default; t=1726905377; bh=jAkLGM/lyQa3sExpXVoRFmK9scx17Ch6bL+pFETgyVc=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=Vf5j3SRrEJpHEbslAe92R4BsVoYXO9hJyRUW3CiyUiuDXer45bpVeRDumX2bCFG66 rloLnkAKqOBuTb31U/NDDIycokLbTMnlOO16q8j4oSVIwM0XckpDvUSphs3NE15JU7 BZSPsrKpLsWpsH3/rYrSVPt0k4QkNdyzNM6/Mn3A= Received: from [IPv6:240e:358:11d4:4800:dc73:854d:832e:6] (unknown [IPv6:240e:358:11d4:4800:dc73:854d:832e:6]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (prime256v1) server-signature ECDSA (secp384r1) server-digest SHA384) (Client did not present a certificate) (Authenticated sender: xry111@xry111.site) by xry111.site (Postfix) with ESMTPSA id 725271A4029; Sat, 21 Sep 2024 03:56:15 -0400 (EDT) Message-ID: <9a84a7c6f943209cc87a54075ed22df37ebda5f8.camel@xry111.site> Subject: Re: [GIT PULL] dma-mapping updates for Linux 6.12 From: Xi Ruoyao To: Christoph Hellwig Cc: Linus Torvalds , linux-kernel@vger.kernel.org, iommu@lists.linux.dev Date: Sat, 21 Sep 2024 15:56:11 +0800 In-Reply-To: References: <971fbb889da38ca4e60f3dedde29ea43e9338d68.camel@xry111.site> <19e4bdbcda78ace200c78c56eb7173097337b921.camel@xry111.site> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.54.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Fri, 2024-09-20 at 22:12 -0700, Christoph Hellwig wrote: > On Sat, Sep 21, 2024 at 01:15:43AM +0800, Xi Ruoyao wrote: > > > > What camere and driver are you using? > >=20 > > Bus 003 Device 003: ID 0c45:6366 Microdia Webcam Vitade AF > >=20 > > The driver is uvcvideo. > >=20 > > > And what architecture and platform are you on?=20 > >=20 > > A x86_64 laptop (with Core i5-11300H CPU). >=20 > Oh, so it's not arm64, which has the most juicy changes this time > around. >=20 > Can you try the following "manual bisect" for me? >=20 > First test f69e342eec008e1bab772d3963c3dd9979293e13 to see if that > works.=C2=A0 If it doesn't work come back as I'm a bit lost :) Yes it works (kernel boots fine and camera works fine). > If it does work, try b5c58b2fdc427e7958412ecb2de2804a1f7c1572 next, > if it doesn't work can you send me your dmesg? It behaves completely erratically on boot. I cannot get a full log because the laptop has no serial output. And the behavior seems not deterministic. I have some transcript of messages I photoed in several boot attempts though: Oops: general protection fault, probably non-canonical address 0xf5c1150c09= 0c1cc1: 0000 [#1] PREEMPT SMP BUG: kernel NULL pointer dereference, address: 0000000000000078 BUG: Bad page map in process systemd-journal pte:150000000b pmd:1641dc067 --=20 Xi Ruoyao School of Aerospace Science and Technology, Xidian University