From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 5971B3E47B for ; Tue, 3 Jun 2025 14:28:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748960904; cv=none; b=eXM0hpIN1Ofle2PGc8B18Ooyca5nde4KQKQK8Cv+RW4r2dRDvSnhRHQ4L+F1JQe6EcsVYg407fFbdq0lUqTC/k/msmmGSd5Qa+yjJq+SGnnVBU0lGOi78kV8zewcgC9Y+7/H+4A5n/EEqRTVlyT2jLUtRjOX+3RV/AvASRAgaG0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748960904; c=relaxed/simple; bh=aIU2Fjh+8fTusD3pQHtrSwEhdjzHPQT+huzCgoAfCxs=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=BuSHwKn4N5UPH3Repi3GrhQOEIKKnBwjRjCMVN07ZCOrE7y5X1G8d/o5L0yidJdM+IoO9tvVfs96mpjPchWGNzGUckvlpI/8Nkg2LWY3SUv059bNt1gfP33yuiosF+VahsiNSLBfle4UijuH+k8LYOFffvEaQvhtqzy2QVyo6+U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jP4TkH4s; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="jP4TkH4s" Received: by smtp.kernel.org (Postfix) with ESMTPS id BB323C4CEF5 for ; Tue, 3 Jun 2025 14:28:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1748960903; bh=aIU2Fjh+8fTusD3pQHtrSwEhdjzHPQT+huzCgoAfCxs=; h=From:To:Subject:Date:In-Reply-To:References:From; b=jP4TkH4shaXLpGtGxDw/zd10JZY/iasLIIVd3Q1X5eKlscaTtcGj6r1ro1mocDXGv GkTluIcBs0holXLZnanW2UsO49AtIgMRp48+/NbzX0ceRb0aHZXsTu+3wLCQnfx9iD tFTwa9c5eqqzJ9y5M5KnRdJFiGysPjJT+N+wq3ZQDZoFlAt2bSF0OO+RgAHWk/AzJe IuX1HWfhISIheMqlfqUAYwwp9vbNv2wvmx0pAvm/uQhaSfMzxAYDpE9odoYQtbR44C /tBGJD9XbKIupjd9XfpKpASzeXQsZ+i8kAuRWERzegote0lLMpHRT8NJcjiQ9DnycX KVIslpjYXFddQ== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id B219CCAB780; Tue, 3 Jun 2025 14:28:23 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 215740] kernel warning: DMA-API: xhci_hcd: cacheline tracking EEXIST, overlapping mappings aren't supported Date: Tue, 03 Jun 2025 14:28:23 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Product: Drivers X-Bugzilla-Component: USB X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: stern@rowland.harvard.edu X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D215740 --- Comment #42 from Alan Stern (stern@rowland.harvard.edu) --- In theory the problem could arise from any two kmalloc allocations, not just the ones done by the USB hub driver. It would be better to fix this in the= MM core or in Kconfig: Set the minimal allocation alignment to the cache-line = size whenever CONFIG_DMA_API_DEBUG is enabled. Would that be acceptable? --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=