From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (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 7D85F139D for ; Mon, 11 Aug 2025 13:02:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754917358; cv=none; b=F4DZDCfS+z8kdidwUNO0V8WOY7ousn0LUy6Wv9/dQEj1zgKGwNV2sUOV6ontQuqQFKEbidwQv0MGimdBKg8mnsdjLu7BfKEDdG67goiuH/CYPhyqF06GC0rJwL1RnA/hRjJRu9FBG7Y3s+Mr8B3MOj+2EYsQ68gEfDnULiO9mow= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754917358; c=relaxed/simple; bh=J1ONyC0Swp2SCABYDiISNQ1Ba/ANGqCCk54sdg3rV4k=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=H0FLrEDPpjpUXjelvUMqs20K8oMp1OjE3CQPal3OcfjEUlSzOxvNNWsWm1GsuuFwbcqphidWN6AGaElqS3z/RT07uQlIJWtUn1i7OYwHsWQaqY2FyO/agP8sdWLXOZwgvEcj/XSBm4d8SO6hx/LkU/qsvGGHQEMHhv+89Pdzq4w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=h3erkPJ4; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=y4Y+tgr8; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="h3erkPJ4"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="y4Y+tgr8" From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1754917355; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=YDsjR207hfpsaWUHS9KSTpKCqXr2Odiy8s+8w4yXsg8=; b=h3erkPJ4NkDW+BeSWj3jOZn/ZGUa4FEE9JuMubh7GmQO/xSdORO43i1f2TGCAx7LclvCel 9dlSMuUFY1QEn6HT3DcCzjXgedPje7ukbnrfz61ShpqJVfIv45A6MRiZdGhCro8cLvyp6D Nns5bSv3fC6yDw2+7GfgiiDOnD4QOkCWkSCWfXmFs9kOynD/sBGXLh64QuaDLRatM/IFCs xtH/6BUwyJD/fGxHkR50P0Qm0rMTLo9DrbReKCHoMP+DJPKdd3e4OuA1G3zYSVGyhxCeO2 o9KXEo2+RT/leeWR8ggjPvrIawD5MGG+Y9ALD+MuiZEIFFqWOQwgp9jisrAToQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1754917355; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=YDsjR207hfpsaWUHS9KSTpKCqXr2Odiy8s+8w4yXsg8=; b=y4Y+tgr88v/UurMktQIBqQoWuoT9Dxmn7FMhhA7sXmj2EIPKrfjmO3mlZzeAu9UuKEfCF7 lPXqfFmyhCf4qkCw== To: Coiby Xu Cc: linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org, kexec@lists.infradead.org Subject: Re: [Regression] kdump fails to get DHCP address unless booting with pci=nomsi or without nr_cpus=1 In-Reply-To: References: Date: Mon, 11 Aug 2025 15:02:33 +0200 Message-ID: <87bjom8106.ffs@tglx> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Mon, Aug 11 2025 at 11:23, Coiby Xu wrote: > Recently I met an issue that on certain virtual machines, the kdump > kernel fails to get DHCP IP address most of times starting from > 6.11-rc2. git bisection shows commit b5712bf89b4b ("irqchip/gic-v3-its: > Provide MSI parent for PCI/MSI[-X]") is the 1st bad commit, > > # good: [7d189c77106ed6df09829f7a419e35ada67b2bd0] PCI/MSI: Provide > # MSI_FLAG_PCI_MSI_MASK_PARENT > git bisect good 7d189c77106ed6df09829f7a419e35ada67b2bd0 > # good: [48f71d56e2b87839052d2a2ec32fc97a79c3e264] irqchip/gic-v3-its: > # Provide MSI parent infrastructure > git bisect good 48f71d56e2b87839052d2a2ec32fc97a79c3e264 > # good: [8c41ccec839c622b2d1be769a95405e4e9a4cb20] irqchip/irq-msi-lib: > # Prepare for PCI MSI/MSIX > git bisect good 8c41ccec839c622b2d1be769a95405e4e9a4cb20 > # first bad commit: [b5712bf89b4bbc5bcc9ebde8753ad222f1f68296] > # irqchip/gic-v3-its: Provide MSI parent for PCI/MSI[-X] There were follow up fixes on this, so isolating this one is not really conclusive. Is the problem still there on v6.16 and v6.17-rc1? Thanks, tglx