From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 247B7C87FDB for ; Mon, 11 Aug 2025 13:04:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: Message-ID:Date:References:In-Reply-To:Subject:Cc:To:From:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=YDsjR207hfpsaWUHS9KSTpKCqXr2Odiy8s+8w4yXsg8=; b=rgKgSKjRD4XoXflUdsvvggfsEw KqygO6t2KPMGj4zw6ks110tYTN3bYI666Y0TQh9KaT9yqSiCYrs9cWmZinSEANpc7WviHFT9c5PHu 3BgS4iE7DRkBk47ZLAPv8I9GB6WgQRanF6iAJpq1pQZeYpELtxS3beHIoGjjB4nymvJwh8s3QQqql UTmCsntI4wWsjFPHEtbEd46nWkho+Nd6Pe39VL2vyHDrF2H1+4LTzMP84twDk3R0117J+WPYBjYVH EbkE9bb755Jh1ziCpCfMX2JaDoQv6vNr+m4Bl4P8QxDLeY8gVaBwEtG0mmUFgVbYDKx8y+ZGgwzmA Ig5/YdDA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1ulSCc-00000007l6Y-0g0P; Mon, 11 Aug 2025 13:04:38 +0000 Received: from galois.linutronix.de ([193.142.43.55]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1ulSAf-00000007kli-1GtU; Mon, 11 Aug 2025 13:02:38 +0000 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> MIME-Version: 1.0 Content-Type: text/plain X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250811_060237_480640_1BF0EEE8 X-CRM114-Status: UNSURE ( 9.11 ) X-CRM114-Notice: Please train this message. X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org 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