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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 091ACC433EF for ; Thu, 27 Jan 2022 10:55:24 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4JkyDC0GZ5z3cNl for ; Thu, 27 Jan 2022 21:55:23 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ellerman.id.au header.i=@ellerman.id.au header.a=rsa-sha256 header.s=201909 header.b=QKs/rB31; dkim-atps=neutral Received: from gandalf.ozlabs.org (gandalf.ozlabs.org [150.107.74.76]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4JkyCT4gRZz2yLX for ; Thu, 27 Jan 2022 21:54:45 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ellerman.id.au header.i=@ellerman.id.au header.a=rsa-sha256 header.s=201909 header.b=QKs/rB31; dkim-atps=neutral Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 4JkyCS74VSz4xNm; Thu, 27 Jan 2022 21:54:44 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ellerman.id.au; s=201909; t=1643280885; bh=5lIaVIE45bKk0MuhVgUEHyZpIklqveSec/luVC/AxhQ=; h=From:To:Subject:In-Reply-To:References:Date:From; b=QKs/rB31RreZtBU21tuy5vImut9RZ/88u/OsWhz1NO9DBxPqQsc2i3L/K81ygbrVW Py0fDRwCI6/VHui5vRW61oQqiB4I620Sn6cZZ8K508dMnq0khAhVw1EpAhgBBWZNYc q9jZM73cwECdChuqejJGrTvv2iscbusCvOrZQHvmh5dShpUJLyPQxQYE+jmMackuHf L66S9nnD+rhaq2OdZ1y5yaPWQVw0MgvxRsUlPQ3I+vPbmRuBjYzksTBf1EpAH9iBPn Y/9OgoPZSP0fz/uZBc3JpIZ6lsDFAaRoQvQVOKdIYFSqq+HsF03LPG0sQ68vl2JvVm N6k9kXG8LLFAw== From: Michael Ellerman To: Miguel Ojeda , linuxppc-dev , linux-kernel Subject: Re: ppc: hard lockup / hang in v5.17-rc1 under QEMU In-Reply-To: References: Date: Thu, 27 Jan 2022 21:54:39 +1100 Message-ID: <871r0tmosw.fsf@mpe.ellerman.id.au> MIME-Version: 1.0 Content-Type: text/plain X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Miguel Ojeda writes: > Hi PPC folks, > > Our ppc64le CI deterministically triggers a hard lockup / hang under > QEMU since v5.17-rc1 (upgrading from v5.16). > > Bisecting points to 0faf20a1ad16 ("powerpc/64s/interrupt: Don't enable > MSR[EE] in irq handlers unless perf is in use"). Hi Miguel, Thanks for the report. Nick has posted one fix for the commit you identified: http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20220124143930.3923442-1-npiggin@gmail.com/ It looks like your kernel-ppc64le-release.config does not have the hardlockup detector enabled, so I suspect you're hitting the bug described in that patch. That fix will hit linux-next in the next day or so and should be in rc2. cheers