From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from todd.t-8ch.de (todd.t-8ch.de [159.69.126.157]) (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 BCEC73C2F; Wed, 1 Oct 2025 22:44:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.69.126.157 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759358692; cv=none; b=a05jbbknxROzEBDLMS/+hasUldj2Pnc9/5ynYXR7z6mQCbMjZW930STYmeI1+tiUWWxHgEJNJR4J479l3bISKBlrHOLBGteJ12EWogkbgXuSzq4wrKYcaGq7XKQAcfFLSNGertlGRdIcJ/liD772cJOTl9dhtN4hiO8iY7Gd+UM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759358692; c=relaxed/simple; bh=s5kjNf2wXFmoDUpOn0w2FymRtMeZUwY78l6Vhxz6nvA=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=CC+r4ex+zcxZipmorpj4rPRlJj5sOsDY6LUjRmhb00wuyuU2xVF1VmyAlNkHwIvG7fI+4vFGOHp4h7AFCrVV56YaIN6eD6ukn69NTZhoP+a+6hfze/lOwZwNgaNiIQgNg+4aMI83/CthPVGm9vtKnaBHTIsDtlwcosMLMWIeL4A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=weissschuh.net; spf=pass smtp.mailfrom=weissschuh.net; dkim=pass (1024-bit key) header.d=weissschuh.net header.i=@weissschuh.net header.b=hpg8aH5z; arc=none smtp.client-ip=159.69.126.157 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=weissschuh.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=weissschuh.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=weissschuh.net header.i=@weissschuh.net header.b="hpg8aH5z" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=weissschuh.net; s=mail; t=1759358681; bh=s5kjNf2wXFmoDUpOn0w2FymRtMeZUwY78l6Vhxz6nvA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=hpg8aH5zr968WgFC8Z9LLYSBJmW7FW7bz22DBY4xVS8gV5YTsM71M8r0TeSq8DnFa TcrvkLL9O4YyKdgpo0xqBvTVhsU4Z8MojgHJsBoxZ6nl7j7a+k1oxwgyWwYdDineX8 bqLeT/62/tH5h4SIaB7S6nhSJXgDug9brf0IkCZ8= Date: Thu, 2 Oct 2025 00:44:41 +0200 From: Thomas =?utf-8?Q?Wei=C3=9Fschuh?= To: Alexander Gordeev , Heiko Carstens , Vasily Gorbik Cc: Linus Torvalds , linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [GIT PULL] s390 fixes for 6.17-rc3 Message-ID: References: <20250822123608.142112A72-agordeev@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250822123608.142112A72-agordeev@linux.ibm.com> Hi Alexander, Vasily and Heiko, On 2025-08-22 14:36:08+0200, Alexander Gordeev wrote: > please pull s390 fixes for 6.17-rc3. (...) > s390/configs: Set HZ=1000 With this commit the nolibc testsuite for 32bit on QEMU 10.1.0 starts to reliably crash. 64bit is fine. Actually I encountered the same problem before this change, but it happened much less frequently. Output below for a testrun that never got to print anything to stdout, but the crashes can also happen later or sometimes not at all. [ 2.118473] Run /init as init process [ 2.142148] User process fault: interruption code 0006 ilc:0 [ 2.142626] CPU: 0 UID: 0 PID: 1 Comm: init Not tainted 6.17.0-rc2-00002-gfcc43a7e294f #24 NONE [ 2.142739] Hardware name: QEMU 8561 QEMU (KVM/Linux) [ 2.142822] User PSW : 0705200080000000 00000000804087b2 [ 2.142911] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:1 AS:0 CC:2 PM:0 RI:0 EA:1 [ 2.142979] User GPRS: 0000000000000000 000000000040c060 ffffffffffffffff 0000000000000002 [ 2.143022] 0000000000000800 00000000000007ff 0000000000000000 0000000000000000 [ 2.143061] 0000000000000000 000003ff00000001 000000000040c000 000000007ff720ac [ 2.143106] 000000007ff720a4 0000000000409540 00000000804087b2 000000007ff71ec0 [ 2.143406] User Code: Bad PSW. [ 2.143454] Last Breaking-Event-Address: [ 2.143483] [<0000000000000001>] [ 2.144705] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000004 [ 2.144875] CPU: 0 UID: 0 PID: 1 Comm: init Not tainted 6.17.0-rc2-00002-gfcc43a7e294f #24 NONE [ 2.144922] Hardware name: QEMU 8561 QEMU (KVM/Linux) [ 2.144989] Call Trace: [ 2.145292] [<000003fffe657cf4>] vpanic+0x1dc/0x2f0 [ 2.145535] [<000003fffe657e4e>] panic+0x46/0x48 [ 2.145586] [<000003fffe65e4e2>] do_exit+0x3da/0x520 [ 2.145634] [<000003fffe65e820>] do_group_exit+0x40/0xb8 [ 2.145683] [<000003fffe66fc98>] copy_siginfo_to_user+0x0/0x60 [ 2.145735] [<000003fffe60614e>] arch_do_signal_or_restart+0x66/0x2b0 [ 2.145787] [<000003ffff42e2bc>] irqentry_exit_to_user_mode+0x174/0x1f8 [ 2.145902] [<000003ffff439d5c>] pgm_check_handler+0x114/0x160 You can run the testuite for yourself: (run-tests.sh will download a cross toolchain) $ cd tools/testing/selftests/nolibc $ ./run-tests.sh -p s390 (Expected output, lower numbers mean failures) s390: 228 test(s): 227 passed, 1 skipped, 0 failed => status: warning The full test output will be in run.out. This doesn't feel like an issue in nolibc to me. Any ideas? Thomas