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bh=oVdy8Z7vxFzMcZIpJyuv2XRd6gG/b+uZsIufJIRyPeI=; b=QWJHUWIgKOkWwT5562fAfhJ9uJLrMtrpaQzMifCtJqLDgfMH1u0XdXvTrh/CIOCabQaqBQ cgVIVQfi+KbJuFCT91ih48QWuiIbiuqxQQmVYbL3MRkooSCRWlld82qxYukk0KBouUC5+s sPwO3i1DSbY3/HMlf8cjedZHjTcl/yRhtB5QQuBMhj230CXdpEdwdGa8YSrmsyzG/UgyQA 1demA3314+qD7tnrtLuzDi6J/CxsthtD+prE43pUGT3U9AhOUyD3mk5ufQ0H9YTqW4LlPs mdwNnmjuYXMtUK623HiF/mOvnsFKhx2u2NXrL3mRP/ARU+mAj9214FAQMtPV0g== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1754468376; 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=oVdy8Z7vxFzMcZIpJyuv2XRd6gG/b+uZsIufJIRyPeI=; b=pgHLrFBriDWLVZhnxPV/QBPg3icmRlb1PYdcBqzrGiZnZXZRxauEBmaFZGqJidZmTuwGyC YjtRtX5quqfdPWBA== To: Oliver Sang Cc: Peter Zijlstra , oe-lkp@lists.linux.dev, lkp@intel.com, linux-kernel@vger.kernel.org, x86@kernel.org, Sebastian Andrzej Siewior , linux-mm@kvack.org, ltp@lists.linux.it, oliver.sang@intel.com Subject: Re: [tip:locking/futex] [futex] 56180dd20c: BUG:sleeping_function_called_from_invalid_context_at_kernel/nsproxy.c In-Reply-To: References: <202507231021.dcf24373-lkp@intel.com> <87a54usty4.ffs@tglx> <87seikp94v.ffs@tglx> <87wm7ro3r7.ffs@tglx> <87cy9gilo8.ffs@tglx> <874iusihka.ffs@tglx> Date: Wed, 06 Aug 2025 10:19:36 +0200 Message-ID: <87qzxoeuav.ffs@tglx> MIME-Version: 1.0 Content-Type: text/plain X-Rspamd-Queue-Id: 7706A1C000C X-Rspam-User: X-Rspamd-Server: rspam09 X-Stat-Signature: p78izepxmbc1ncri4g38bnh96gje6ncn X-HE-Tag: 1754468379-459383 X-HE-Meta: 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 dGvqYubg Yk6jQb4qCE/a/plQ3XHHyCwcp1rPRAsRyZMKogSP0QiwfpnZhrNtFZV8MKTGko/3PA0cqXKmI5ipN9JSwoc3mjOjxeREplWTvFELE+JDvKf7zLCdDQRuFHK0iuxGIzG6FbZn3xZJsZGEIvSEaz+QsUEv83ablJspSf0N9mHOEiFNgpXMYFk0dMugact/zEPSgzZTp X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Oliver! On Wed, Aug 06 2025 at 16:01, Oliver Sang wrote: > On Thu, Jul 31, 2025 at 04:03:01PM +0200, Thomas Gleixner wrote: >> On Thu, Jul 31 2025 at 14:34, Thomas Gleixner wrote: >> > Either you make the timeout longer or try the following on the kernel >> > command line instead of 'ftrace_dump_on_cpu': >> >> instead of 'ftrace_dump_ooops' > > sorry for late, I just took several-day off. I hope you had a good time! > attached dmesg FYI. Thanks for doing this. Now the buffer is too short and as nothing stops the tracer the interesting stuff goes out of sight. Can you please apply the patch below and try again? Thanks, tglx --- --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -5850,6 +5850,8 @@ void preempt_count_sub(int val) /* * Underflow? */ + if (val > preempt_count()) + tracing_off(); if (DEBUG_LOCKS_WARN_ON(val > preempt_count())) return; /* 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 picard.linux.it (picard.linux.it [213.254.12.146]) (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 D4AC4C87FCB for ; Wed, 6 Aug 2025 08:19:55 +0000 (UTC) Received: from picard.linux.it (localhost [IPv6:::1]) by picard.linux.it (Postfix) with ESMTP id 0FF5F3C1AA7 for ; Wed, 6 Aug 2025 10:19:54 +0200 (CEST) Received: from in-7.smtp.seeweb.it (in-7.smtp.seeweb.it [217.194.8.7]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1) server-digest SHA384) (No client certificate requested) by picard.linux.it (Postfix) with ESMTPS id 574C63C133E for ; Wed, 6 Aug 2025 10:19:39 +0200 (CEST) Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (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 in-7.smtp.seeweb.it (Postfix) with ESMTPS id 5051E200AC1 for ; Wed, 6 Aug 2025 10:19:37 +0200 (CEST) From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1754468376; 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=oVdy8Z7vxFzMcZIpJyuv2XRd6gG/b+uZsIufJIRyPeI=; b=QWJHUWIgKOkWwT5562fAfhJ9uJLrMtrpaQzMifCtJqLDgfMH1u0XdXvTrh/CIOCabQaqBQ cgVIVQfi+KbJuFCT91ih48QWuiIbiuqxQQmVYbL3MRkooSCRWlld82qxYukk0KBouUC5+s sPwO3i1DSbY3/HMlf8cjedZHjTcl/yRhtB5QQuBMhj230CXdpEdwdGa8YSrmsyzG/UgyQA 1demA3314+qD7tnrtLuzDi6J/CxsthtD+prE43pUGT3U9AhOUyD3mk5ufQ0H9YTqW4LlPs mdwNnmjuYXMtUK623HiF/mOvnsFKhx2u2NXrL3mRP/ARU+mAj9214FAQMtPV0g== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1754468376; 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=oVdy8Z7vxFzMcZIpJyuv2XRd6gG/b+uZsIufJIRyPeI=; b=pgHLrFBriDWLVZhnxPV/QBPg3icmRlb1PYdcBqzrGiZnZXZRxauEBmaFZGqJidZmTuwGyC YjtRtX5quqfdPWBA== To: Oliver Sang In-Reply-To: References: <202507231021.dcf24373-lkp@intel.com> <87a54usty4.ffs@tglx> <87seikp94v.ffs@tglx> <87wm7ro3r7.ffs@tglx> <87cy9gilo8.ffs@tglx> <874iusihka.ffs@tglx> Date: Wed, 06 Aug 2025 10:19:36 +0200 Message-ID: <87qzxoeuav.ffs@tglx> MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 1.0.7 at in-7.smtp.seeweb.it X-Virus-Status: Clean Subject: Re: [LTP] [tip:locking/futex] [futex] 56180dd20c: BUG:sleeping_function_called_from_invalid_context_at_kernel/nsproxy.c X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: lkp@intel.com, Peter Zijlstra , Sebastian Andrzej Siewior , x86@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, oliver.sang@intel.com, oe-lkp@lists.linux.dev, ltp@lists.linux.it Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" Oliver! On Wed, Aug 06 2025 at 16:01, Oliver Sang wrote: > On Thu, Jul 31, 2025 at 04:03:01PM +0200, Thomas Gleixner wrote: >> On Thu, Jul 31 2025 at 14:34, Thomas Gleixner wrote: >> > Either you make the timeout longer or try the following on the kernel >> > command line instead of 'ftrace_dump_on_cpu': >> >> instead of 'ftrace_dump_ooops' > > sorry for late, I just took several-day off. I hope you had a good time! > attached dmesg FYI. Thanks for doing this. Now the buffer is too short and as nothing stops the tracer the interesting stuff goes out of sight. Can you please apply the patch below and try again? Thanks, tglx --- --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -5850,6 +5850,8 @@ void preempt_count_sub(int val) /* * Underflow? */ + if (val > preempt_count()) + tracing_off(); if (DEBUG_LOCKS_WARN_ON(val > preempt_count())) return; /* -- Mailing list info: https://lists.linux.it/listinfo/ltp