From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 8818544CADF for ; Wed, 17 Jun 2026 16:14:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781712882; cv=none; b=afquGD2bTxdBWJwfrNNcpFU4S8N/tNRkpqbXM1VIAVRsjYat79VlpdvK0dSPDW7kQSmWwd3Gu408qwnjbkRd4JAzLbgcpXI5jEOgu8vjBxrxIY1GGLkXLwCPi4NOaI2bDNaPPPmYBWYiNXVE3mIckL1ZWlKKNtj2I/WJyxPfh+A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781712882; c=relaxed/simple; bh=CcP751lFJjX1ZP29fTmSaaIFSkAsoDmAg36EJIRXHA0=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: MIME-Version:Content-Type; b=f0hg3HgT1mtgWa723uZHq/9jRaffED2g1iRJyw3GWnRDCfel5mZXUlV0ecczKltElvT6LjRHkA1sz7EmIKHbenFJxzhOaYwhgB+RZ3I3I9PCx4MoG1huij1K13eTWE2DM5IEkwiWULjt6lH3OQ6xONzKxRt+keuHzMikHo062zs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=K5v4sPB4; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="K5v4sPB4" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1781712873; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=CcP751lFJjX1ZP29fTmSaaIFSkAsoDmAg36EJIRXHA0=; b=K5v4sPB4rTfqgNxSQMZR93aWj+woChdnE31IemJOpX+KGkzjEWQ6oADm7jeti+urqGfCl1 3iLSsgisZZPfgGFOcoJMOm/7iIr3H9n8dP1Wj9mh07eDPGoJ+SBAjw+eUlRGiXqDhJ76kp MrEVcgm29+tuhEVdS+IOMXLdIijRJW8= Received: from mail-wr1-f70.google.com (mail-wr1-f70.google.com [209.85.221.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-408-I7nr7KYvNGWR26CEeQ5f8g-1; Wed, 17 Jun 2026 12:14:32 -0400 X-MC-Unique: I7nr7KYvNGWR26CEeQ5f8g-1 X-Mimecast-MFC-AGG-ID: I7nr7KYvNGWR26CEeQ5f8g_1781712871 Received: by mail-wr1-f70.google.com with SMTP id ffacd0b85a97d-46315372c3eso9730f8f.0 for ; Wed, 17 Jun 2026 09:14:31 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781712871; x=1782317671; h=mime-version:user-agent:content-transfer-encoding:references :in-reply-to:date:cc:to:from:subject:message-id:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=CcP751lFJjX1ZP29fTmSaaIFSkAsoDmAg36EJIRXHA0=; b=q4xrkF1VvMJZz706OiZgU9PmCJwX2GKBEJ8e32eG7hr2+Vq0TAF2Yq+eXkp3z3LvLx 2mSLxrxSShEno7Vk53CDHYYCezWNJMwfC7+JkpVg5SI7WeXU27yflUoUunEao4CtyjkP 7KiPSYP+RRw/TRhUi3y6vXC6FvVra0PguXCKVA6bbL0NJ+/nvQgNmX1e/0haCn972Trh cLkK7u2OqHjK+tb4t8J3mj7xuxtOCdPnDekCbTvd6Gd3SnDNZvm+mE3lg+1YKrV9GaHK 1laFu3gzpl+Yjd2iPEHftKCqBbdw4QrQhu0TCrbAuTTr+JfxC7APeVHLuMKzs0lzd8pV v5yg== X-Gm-Message-State: AOJu0YwHXwuwUNrU0gWiJUNHQMjPOkBuKOJC66SBydmSAFrQ6y+fnk+Y LIZkDhQIWxIoiijWzgSMZH/boruWm+hY6S2hgrEG71mZLvykv2qIkbFD+vsBFe7fuwHwBFcOfk5 Ib1zvqIZCJiJ9q//bzJ9TYLZi1ae6jMQbwMFC9K8VMvv68b1uRDwZ8IuPsqB5Gs1wQog04sxJ/w == X-Gm-Gg: Acq92OEyMLE1hFYKuuGLo1peZC879ErgxJ4IaL5Dp4WX0R+idRd0aOHC+/BtLEvjI3g 2I0vqkcgh+nK5L5hTUVyGWf76Bclvv0DPMwiXb6B3Y/0npj/QBfHz3q1cK7dRYvXdjINkKy0hut akPi6NwBoXcFDtmSXLzdytZIh96DVRyuMF3ri8xlxhMsDxdciAmX+pxv/xZQRIO9LR64rGQV4VB L+aJ0B426PTMyyW0c2ThFVdg4ukVzSrEnQdNPjDiFKPPFNr4R+UtclNHD8pNQYBn2axk7CekuW1 lan1NUNwua4hLWMNrnIWk54uONBYRW6T8u311QFofSEv6b/ZU69+PZB90dOi7pO+jlfBmsDwWrC W2t9a80NKCNCX+eQ= X-Received: by 2002:a05:600c:1e0f:b0:490:e5c1:b88d with SMTP id 5b1f17b1804b1-492333babfbmr86664105e9.1.1781712870826; Wed, 17 Jun 2026 09:14:30 -0700 (PDT) X-Received: by 2002:a05:600c:1e0f:b0:490:e5c1:b88d with SMTP id 5b1f17b1804b1-492333babfbmr86663565e9.1.1781712870373; Wed, 17 Jun 2026 09:14:30 -0700 (PDT) Received: from [192.168.1.167] ([185.168.96.228]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4922fa510e7sm208072825e9.7.2026.06.17.09.14.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 17 Jun 2026 09:14:29 -0700 (PDT) Message-ID: <011cf25d84525949547299c9fc179e7dfa33018e.camel@redhat.com> Subject: Re: [PATCH 0/3] rv/reactors: fix lockdep warning and add KUnit tests From: Gabriele Monaco To: Nam Cao , wen.yang@linux.dev Cc: linux-trace-kernel@vger.kernel.org, linux-kernel@vger.kernel.org Date: Wed, 17 Jun 2026 18:14:27 +0200 In-Reply-To: <874ij16u6i.fsf@yellow.woof> References: <2bcfa0bda551c0e1ba137b728dbe7886ff5c2579.camel@redhat.com> <874ij16u6i.fsf@yellow.woof> User-Agent: Evolution 3.60.2 (3.60.2-1.fc44) Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: TIy7TLg2jZUFnEoJJ3kgnojb1jrtwvCHxf0fzIze0IY_1781712871 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, 2026-06-17 at 17:52 +0200, Nam Cao wrote: > Gabriele Monaco writes: > > Are those tests supposed to trigger this issue though? Under what > > configuration? > >=20 > > I reverted the lockdep fix and run the tests in vng on both x86_64 > > and arm64, both preempt_rt and not but I see no splat. > > Repeating the tests multiple times from debugfs also didn't seem to > > help. Both machines were relatively large (128 and 48 CPUs). > >=20 > > The config was the bare vng one with kunit built-in, lockdep and > > the reactors tests. > >=20 > > What am I missing? >=20 > I haven't tried to reproduce it, but seems quite rare. From the look > of it, adding some delay into the reactor function should make the > issue more easily reproducible. Yeah the tests should be doing that, but even increasing the delay didn't help. I should probably try on physical machines to have more likely interrupts but at least the tick should be running.