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[90.235.20.237]) by smtp.gmail.com with ESMTPSA id a30-20020a05651c211e00b002b9ead74535sm2065747ljq.15.2023.09.04.04.23.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Sep 2023 04:23:22 -0700 (PDT) From: Uladzislau Rezki X-Google-Original-From: Uladzislau Rezki Date: Mon, 4 Sep 2023 13:23:20 +0200 To: Marcus Seyfarth Cc: paulmck@kernel.org, Bagas Sanjaya , Ziwei Dai , Uladzislau Rezki , linux-kernel@vger.kernel.org, rcu@vger.kernel.org Subject: Re: Fwd: [6.5.1] Slow boot and opening files (RIP: kvfree_rcu_bulk) Message-ID: References: <0e6fc43f-3078-911a-e63d-290c3e6d7b91@gmail.com> <4009a6e0-198c-4f25-8e34-4774dcd8c537@paulmck-laptop> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, Marcus. > > Apologies. > > I want you to follow the advice I gave you in my earlier email, the one > with Message-ID c054b588-b029-4380-9ec5-4ae50ee37d08@paulmck-laptop. > I would give you a URL, but you seem to have dropped the public email > lists.  I have added them back. > > > Sorry, I've overlooked that previous mail. I've now tried CONFIG_RCU_LAZY=n and > also reduced the amount of extra-patches and extra-flags to a bare minimum. It > didn't help though. The slow boot is still there and shutdown/reboot also > didn't seem to work again (while the trace went away by overwriting /kernel/rcu > /tree.c with the file from 6.4.14). I am also not subscribed to the LKML, so my > E-Mails won't reach the list anyway. Unfortunately Zhang Qiang doesn't seem to > work for Intel any longer as my previous mail did not reach him either. I hope > the reported issues will be fixed eventually, I'll stay away from 6.5 for some > time. > Could you please clarify some items: 1. if (!WARN_ON_ONCE(!poll_state_synchronize_rcu_full(&bnode->gp_snap))) { debug_rcu_bhead_unqueue(bnode); rcu_lock_acquire(&rcu_callback_map); Do you see this warning? I mean the one that is in the if()? 2. Please provide a full .config file. 3. Could you please also to be more specific how to reproduce a boot delay and the warning you see? 4. Please provide your full dmesg. Thank you in advance! -- Uladzislau Rezki