From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from wp530.webpack.hosteurope.de (wp530.webpack.hosteurope.de [80.237.130.52]) (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 6B6F07FC for ; Wed, 5 Apr 2023 12:50:39 +0000 (UTC) Received: from [2a02:8108:8980:2478:8cde:aa2c:f324:937e]; authenticated by wp530.webpack.hosteurope.de running ExIM with esmtpsa (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) id 1pk2ay-0006VW-GK; Wed, 05 Apr 2023 14:50:36 +0200 Message-ID: Date: Wed, 5 Apr 2023 14:50:36 +0200 Precedence: bulk X-Mailing-List: regressions@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.9.1 Subject: Re: kernel 6.2 stuck at boot (efi_call_rts) on arm64 Content-Language: en-US, de-DE From: "Linux regression tracking #update (Thorsten Leemhuis)" To: Andrea Righi , "Jason A. Donenfeld" Cc: Ard Biesheuvel , Paolo Pisati , linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, Linux kernel regressions list Reply-To: Linux regressions mailing list , Linux regressions mailing list References: <59064730-e731-d137-ae92-e19622a122d0@leemhuis.info> In-Reply-To: <59064730-e731-d137-ae92-e19622a122d0@leemhuis.info> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-bounce-key: webpack.hosteurope.de;regressions@leemhuis.info;1680699039;a301334b; X-HE-SMSGID: 1pk2ay-0006VW-GK [TLDR: This mail in primarily relevant for Linux kernel regression tracking. See link in footer if these mails annoy you.] On 16.03.23 10:45, Linux regression tracking #adding (Thorsten Leemhuis) wrote: > On 16.03.23 08:54, Andrea Righi wrote: >> Hello, >> >> the latest v6.2.6 kernel fails to boot on some arm64 systems, the kernel >> gets stuck and never completes the boot. On the console I see this: >> >> [ 72.043484] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: >> [ 72.049571] rcu: 22-...0: (30 GPs behind) idle=b10c/1/0x4000000000000000 softirq=164/164 fqs=6443 >> [ 72.058520] (detected by 28, t=15005 jiffies, g=449, q=174 ncpus=32) >> [ 72.064949] Task dump for CPU 22: >> [ 72.068251] task:kworker/u64:5 state:R running task stack:0 pid:447 ppid:2 flags:0x0000000a >> [ 72.078156] Workqueue: efi_rts_wq efi_call_rts >> [ 72.082595] Call trace: >> [ 72.085029] __switch_to+0xbc/0x100 >> [ 72.088508] 0xffff80000fe83d4c >> >> After that, as a consequence, I start to get a lot of hung task timeout traces. >> >> I tried to bisect the problem and I found that the offending commit is >> this one: >> >> e7b813b32a42 ("efi: random: refresh non-volatile random seed when RNG is initialized") >> >> I've reverted this commit for now and everything works just fine, but I >> was wondering if the problem could be caused by a lack of entropy on >> these arm64 boxes or something else. > > Thanks for the report. To be sure the issue doesn't fall through the > cracks unnoticed, I'm adding it to regzbot, the Linux kernel regression > tracking bot: > > #regzbot ^introduced e7b813b32a42 > #regzbot title efi: stuck at boot (efi_call_rts) on arm64 > #regzbot ignore-activity #regzbot fix: eb684408f3ea4856 #regzbot ignore-activity Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat) -- Everything you wanna know about Linux kernel regression tracking: https://linux-regtracking.leemhuis.info/about/#tldr That page also explains what to do if mails like this annoy you.