Received-SPF: pass (google.com: domain of linux-kernel+bounces-47981-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.199.223 as permitted sender) client-ip=147.75.199.223;
Message-ID: <07f1cb33-e908-48cb-85f9-83a040b2ca5a@leemhuis.info>
Date: Thu, 1 Feb 2024 11:38:38 +0100
Precedence: bulk
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
Subject: Re: [REGRESSION] Platforms supporting SGX fail to kexec due to
 96c6b8f212a ("memblock: report failures when memblock_can_resize is not set")
Content-Language: en-US, de-DE
To: Mike Rapoport <rppt@kernel.org>, Ashok Raj <ashok.raj@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
 LKML Mailing List <linux-kernel@vger.kernel.org>,
 Thomas Gleixner <tglx@linutronix.de>, Borislav Petkov <bp@alien8.de>,
 Dave Hansen <dave.hansen@intel.com>, Ingo Molnar <mingo@kernel.org>,
 regressions@lists.linux.dev, Song Shuai <songshuaishuai@tinylab.org>
References: <ZY4T7YxrJZCxhMxx@a4bf019067fa.jf.intel.com>
 <ZZEXnl3w0K6avYR3@kernel.org>
From: "Linux regression tracking (Thorsten Leemhuis)"
 <regressions@leemhuis.info>
Reply-To: Linux regressions mailing list <regressions@lists.linux.dev>
In-Reply-To: <ZZEXnl3w0K6avYR3@kernel.org>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit

On 31.12.23 08:26, Mike Rapoport wrote:
> On Thu, Dec 28, 2023 at 04:33:49PM -0800, Ashok Raj wrote:
>> 96c6b8f212a ("memblock: report failures when memblock_can_resize is not set")
>>
>> Causes kexec failure. Backing out this change, kexec succeeds. Symptom is
>> it appears to hang, possibly hung at the panic. Although I have the
>> earlyprintk enabled, I don't see any console messages when new kernel
>> boots. 
>>
>> Also tested turning off CONFIG_X86_SGX, the kernel with this commit
>> included also kexec's fine.
>>
>> Booting from warm/cold reset has no issues. Only kexec to new kernel with
>> this change included and CONFIG_X86_SGX=y causes the kexec failure.
> 
> Can you add memblock=debug to the kernel command line and send logs for
> normal boot and kexec with CONFIG_X86_SGX=y and e96c6b8f212a reverted?

Ashok, you afaics never replied. Did you forget about it? Or was the
issue resolved later or never a regression in the first place? I for now
assume it's one of the latter and stop tracking this:

#regzbot inconclusive: radio silence from reporter
#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