linux-kernel - Re: [PATCH] kdump: Remove redundant DEFAULT_CRASH_KERNEL_LOW

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Date: Wed, 27 Dec 2023 08:48:24 +0800
From: Baoquan He <bhe@...hat.com>
To: kernel test robot <lkp@...el.com>
Cc: Youling Tang <youling.tang@...look.com>, oe-kbuild-all@...ts.linux.dev,
	Huacai Chen <chenhuacai@...ngson.cn>, linux-kernel@...r.kernel.org,
	Youling Tang <tangyouling@...inos.cn>
Subject: Re: [PATCH] kdump: Remove redundant DEFAULT_CRASH_KERNEL_LOW_SIZE

On 12/27/23 at 01:13am, kernel test robot wrote:
> Hi Youling,
> 
> kernel test robot noticed the following build errors:
> 
> [auto build test ERROR on linus/master]
> [also build test ERROR on v6.7-rc7 next-20231222]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Youling-Tang/kdump-Remove-redundant-DEFAULT_CRASH_KERNEL_LOW_SIZE/20231226-193215
> base:   linus/master
> patch link:    https://lore.kernel.org/r/MW4PR84MB3145D3EB871BBD59AA71C0FC8198A%40MW4PR84MB3145.NAMPRD84.PROD.OUTLOOK.COM
> patch subject: [PATCH] kdump: Remove redundant DEFAULT_CRASH_KERNEL_LOW_SIZE
> config: i386-buildonly-randconfig-002-20231226 (https://download.01.org/0day-ci/archive/20231227/202312270133.8w4Wrh4h-lkp@intel.com/config)
> compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231227/202312270133.8w4Wrh4h-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202312270133.8w4Wrh4h-lkp@intel.com/
> 
> All errors (new ones prefixed by >>):

This has been fixed by patch author's v2 patch:
https://lore.kernel.org/all/MW4PR84MB3145459ADC7EB38BBB36955B8198A@MW4PR84MB3145.NAMPRD84.PROD.OUTLOOK.COM/T/#u

> 
>    arch/x86/kernel/setup.c: In function 'arch_reserve_crashkernel':
> >> arch/x86/kernel/setup.c:479:8: error: implicit declaration of function 'parse_crashkernel' [-Werror=implicit-function-declaration]
>      479 |  ret = parse_crashkernel(cmdline, memblock_phys_mem_size(),
>          |        ^~~~~~~~~~~~~~~~~
>    cc1: some warnings being treated as errors
> 
> 
> vim +/parse_crashkernel +479 arch/x86/kernel/setup.c
> 
> a0a0becd2da0ba Yinghai Lu     2008-07-03  468  
> 9c08a2a139fe83 Baoquan He     2023-09-14  469  static void __init arch_reserve_crashkernel(void)
> ccb4defa71744f Yinghai Lu     2008-06-25  470  {
> 9c08a2a139fe83 Baoquan He     2023-09-14  471  	unsigned long long crash_base, crash_size, low_size = 0;
> 9c08a2a139fe83 Baoquan He     2023-09-14  472  	char *cmdline = boot_command_line;
> 55a20ee7804ab6 Yinghai Lu     2013-04-15  473  	bool high = false;
> ccb4defa71744f Yinghai Lu     2008-06-25  474  	int ret;
> ccb4defa71744f Yinghai Lu     2008-06-25  475  
> 4ece09be9913a8 Jisheng Zhang  2022-03-23  476  	if (!IS_ENABLED(CONFIG_KEXEC_CORE))
> 4ece09be9913a8 Jisheng Zhang  2022-03-23  477  		return;
> 4ece09be9913a8 Jisheng Zhang  2022-03-23  478  
> 9c08a2a139fe83 Baoquan He     2023-09-14 @479  	ret = parse_crashkernel(cmdline, memblock_phys_mem_size(),
> 9c08a2a139fe83 Baoquan He     2023-09-14  480  				&crash_size, &crash_base,
> 9c08a2a139fe83 Baoquan He     2023-09-14  481  				&low_size, &high);
> 9c08a2a139fe83 Baoquan He     2023-09-14  482  	if (ret)
> 32105f7fd8faa7 Bernhard Walle 2008-06-26  483  		return;
> 32105f7fd8faa7 Bernhard Walle 2008-06-26  484  
> 3db3eb285259ac Petr Tesarik   2018-04-25  485  	if (xen_pv_domain()) {
> 3db3eb285259ac Petr Tesarik   2018-04-25  486  		pr_info("Ignoring crashkernel for a Xen PV domain\n");
> 3db3eb285259ac Petr Tesarik   2018-04-25  487  		return;
> 3db3eb285259ac Petr Tesarik   2018-04-25  488  	}
> 3db3eb285259ac Petr Tesarik   2018-04-25  489  
> 9c08a2a139fe83 Baoquan He     2023-09-14  490  	reserve_crashkernel_generic(cmdline, crash_size, crash_base,
> 9c08a2a139fe83 Baoquan He     2023-09-14  491  				    low_size, high);
> ccb4defa71744f Yinghai Lu     2008-06-25  492  }
> ccb4defa71744f Yinghai Lu     2008-06-25  493  
> 
> -- 
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
>