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From: Baoquan He <bhe@redhat.com>
To: Borislav Petkov <bp@alien8.de>
Cc: Eric DeVolder <eric.devolder@oracle.com>,
	linux-kernel@vger.kernel.org, x86@kernel.org,
	kexec@lists.infradead.org, ebiederm@xmission.com,
	dyoung@redhat.com, vgoyal@redhat.com, tglx@linutronix.de,
	mingo@redhat.com, dave.hansen@linux.intel.com, hpa@zytor.com,
	nramas@linux.microsoft.com, thomas.lendacky@amd.com,
	robh@kernel.org, efault@gmx.de, rppt@kernel.org,
	david@redhat.com, sourabhjain@linux.ibm.com,
	konrad.wilk@oracle.com, boris.ostrovsky@oracle.com
Subject: Re: [PATCH v14 3/7] crash: add generic infrastructure for crash hotplug support
Date: Wed, 7 Dec 2022 21:57:48 +0800	[thread overview]
Message-ID: <Y5Cb3KGDXijyBXfM@MiWiFi-R3L-srv> (raw)
In-Reply-To: <Y5CKNqtDm5VT+gsz@zn.tnic>

On 12/07/22 at 01:42pm, Borislav Petkov wrote:
> On Wed, Dec 07, 2022 at 08:36:13PM +0800, Baoquan He wrote:
> > Below is my last reply to Eric about my thinking on this.
> 
> Yes, I saw that.
> 
> So think about it: if a CONFIG_ item is not present, what does that mean
> for the code which is enclosed around it?

Ignored by compiler.

I thought we usually need to introduce the kernel config option, then
add code related to it, so that is a wrong idea. It would be helpful to
tell this somewhere in document.


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WARNING: multiple messages have this Message-ID (diff)
From: Baoquan He <bhe@redhat.com>
To: Borislav Petkov <bp@alien8.de>
Cc: Eric DeVolder <eric.devolder@oracle.com>,
	linux-kernel@vger.kernel.org, x86@kernel.org,
	kexec@lists.infradead.org, ebiederm@xmission.com,
	dyoung@redhat.com, vgoyal@redhat.com, tglx@linutronix.de,
	mingo@redhat.com, dave.hansen@linux.intel.com, hpa@zytor.com,
	nramas@linux.microsoft.com, thomas.lendacky@amd.com,
	robh@kernel.org, efault@gmx.de, rppt@kernel.org,
	david@redhat.com, sourabhjain@linux.ibm.com,
	konrad.wilk@oracle.com, boris.ostrovsky@oracle.com
Subject: Re: [PATCH v14 3/7] crash: add generic infrastructure for crash hotplug support
Date: Wed, 7 Dec 2022 21:57:48 +0800	[thread overview]
Message-ID: <Y5Cb3KGDXijyBXfM@MiWiFi-R3L-srv> (raw)
In-Reply-To: <Y5CKNqtDm5VT+gsz@zn.tnic>

On 12/07/22 at 01:42pm, Borislav Petkov wrote:
> On Wed, Dec 07, 2022 at 08:36:13PM +0800, Baoquan He wrote:
> > Below is my last reply to Eric about my thinking on this.
> 
> Yes, I saw that.
> 
> So think about it: if a CONFIG_ item is not present, what does that mean
> for the code which is enclosed around it?

Ignored by compiler.

I thought we usually need to introduce the kernel config option, then
add code related to it, so that is a wrong idea. It would be helpful to
tell this somewhere in document.


  reply	other threads:[~2022-12-07 13:58 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-16 21:46 [PATCH v14 0/7] crash: Kernel handling of CPU and memory hot un/plug Eric DeVolder
2022-11-16 21:46 ` Eric DeVolder
2022-11-16 21:46 ` [PATCH v14 1/7] crash: move crash_prepare_elf64_headers() Eric DeVolder
2022-11-16 21:46   ` Eric DeVolder
2022-11-16 21:46 ` [PATCH v14 2/7] crash: prototype change for crash_prepare_elf64_headers() Eric DeVolder
2022-11-16 21:46   ` Eric DeVolder
2022-11-16 21:46 ` [PATCH v14 3/7] crash: add generic infrastructure for crash hotplug support Eric DeVolder
2022-11-16 21:46   ` Eric DeVolder
2022-11-25  3:26   ` Baoquan He
2022-11-25  3:26     ` Baoquan He
2022-11-28 15:46     ` Eric DeVolder
2022-11-28 15:46       ` Eric DeVolder
2022-11-29  0:43       ` Baoquan He
2022-11-29  0:43         ` Baoquan He
2022-12-07 10:00     ` Borislav Petkov
2022-12-07 10:00       ` Borislav Petkov
2022-12-07 12:36       ` Baoquan He
2022-12-07 12:36         ` Baoquan He
2022-12-07 12:42         ` Borislav Petkov
2022-12-07 12:42           ` Borislav Petkov
2022-12-07 13:57           ` Baoquan He [this message]
2022-12-07 13:57             ` Baoquan He
2022-12-07 15:56             ` Borislav Petkov
2022-12-07 15:56               ` Borislav Petkov
2022-12-08  4:03               ` Baoquan He
2022-12-08  4:03                 ` Baoquan He
2022-12-07 10:15   ` Borislav Petkov
2022-12-07 10:15     ` Borislav Petkov
2022-12-08 19:04     ` Eric DeVolder
2022-12-08 19:04       ` Eric DeVolder
2022-11-16 21:46 ` [PATCH v14 4/7] kexec: exclude elfcorehdr from the segment digest Eric DeVolder
2022-11-16 21:46   ` Eric DeVolder
2022-11-16 21:46 ` [PATCH v14 5/7] kexec: exclude hot remove cpu from elfcorehdr notes Eric DeVolder
2022-11-16 21:46   ` Eric DeVolder
2022-11-16 21:46 ` [PATCH v14 6/7] crash: memory and cpu hotplug sysfs attributes Eric DeVolder
2022-11-16 21:46   ` Eric DeVolder
2022-11-16 21:46 ` [PATCH v14 7/7] x86/crash: add x86 crash hotplug support Eric DeVolder
2022-11-16 21:46   ` Eric DeVolder
2022-12-07 10:19   ` Borislav Petkov
2022-12-07 10:19     ` Borislav Petkov
2022-12-08 20:34     ` Eric DeVolder
2022-12-08 20:34       ` Eric DeVolder
2022-11-23 15:31 ` [PATCH v14 0/7] crash: Kernel handling of CPU and memory hot un/plug Sourabh Jain
2022-11-23 15:31   ` Sourabh Jain

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