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Date:   Mon, 11 Jan 2021 10:16:03 +0100
From:   "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>
To:     Baoquan He <bhe@redhat.com>
Cc:     HAGIO =?utf-8?B?S0FaVUhJVE8o6JCp5bC+44CA5LiA5LuBKQ==?= 
        <k-hagio-ab@nec.com>, "lijiang@redhat.com" <lijiang@redhat.com>,
        "kexec@lists.infradead.org" <kexec@lists.infradead.org>,
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        "ebiederm@xmission.com" <ebiederm@xmission.com>,
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        "vgoyal@redhat.com" <vgoyal@redhat.com>,
        "keescook@chromium.org" <keescook@chromium.org>,
        Alexander Egorenkov <egorenar@linux.ibm.com>
Subject: Re: [PATCH v3 1/1] kdump: append uts_namespace.name offset to
 VMCOREINFO
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On Fri, Jan 08, 2021 at 06:22:24PM +0800, Baoquan He wrote:
> On 01/08/21 at 10:07am, HAGIO KAZUHITO(萩尾 一仁) wrote:
> > Hi Baoquan,
> > 
> > -----Original Message-----
> > > On 09/30/20 at 12:23pm, Alexander Egorenkov wrote:
> > > > The offset of the field 'init_uts_ns.name' has changed
> > > > since commit 9a56493f6942 ("uts: Use generic ns_common::count").
> > > 
> > > This patch is merged into 5.11-rc1, but we met the makedumpfile failure
> > > of kdump test case in 5.10.0 kernel. Should affect 5.9 too since
> > > commit 9a56493f6942 is merged into 5.9-rc2.
> > 
> > Hmm, commit 9a56493f6942 should have been merged into 5.11-rc1
> > together with commit ca4a9241cc5e.
> 
> Checked on master branch of mainline kernel, commit 9a56493f6942 is in
> 5.9-rc1.


No, that commit is in 5.11-rc1, not 5.9-rc1:
	$ git describe --contains 9a56493f6942
	v5.11-rc1~182^2~9

> commit ca4a9241cc5e is merged into 5.11-rc1.
> 
> commit 9a56493f6942c0e2df1579986128721da96e00d8
> Author: Kirill Tkhai <ktkhai@virtuozzo.com>
> Date:   Mon Aug 3 13:16:21 2020 +0300
> 
>     uts: Use generic ns_common::count
> 
> 
> commit ca4a9241cc5e718de86a34afd41972869546a5e3
> Author: Alexander Egorenkov <egorenar@linux.ibm.com>
> Date:   Tue Dec 15 20:45:31 2020 -0800
> 
>     kdump: append uts_namespace.name offset to VMCOREINFO


Are you all sure this is needed in 5.10.y?

thanks,

greg k-h