From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: David Hildenbrand <david@redhat.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Andrew Morton <akpm@linux-foundation.org>,
Baoquan He <bhe@redhat.com>, Borislav Petkov <bp@alien8.de>,
Brijesh Singh <brijesh.singh@amd.com>,
Daniel Vetter <daniel.vetter@ffwll.ch>,
Dan Williams <dan.j.williams@intel.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Dave Young <dyoung@redhat.com>,
Eric Biederman <ebiederm@xmission.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>,
Keith Busch <keith.busch@intel.com>,
Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
Michal Hocko <mhocko@suse.com>,
Oscar Salvador <osalvador@suse.de>, Qian Cai <cai@lca.pw>,
Thomas Gleixner <tglx@linutronix.de>,
Tom Lendacky <thomas.lendacky@amd.com>,
Vivek Goyal <vgoyal@redhat.com>
Subject: Re: [PATCH v1 0/3] kernel/resource: make walk_system_ram_res() and walk_mem_res() search the whole tree
Date: Tue, 23 Mar 2021 13:05:12 +0200 [thread overview]
Message-ID: <YFnLaLsTRv8T9fPe@smile.fi.intel.com> (raw)
In-Reply-To: <20210322160200.19633-1-david@redhat.com>
On Mon, Mar 22, 2021 at 05:01:57PM +0100, David Hildenbrand wrote:
> Playing with kdump+virtio-mem I noticed that kexec_file_load() does not
> consider System RAM added via dax/kmem and virtio-mem when preparing the
> elf header for kdump. Looking into the details, the logic used in
> walk_system_ram_res() and walk_mem_res() seems to be outdated.
>
> walk_system_ram_range() already does the right thing, let's change
> walk_system_ram_res() and walk_mem_res(), and clean up.
>
> Loading a kdump kernel via "kexec -p -s" ... will result in the kdump
> kernel to also dump dax/kmem and virtio-mem added System RAM now.
>
> Note: kexec-tools on x86-64 also have to be updated to consider this
> memory in the kexec_load() case when processing /proc/iomem.
> Against next-20210322.
Hint: `git format-patch --base ...`
>
> David Hildenbrand (3):
> kernel/resource: make walk_system_ram_res() find all busy
> IORESOURCE_SYSTEM_RAM resources
> kernel/resource: make walk_mem_res() find all busy IORESOURCE_MEM
> resources
> kernel/resource: remove first_lvl / siblings_only logic
>
> kernel/resource.c | 45 ++++++++++++---------------------------------
> 1 file changed, 12 insertions(+), 33 deletions(-)
>
> --
> 2.29.2
>
--
With Best Regards,
Andy Shevchenko
prev parent reply other threads:[~2021-03-23 11:06 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-22 16:01 [PATCH v1 0/3] kernel/resource: make walk_system_ram_res() and walk_mem_res() search the whole tree David Hildenbrand
2021-03-22 16:01 ` [PATCH v1 1/3] kernel/resource: make walk_system_ram_res() find all busy IORESOURCE_SYSTEM_RAM resources David Hildenbrand
2021-03-22 16:01 ` David Hildenbrand
2021-03-22 16:10 ` Dan Williams
2021-03-22 16:10 ` Dan Williams
2021-03-22 16:10 ` Dan Williams
2021-03-23 9:40 ` David Hildenbrand
2021-03-23 9:40 ` David Hildenbrand
2021-03-23 11:07 ` Andy Shevchenko
2021-03-23 11:07 ` Andy Shevchenko
2021-03-23 11:06 ` Andy Shevchenko
2021-03-23 11:06 ` Andy Shevchenko
2021-03-23 11:25 ` David Hildenbrand
2021-03-23 11:25 ` David Hildenbrand
2021-03-23 14:33 ` Baoquan He
2021-03-23 14:33 ` Baoquan He
2021-03-24 11:18 ` Oscar Salvador
2021-03-24 11:18 ` Oscar Salvador
2021-03-24 11:28 ` David Hildenbrand
2021-03-24 11:28 ` David Hildenbrand
2021-03-22 16:01 ` [PATCH v1 2/3] kernel/resource: make walk_mem_res() find all busy IORESOURCE_MEM resources David Hildenbrand
2021-03-22 16:01 ` David Hildenbrand
2021-03-22 16:11 ` Dan Williams
2021-03-22 16:11 ` Dan Williams
2021-03-22 16:11 ` Dan Williams
2021-03-23 11:08 ` Andy Shevchenko
2021-03-23 11:08 ` Andy Shevchenko
2021-03-23 11:26 ` David Hildenbrand
2021-03-23 11:26 ` David Hildenbrand
2021-03-22 16:02 ` [PATCH v1 3/3] kernel/resource: remove first_lvl / siblings_only logic David Hildenbrand
2021-03-22 16:02 ` David Hildenbrand
2021-03-22 16:12 ` Dan Williams
2021-03-22 16:12 ` Dan Williams
2021-03-22 16:12 ` Dan Williams
2021-03-23 11:11 ` Andy Shevchenko
2021-03-23 11:11 ` Andy Shevchenko
2021-03-23 11:19 ` David Hildenbrand
2021-03-23 11:19 ` David Hildenbrand
2021-03-23 11:05 ` Andy Shevchenko [this message]
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