Hi,
On Wed, 13 Sept 2023 at 08:54, Pingfan Liu wrote:
>
> On Mon, Sep 11, 2023 at 6:37 PM Dave Young wrote:
> >
> > kexec_file_load support of zboot kernel image decompressed the vmlinuz,
> > so in kexec_load code just load the kernel with reading the decompressed
> > kernel fd into a new buffer
On Mon, Sep 11, 2023 at 6:37 PM Dave Young wrote:
>
> kexec_file_load support of zboot kernel image decompressed the vmlinuz,
> so in kexec_load code just load the kernel with reading the decompressed
> kernel fd into a new buffer and use it directly.
>
> Signed-off-by: Dave Young
> ---
> includ
Hello:
This series was applied to riscv/linux.git (fixes)
by Palmer Dabbelt :
On Thu, 7 Sep 2023 18:33:01 +0800 you wrote:
> Hi,
>
> I had posted 2 patches [1][2] for riscv/kexec, but there was no "effective"
> response to them until now, so I merged them in this series with the 3rd
> fixup.
>
> These are sort of "tautological" arguments. There must be some
> objective reasons why this architecture was chosen instead of
> other (i.e. using what already pre-exists).
I think I misunderstood you in my earlier reply. I do not understand in what
way you think my arguments are tautological
> These are sort of "tautological" arguments. There must be some
> objective reasons why this architecture was chosen instead of
> other (i.e. using what already pre-exists).
You mean like your argument that the same can already be achieved with the
normal EFI stub and builin initrd/cmdline? ;)
> By the way, could you provide detailed steps about how to test this
> patchset so that people interested can give it a shot?
Sure.
0. Build and run your kernel with my patches.
1. You're gonna need a UKI to kexec. I personally use sbctl or ukify to create
them.
sbctl command example (assumes
On Tue Sep 12, 2023 at 9:56 PM EEST, Jan Hendrik Farr wrote:
> > What sort of bottleneck does the EFI stub have so that we need yet
> > another envelope?
>
> Well I can come up with a few advantages of UKI compared to normal bzImage
> with builtin initrd and cmdline.
>
> 1. You already identified
> What sort of bottleneck does the EFI stub have so that we need yet
> another envelope?
Well I can come up with a few advantages of UKI compared to normal bzImage with
builtin initrd and cmdline.
1. You already identified this one. Using addons to adjust your cmdline
2. I can use my normal init
Hi Pingfan,
kernel test robot noticed the following build errors:
[auto build test ERROR on powerpc/fixes]
[also build test ERROR on linus/master v6.6-rc1 next-20230912]
[cannot apply to powerpc/next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting
On Tue Sep 12, 2023 at 6:32 PM EEST, Jan Hendrik Farr wrote:
> >> The format itself is rather simple. It's just a PE file (as required
> >> by the UEFI spec) that contains a small stub application in the .text,
> >> .data, etc sections that is responsible for invoking the contained
> >> kernel and
On Tue, Sep 12, 2023, at 12:33 PM, Jarkko Sakkinen wrote:
> On Tue Sep 12, 2023 at 1:54 AM EEST, Jan Hendrik Farr wrote:
>> > What the heck is UKI?
>>
>> UKI (Unified Kernel Image) is the kernel image + initrd + cmdline (+
>> some other optional stuff) all packaged up together as one EFI
>> appl
On Tue Sep 12, 2023 at 2:20 AM EEST, Neal Gompa wrote: > On Mon, Sep 11, 2023
at 7:15 PM Jarkko Sakkinen wrote:
> > On Sat Sep 9, 2023 at 7:18 PM EEST, Jan Hendrik Farr wrote:
> > > Hello,
> > >
> > > this patch implements UKI support for kexec_file_load. It will require
> > > support
> > > in t
On Tue Sep 12, 2023 at 1:54 AM EEST, Jan Hendrik Farr wrote:
> > What the heck is UKI?
>
> UKI (Unified Kernel Image) is the kernel image + initrd + cmdline (+
> some other optional stuff) all packaged up together as one EFI
> application.
>
> This EFI application can then be launched directly by t
On 11/09/23 4:01 pm, Baoquan He wrote:
On 09/11/23 at 05:13pm, Michael Ellerman wrote:
Hari Bathini writes:
Currently, is_kdump_kernel() returns true when elfcorehdr_addr is set.
While elfcorehdr_addr is set for kexec based kernel dump mechanism,
alternate dump capturing methods like fadump
Currently, is_kdump_kernel() returns true in crash dump capture kernel
for both kdump and fadump crash dump capturing methods, as both these
methods set elfcorehdr_addr. Some restrictions enforced for crash dump
capture kernel, based on is_kdump_kernel(), are specifically meant for
kdump case and n
Currently, is_kdump_kernel() returns true when elfcorehdr_addr is set.
While elfcorehdr_addr is set for kexec based kernel dump mechanism,
alternate dump capturing methods like fadump [1] also set it to export
the vmcore. Since, is_kdump_kernel() is used to restrict resources in
crash dump capture
On 12.09.23 09:47, Adrian Hunter wrote:
On 12/09/23 10:19, David Hildenbrand wrote:
On 11.09.23 13:21, Adrian Hunter wrote:
Support for unaccepted memory was added recently, refer commit dcdfdd40fa82
("mm: Add support for unaccepted memory"), whereby a virtual machine may
need to accept memory
On 12/09/23 10:19, David Hildenbrand wrote:
> On 11.09.23 13:21, Adrian Hunter wrote:
>> Support for unaccepted memory was added recently, refer commit dcdfdd40fa82
>> ("mm: Add support for unaccepted memory"), whereby a virtual machine may
>> need to accept memory before it can be used.
>>
>> Do n
On 11.09.23 13:21, Adrian Hunter wrote:
Support for unaccepted memory was added recently, refer commit dcdfdd40fa82
("mm: Add support for unaccepted memory"), whereby a virtual machine may
need to accept memory before it can be used.
Do not let /proc/vmcore try to access unaccepted memory becaus
On 11.09.23 13:21, Adrian Hunter wrote:
Support for unaccepted memory was added recently, refer commit dcdfdd40fa82
("mm: Add support for unaccepted memory"), whereby a virtual machine may
need to accept memory before it can be used.
Do not let /proc/vmcore try to access unaccepted memory becaus
On 11.09.23 13:21, Adrian Hunter wrote:
Support for unaccepted memory was added recently, refer commit
dcdfdd40fa82 ("mm: Add support for unaccepted memory"), whereby a virtual
machine may need to accept memory before it can be used.
Do not try to access unaccepted memory because it can cause th
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