-Original Message-
> This change makes __exclude_unnecessary_pages() more robust by
> verifying that the order of a free page is valid before computing the size
> of its memory block in the buddy system.
>
> The order of a free page cannot be larger than (MAX_ORDER - 1) because
> the array
On 4/11/22 04:20, Baoquan He wrote:
Hi Eric,
On 04/01/22 at 02:30pm, Eric DeVolder wrote:
... ...
+static void crash_hotplug_handler(unsigned int hp_action,
+ unsigned long a, unsigned long b)
I am still struggling to consider if these unused parameters should be
kept or removed. Do
On 4/8/22 03:07, Baoquan He wrote:
On 04/01/22 at 02:30pm, Eric DeVolder wrote:
CRASH_HOTPLUG is to enable cpu and memory hotplug support of crash.
CRASH_HOTPLUG_ELFCOREHDR_SZ is used to specify the maximum size of
the elfcorehdr buffer/segment.
This is a preparation for later usage.
Signe
Hi Eric,
On 04/01/22 at 02:30pm, Eric DeVolder wrote:
... ...
> +static void crash_hotplug_handler(unsigned int hp_action,
> + unsigned long a, unsigned long b)
I am still struggling to consider if these unused parameters should be
kept or removed. Do you foresee or feel on which ARCH they c
On Fri, Apr 01, 2022 at 09:31:16AM +0800, Coiby Xu wrote:
> Currently there is no arch-specific implementation of
> arch_kexec_kernel_verify_sig. Even if we want to add an implementation
> for an architecture in the future, we can simply use "(struct
> kexec_file_ops*)->verify_sig". So clean it up.
On Fri, Apr 08, 2022 at 05:24:28PM +0800, Baoquan He wrote:
> Add Heiko to CC.
>
> On 04/08/22 at 05:06pm, Baoquan He wrote:
> > Copy the description of v3 cover letter from Willy:
> > ===
> > For some reason several people have been sending bad patches to fix
> > compiler warnings in vmcore recen
On Fri, Apr 01, 2022 at 09:31:18AM +0800, Coiby Xu wrote:
> Currently, a problem faced by arm64 is if a kernel image is signed by a
> MOK key, loading it via the kexec_file_load() system call would be
> rejected with the error "Lockdown: kexec: kexec of unsigned images is
> restricted; see man kern
On Fri, Apr 01, 2022 at 09:31:17AM +0800, Coiby Xu wrote:
> The code in bzImage64_verify_sig could make use of system keyrings
s/could make/makes/
> including .buitin_trusted_keys, .secondary_trusted_keys and .platform
> keyring to verify signed kernel image as PE file. Make it generic so
> both x8
This patch series implements the crash hotplug handler on PowerPC introduced
by https://lkml.org/lkml/2022/3/3/674 patch series.
The Problem:
Post hotplug/DLPAR events the capture kernel holds stale information about the
system. Dump collection with stale capture kernel might end up
Two new members fdt_index and fdt_index_valid are added in kimage_arch
struct to track the FDT kexec segment. These new members of kimage_arch
struct will help the crash hotplug handler to easily access the FDT
segment from the kexec segment array. Otherwise, we have to loop through
all kexec segme
Two major changes are done to enable the crash CPU hotplug handler.
Firstly, updated the kexec load path to prepare kimage for hotplug
changes, and secondly, implemented the crash hotplug handler.
On the kexec load path, the memsz allocation of the crash FDT segment
is updated to ensure that it ha
The option CRASH_HOTPLUG enables, in kernel update to kexec segments on
hotplug events.
All the updates needed on the capture kernel load path in the kernel for
both kexec_load and kexec_file_load system will be kept under this config.
Signed-off-by: Sourabh Jain
Reviewed-by: Eric DeVolder
---
Make the update_cpus_node function non-static and export it for
usage in other kexec components.
The update_cpus_node definition is moved to core_64.c so that it
can be used with both kexec_load and kexec_file_load system calls.
Signed-off-by: Sourabh Jain
---
arch/powerpc/include/asm/kexec.h
On Mon, Apr 11, 2022 at 09:52:18AM +0800, Coiby Xu wrote:
> On Mon, Apr 11, 2022 at 09:13:32AM +0800, Baoquan He wrote:
> > On 04/08/22 at 10:59am, Michal Suchánek wrote:
> > > On Fri, Apr 08, 2022 at 03:17:19PM +0800, Baoquan He wrote:
> > > > Hi Coiby,
> > > >
> > > > On 04/01/22 at 09:31am, Coib
The kernel changes needed for crash hotplug support for kexec_load system
calls are similar to kexec_file_load (which has already been implemented
in earlier patches) except for finding the index of the FDT segment in the
kexec segment array. Since the kexec segment array is prepared by the
kexec t
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