Re: [PATCH v2 0/5] arm64: crash: Add crash hotplug support

[Catalin Marinas <catalin.marinas@arm.com>]

On Wed, Jul 29, 2026 at 11:12:30AM +0800, Jinjie Ruan wrote:
> When CPU or memory hotplug events occur, the elfcorehdr in the kdump
> image becomes stale, potentially leading to incomplete crash dumps.
> 
> Currently, userspace udev rules reload the entire kdump image upon such
> events, which is inefficient and leaves kdump inactive for a long time.
> 
> Commit 247262756121 ("crash: add generic infrastructure for crash hotplug
> support") introduced a kernel mechanism to update only the elfcorehdr.
> This patch set implements crash hotplug support for arm64.
> 
> As Baoquan suggested, it also addresses and fixes several
> pre-existing code issues and Sashiko AI review findings extracted
> from the previous patch set.
> 
> The major improvements and fixes included in this series are:
> - Fix several memory leaks for arm64.
> - Simplify arm64 load_other_segments().
> - Implement infrastructure for arm64 crash memory hotplug support.
> 
> This patch set is rebased on liveupdate/crashkernel-cma.
> 
> Link: https://lore.kernel.org/all/20260601094805.2928614-1-ruanjinjie@huawei.com/

Is there any dependency for the first 3 patches on the above branch?
Patches 2/3 look like fixes and they depend on patch 1. Not sure about
cc stable, maybe patch 2.

[...]

> Jinjie Ruan (5):
>   kexec: Extract kexec_free_segment_cma() from kimage_free_cma()
>   arm64: kexec_file: Fix CMA page leaks in segment placement retry loops
>   arm64: kexec_file: Fix image->elf_headers memory leak in retry loop
>   arm64: kexec_file: Simplify load_other_segments()
>   arm64: crash: Add crash hotplug support

-- 
Catalin