linux-kernel - Re: [Crash-utility] [PATCH 0/5] Fixups to work with crash tool

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Date:   Fri, 22 Jul 2022 16:13:23 +0800
From:   Dave Young <dyoung@...hat.com>
To:     "Discussion list for crash utility usage, maintenance and development" 
        <crash-utility@...hat.com>
Cc:     paul.walmsley@...ive.com, palmer@...belt.com,
        aou@...s.berkeley.edu, anup@...infault.org, heiko@...ech.de,
        guoren@...nel.org, mick@....forth.gr,
        alexandre.ghiti@...onical.com, huanyi.xj@...baba-inc.com,
        hschauhan@...ltrace.org,
        Xianting Tian <xianting.tian@...ux.alibaba.com>,
        linux-kernel@...r.kernel.org, heinrich.schuchardt@...onical.com,
        linux-riscv@...ts.infradead.org, kexec@...ts.infradead.org
Subject: Re: [Crash-utility] [PATCH 0/5] Fixups to work with crash tool

Hi,

On Sun, 17 Jul 2022 at 18:13, Xianting Tian
<xianting.tian@...ux.alibaba.com> wrote:
>
> I ever sent the patch 1,2 in the link:
> https://patchwork.kernel.org/project/linux-riscv/patch/20220708073150.352830-2-xianting.tian@linux.alibaba.com/
> https://patchwork.kernel.org/project/linux-riscv/patch/20220708073150.352830-3-xianting.tian@linux.alibaba.com/
> And patch 3,4 in the link:
> https://patchwork.kernel.org/project/linux-riscv/patch/20220714113300.367854-2-xianting.tian@linux.alibaba.com/
> https://patchwork.kernel.org/project/linux-riscv/patch/20220714113300.367854-3-xianting.tian@linux.alibaba.com/
>
> This patch series just put these patches together, and with a new patch 5.
> these five patches are the fixups for kexec, vmcore and improvements
> for vmcoreinfo and memory layout dump.
>
> The main changes in the five patchs as below,
> Patch 1: Add a fast call path of crash_kexec() as other Arch(x86, arm64) do.
> Patch 2: use __smp_processor_id() instead of smp_processor_id() to cleanup
>          the console prints.
> Patch 3: Add VM layout, va bits, ram base to vmcoreinfo, which can simplify
>          the development of crash tool as ARM64 already did
>          (arch/arm64/kernel/crash_core.c).
> Patch 4: Add modules to virtual kernel memory layout dump.
> Patch 5: Fixup to get correct kernel mode PC for vmcore
>
> With these 5 patches(patch 3 is must), crash tool can work well to analyze
> a vmcore. The patches for crash tool for RISCV64 is in the link:
> https://lore.kernel.org/linux-riscv/20220717042929.370022-1-xianting.tian@linux.alibaba.com/
>
> Xianting Tian (5):
>   RISC-V: Fixup fast call of crash_kexec()
>   RISC-V: use __smp_processor_id() instead of smp_processor_id()
>   RISC-V: Add arch_crash_save_vmcoreinfo support

Vmcoreinfo changes need to be documented in
Documentation/admin-guide/kdump/vmcoreinfo.rst

Otherwise, I suggest to always cc kexec mail list (added in cc) for
kexec | kdump patches.

>   riscv: Add modules to virtual kernel memory layout dump
>   RISC-V: Fixup getting correct current pc
>
>  arch/riscv/kernel/Makefile          |  1 +
>  arch/riscv/kernel/crash_core.c      | 29 +++++++++++++++++++++++++++++
>  arch/riscv/kernel/crash_save_regs.S |  2 +-
>  arch/riscv/kernel/machine_kexec.c   |  2 +-
>  arch/riscv/kernel/traps.c           |  4 ++++
>  arch/riscv/mm/init.c                |  4 ++++
>  6 files changed, 40 insertions(+), 2 deletions(-)
>  create mode 100644 arch/riscv/kernel/crash_core.c
>
> --
> 2.17.1
>
> --
> Crash-utility mailing list
> Crash-utility@...hat.com
> https://listman.redhat.com/mailman/listinfo/crash-utility
> Contribution Guidelines: https://github.com/crash-utility/crash/wiki
>

Thanks
Dave

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