linux-kernel - Re: [PATCH 1/1] kernel/crash_core.c - Add crashkernel=auto for x86 and ARM

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20201123034705.GA5908@dhcp-128-65.nay.redhat.com>
Date:   Mon, 23 Nov 2020 11:47:05 +0800
From:   Dave Young <dyoung@...hat.com>
To:     Guilherme Piccoli <gpiccoli@...onical.com>
Cc:     Kairui Song <kasong@...hat.com>,
        Saeed Mirzamohammadi <saeed.mirzamohammadi@...cle.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        linux-doc@...r.kernel.org,
        Catalin Marinas <catalin.marinas@....com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        "H. Peter Anvin" <hpa@...or.com>, Will Deacon <will@...nel.org>,
        Anson Huang <Anson.Huang@....com>,
        Jonathan Corbet <corbet@....net>,
        the arch/x86 maintainers <x86@...nel.org>,
        Michael Walle <michael@...le.cc>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Vivek Goyal <vgoyal@...hat.com>,
        John Donnelly <john.p.donnelly@...cle.com>,
        Arnd Bergmann <arnd@...db.de>, Borislav Petkov <bp@...en8.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-arm-kernel@...ts.infradead.org, Baoquan He <bhe@...hat.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        kexec mailing list <kexec@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "# v4 . 16+" <stable@...r.kernel.org>,
        Li Yang <leoyang.li@....com>,
        Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
        Vinod Koul <vkoul@...nel.org>,
        Diego Elio Pettenò <flameeyes@...meeyes.com>,
        Olof Johansson <olof@...om.net>,
        Shawn Guo <shawnguo@...nel.org>
Subject: Re: [PATCH 1/1] kernel/crash_core.c - Add crashkernel=auto for x86
 and ARM

Hi Guilherme,
On 11/22/20 at 12:32pm, Guilherme Piccoli wrote:
> Hi Dave and Kairui, thanks for your responses! OK, if that makes sense
> to you I'm fine with it. I'd just recommend to test recent kernels in
> multiple distros with the minimum "range" to see if 64M is enough for
> crashkernel, maybe we'd need to bump that.

Giving the different kernel configs and the different userspace
initramfs setup it is hard to get an uniform value for all distributions,
but we can have an interface/kconfig-option for them to provide a value like this patch
is doing. And it could be improved like Kairui said about some known
kernel added extra values later, probably some more improvements if
doable.

Thanks
Dave