linux-kernel - Re: [PATCH] Revert "x86/apic/x2apic: Implement IPI shorthands support"

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <Y7zMZ8nCNtSt09kV@fedora>
Date:   Tue, 10 Jan 2023 10:24:39 +0800
From:   Baoquan He <bhe@...hat.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org,
        kexec@...ts.infradead.org
Subject: Re: [PATCH] Revert "x86/apic/x2apic: Implement IPI shorthands
 support"

On 01/09/23 at 10:59pm, Thomas Gleixner wrote:
> On Tue, Dec 20 2022 at 13:34, Baoquan He wrote:
> > This reverts commit 43931d350f30c6cd8c2f498d54ef7d65750abc92.
> >
> > On kvm guest with 4 cpus deployed, when adding 'nr_cpus=2' to normal
> > kernel's cmdline, and triggering crash to jump to kdump kernel, kdump
> > kernel will stably hang. Reverting commit 43931d350f30 ("x86/apic/x2apic:
> > Implement IPI shorthands support") can fix it.
> 
> Is there any output on the early console or hangs it silently?
> 
> If the latter, can you attach GDB to the guest and figure out where it
> is stuck?

No any output on the ealry console. I will try gdb debugging. Thanks.