From: Baoquan He <bhe@redhat.com>
To: Borislav Petkov <bp@alien8.de>
Cc: Thomas.Lendacky@amd.com, x86@kernel.org,
lijiang <lijiang@redhat.com>,
peterz@infradead.org, dave.hansen@linux.intel.com,
kexec@lists.infradead.org, linux-kernel@vger.kernel.org,
mingo@redhat.com, luto@kernel.org, hpa@zytor.com,
tglx@linutronix.de, dyoung@redhat.com, akpm@linux-foundation.org
Subject: Re: [PATCH 0/3 v11] add reserved e820 ranges to the kdump kernel e820 table
Date: Sat, 8 Jun 2019 18:26:59 +0800 [thread overview]
Message-ID: <20190608102659.GA9130@MiWiFi-R3L-srv> (raw)
In-Reply-To: <20190608100623.GA9138@zn.tnic>
On 06/08/19 at 12:06pm, Borislav Petkov wrote:
> On Sat, Jun 08, 2019 at 06:01:39PM +0800, Baoquan He wrote:
> > OK, it may be different with the case we met, if panic happened when
> > load a kdump kernel.
> >
> > We can load with 'kexec -l' or 'kexec -p', but can't boot after triggering
> > crash or execute 'kexec -e' to do kexec jumping.
>
> No, I load a kdump kernel properly with this command:
>
> kexec -s -p /boot/vmlinuz-5.2.0-rc3+ --initrd=/boot/initrd.img-5.2.0-rc3+ --command-line="maxcpus=1 root=/dev/sda5 ro debug ignore_loglevel
> log_buf_len=16M no_console_suspend net.ifnames=0 systemd.log_target=null mem_encrypt=on kvm_amd.sev=1 nr_cpus=1 irqpoll reset_devices vga=normal
> LANG=en_US.UTF-8 earlyprintk=serial cgroup_disable=memory mce=off numa=off udev.children-max=2 panic=10 rootflags=nofail acpi_no_memhotplug
> transparent_hugepage=never disable_cpu_apicid=0"
>
> And that succeeds judging from
>
> $ grep . /sys/kernel/kexec_*
>
> Then I trigger a panic with
>
> echo c > /proc/sysrq-trigger
>
> and this is where it hangs and doesn't load the kdump kernel.
OK, I see. Then it should be the issue we have met and talked about with
Tom.
https://lkml.kernel.org/r/20190604134952.GC26891@MiWiFi-R3L-srv
You can apply Tom's patch as below. I tested it, it can make kexec
kernel succeed to boot, but failed for kdump kernel booting. The kdump
kernel can boot till the end of kernel initialization, then hang with a
call trace. I have pasted the log in the above thread. Haven't got the
reason.
http://lkml.kernel.org/r/508c2853-dc4f-70a6-6fa8-97c950dc31c6@amd.com
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WARNING: multiple messages have this Message-ID (diff)
From: Baoquan He <bhe@redhat.com>
To: Borislav Petkov <bp@alien8.de>
Cc: lijiang <lijiang@redhat.com>,
linux-kernel@vger.kernel.org, kexec@lists.infradead.org,
tglx@linutronix.de, mingo@redhat.com, akpm@linux-foundation.org,
dave.hansen@linux.intel.com, luto@kernel.org,
peterz@infradead.org, x86@kernel.org, hpa@zytor.com,
dyoung@redhat.com, Thomas.Lendacky@amd.com
Subject: Re: [PATCH 0/3 v11] add reserved e820 ranges to the kdump kernel e820 table
Date: Sat, 8 Jun 2019 18:26:59 +0800 [thread overview]
Message-ID: <20190608102659.GA9130@MiWiFi-R3L-srv> (raw)
In-Reply-To: <20190608100623.GA9138@zn.tnic>
On 06/08/19 at 12:06pm, Borislav Petkov wrote:
> On Sat, Jun 08, 2019 at 06:01:39PM +0800, Baoquan He wrote:
> > OK, it may be different with the case we met, if panic happened when
> > load a kdump kernel.
> >
> > We can load with 'kexec -l' or 'kexec -p', but can't boot after triggering
> > crash or execute 'kexec -e' to do kexec jumping.
>
> No, I load a kdump kernel properly with this command:
>
> kexec -s -p /boot/vmlinuz-5.2.0-rc3+ --initrd=/boot/initrd.img-5.2.0-rc3+ --command-line="maxcpus=1 root=/dev/sda5 ro debug ignore_loglevel
> log_buf_len=16M no_console_suspend net.ifnames=0 systemd.log_target=null mem_encrypt=on kvm_amd.sev=1 nr_cpus=1 irqpoll reset_devices vga=normal
> LANG=en_US.UTF-8 earlyprintk=serial cgroup_disable=memory mce=off numa=off udev.children-max=2 panic=10 rootflags=nofail acpi_no_memhotplug
> transparent_hugepage=never disable_cpu_apicid=0"
>
> And that succeeds judging from
>
> $ grep . /sys/kernel/kexec_*
>
> Then I trigger a panic with
>
> echo c > /proc/sysrq-trigger
>
> and this is where it hangs and doesn't load the kdump kernel.
OK, I see. Then it should be the issue we have met and talked about with
Tom.
https://lkml.kernel.org/r/20190604134952.GC26891@MiWiFi-R3L-srv
You can apply Tom's patch as below. I tested it, it can make kexec
kernel succeed to boot, but failed for kdump kernel booting. The kdump
kernel can boot till the end of kernel initialization, then hang with a
call trace. I have pasted the log in the above thread. Haven't got the
reason.
http://lkml.kernel.org/r/508c2853-dc4f-70a6-6fa8-97c950dc31c6@amd.com
next prev parent reply other threads:[~2019-06-08 10:27 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-23 1:30 [PATCH 0/3 v11] add reserved e820 ranges to the kdump kernel e820 table Lianbo Jiang
2019-04-23 1:30 ` Lianbo Jiang
2019-04-23 1:30 ` [PATCH 1/3 v11] x86/e820, resource: add a new I/O resource descriptor 'IORES_DESC_RESERVED' Lianbo Jiang
2019-04-23 1:30 ` Lianbo Jiang
2019-06-20 9:59 ` [tip:x86/kdump] x86/e820, ioport: Add a new I/O resource descriptor IORES_DESC_RESERVED tip-bot for Lianbo Jiang
2019-04-23 1:30 ` [PATCH 2/3 v11] x86/mm: change the check condition in SEV because a new descriptor is introduced Lianbo Jiang
2019-04-23 1:30 ` Lianbo Jiang
2019-06-20 10:00 ` [tip:x86/kdump] x86/mm: Rework ioremap resource mapping determination tip-bot for Lianbo Jiang
2019-04-23 1:30 ` [PATCH 3/3 v11] x86/kexec_file: add reserved e820 ranges to kdump kernel e820 table Lianbo Jiang
2019-04-23 1:30 ` Lianbo Jiang
2019-06-20 10:01 ` [tip:x86/kdump] x86/crash: Add e820 reserved ranges to kdump kernel's " tip-bot for Lianbo Jiang
2019-05-28 7:30 ` [PATCH 0/3 v11] add reserved e820 ranges to the kdump kernel " lijiang
2019-05-28 7:30 ` lijiang
2019-06-07 17:42 ` Borislav Petkov
2019-06-07 17:42 ` Borislav Petkov
2019-06-08 3:54 ` Baoquan He
2019-06-08 3:54 ` Baoquan He
2019-06-08 9:10 ` Borislav Petkov
2019-06-08 9:10 ` Borislav Petkov
2019-06-08 10:01 ` Baoquan He
2019-06-08 10:01 ` Baoquan He
2019-06-08 10:06 ` Borislav Petkov
2019-06-08 10:06 ` Borislav Petkov
2019-06-08 10:26 ` Baoquan He [this message]
2019-06-08 10:26 ` Baoquan He
2019-06-10 11:37 ` Borislav Petkov
2019-06-10 11:37 ` Borislav Petkov
2019-06-12 1:14 ` lijiang
2019-06-12 1:14 ` lijiang
2019-06-12 1:55 ` Baoquan He
2019-06-12 1:55 ` Baoquan He
2019-06-12 5:49 ` Dave Young
2019-06-12 5:49 ` Dave Young
2019-06-12 15:10 ` Borislav Petkov
2019-06-12 15:10 ` Borislav Petkov
2019-06-12 16:52 ` Lendacky, Thomas
2019-06-12 16:52 ` Lendacky, Thomas
2019-06-12 18:07 ` Borislav Petkov
2019-06-12 18:07 ` Borislav Petkov
2019-06-12 19:10 ` Lendacky, Thomas
2019-06-12 19:10 ` Lendacky, Thomas
2019-06-13 15:07 ` Baoquan He
2019-06-13 15:07 ` Baoquan He
2019-06-13 1:18 ` dyoung
2019-06-13 1:18 ` dyoung
2019-06-09 4:02 ` lijiang
2019-06-09 4:02 ` lijiang
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