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From: Guilherme Piccoli <gpiccoli@canonical.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Bjorn Helgaas <helgaas@kernel.org>,
	lukas@wunner.de, linux-pci@vger.kernel.org,
	Pingfan Liu <kernelfans@gmail.com>,
	andi@firstfloor.org, "H. Peter Anvin" <hpa@zytor.com>,
	Baoquan He <bhe@redhat.com>,
	x86@kernel.org, Sinan Kaya <okaya@kernel.org>,
	Ingo Molnar <mingo@redhat.com>,
	Jay Vosburgh <jay.vosburgh@canonical.com>,
	Dave Young <dyoung@redhat.com>,
	Gavin Guo <gavin.guo@canonical.com>,
	Borislav Petkov <bp@alien8.de>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Guowen Shan <gshan@redhat.com>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	"Guilherme G. Piccoli" <kernel@gpiccoli.net>,
	kexec mailing list <kexec@lists.infradead.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Dan Streetman <ddstreet@canonical.com>,
	Vivek Goyal <vgoyal@redhat.com>
Subject: Re: [PATCH 1/3] x86/quirks: Scan all busses for early PCI quirks
Date: Mon, 16 Nov 2020 18:49:08 -0300	[thread overview]
Message-ID: <CAHD1Q_zk6Z841E1yAH-GKpDXQ=32YPb-R4Exo7UcNHnTY3bdqQ@mail.gmail.com> (raw)
In-Reply-To: <87a6vhht71.fsf@x220.int.ebiederm.org>

On Mon, Nov 16, 2020 at 6:45 PM Eric W. Biederman <ebiederm@xmission.com> wrote:
> The way to do that would be to collect the set of pci devices when the
> kexec on panic kernel is loaded, not during crash_kexec.  If someone
> performs a device hotplug they would need to reload the kexec on panic
> kernel.
>
> I am not necessarily endorsing that just pointing out how it can be
> done.
>
> Eric

Thanks Eric, I agree! I think if we use something like PKRAM (a more
dynamic approach) we could have the PCI hotplug path updating the data
to-be-passed to the crash kernel, so the crash kernel doesn't even
need to be loaded again.

  reply	other threads:[~2020-11-16 21:50 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-18 18:37 [PATCH 1/3] x86/quirks: Scan all busses for early PCI quirks Guilherme G. Piccoli
2018-10-18 18:37 ` [PATCH 2/3] x86/PCI: Export find_cap() to be used in early PCI code Guilherme G. Piccoli
2018-10-18 18:37 ` [PATCH 3/3] x86/quirks: Add parameter to clear MSIs early on boot Guilherme G. Piccoli
2018-10-18 20:08   ` Sinan Kaya
2018-10-18 20:13     ` Guilherme G. Piccoli
2018-10-18 20:30       ` Sinan Kaya
2018-10-22 19:44         ` Guilherme G. Piccoli
2018-10-18 22:15 ` [PATCH 1/3] x86/quirks: Scan all busses for early PCI quirks Bjorn Helgaas
2018-10-22 20:35   ` Guilherme G. Piccoli
2018-10-23 17:03     ` Bjorn Helgaas
2020-11-06 13:14       ` Guilherme G. Piccoli
2020-11-13 16:46         ` Bjorn Helgaas
2020-11-13 23:31           ` Thomas Gleixner
2020-11-13 23:40             ` Thomas Gleixner
2020-11-14 20:39               ` Bjorn Helgaas
2020-11-14 20:58                 ` Thomas Gleixner
2020-11-14 21:22                   ` Bjorn Helgaas
2020-11-15 14:05                     ` Eric W. Biederman
2020-11-15 14:29                       ` Eric W. Biederman
2020-11-15 15:11                         ` Thomas Gleixner
2020-11-15 17:01                           ` Lukas Wunner
2020-11-15 19:18                             ` Thomas Gleixner
2020-11-15 20:46                           ` Eric W. Biederman
2020-11-16 20:31                             ` Guilherme G. Piccoli
2020-11-16 21:45                               ` Eric W. Biederman
2020-11-16 21:49                                 ` Guilherme Piccoli [this message]
2020-11-17  0:19                               ` Bjorn Helgaas
2020-11-17  1:06                                 ` Eric W. Biederman
2020-11-17  9:53                                   ` Thomas Gleixner
2020-11-17 12:19                                     ` David Woodhouse
2020-11-17 19:34                                       ` Thomas Gleixner
2020-11-17 22:25                                         ` Eric W. Biederman
2020-11-17 12:04                                   ` Guilherme Piccoli
2020-11-18 21:05                                     ` Bjorn Helgaas
2020-11-18 22:36                                       ` Guilherme Piccoli
2020-11-30 20:20                                         ` Bjorn Helgaas
2020-12-14 18:32                                           ` Guilherme Piccoli

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