From: Andrew Morton <akpm@linux-foundation.org>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Baoquan He <bhe@redhat.com>, David Hildenbrand <david@redhat.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Bhupesh Sharma <bhsharma@redhat.com>,
Anshuman Khandual <anshuman.khandual@arm.com>,
kexec@lists.infradead.org,
Russell King - ARM Linux admin <linux@armlinux.org.uk>,
linux-mm@kvack.org, James Morse <james.morse@arm.com>,
Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 1/3] kexec: Prevent removal of memory in use by a loaded kexec image
Date: Mon, 13 Apr 2020 16:01:44 -0700 [thread overview]
Message-ID: <20200413160144.0e07c0033afc474228bc9218@linux-foundation.org> (raw)
In-Reply-To: <871rorjzmc.fsf@x220.int.ebiederm.org>
On Mon, 13 Apr 2020 08:15:23 -0500 ebiederm@xmission.com (Eric W. Biederman) wrote:
> > For 3), people can still use kexec_load and develop/fix for it, if no
> > kexec_file_load supported. But 32-bit arm should be a different one,
> > more like i386, we will leave it as is, and fix anything which could
> > break it. But people really expects to improve or add feature to it? E.g
> > in this patchset, the mem hotplug issue James raised, I assume James is
> > focusing on arm64, x86_64, but not 32-bit arm. As DavidH commented in
> > another reply, people even don't agree to continue supporting memory
> > hotplug on 32-bit system. We ever took effort to fix a memory hotplug
> > bug on i386 with a patch, but people would rather set it as BROKEN.
>
> For memory hotplug just reload. Userspace already gets good events.
>
> We should not expect anything except a panic kernel to be loaded over a
> memory hotplug event. The kexec on panic code should actually be loaded
> in a location that we don't reliquish if asked for it.
Is that a nack for James's patchset?
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next prev parent reply other threads:[~2020-04-13 23:01 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200326180730.4754-1-james.morse@arm.com>
[not found] ` <20200330135522.GE6352@MiWiFi-R3L-srv>
[not found] ` <2bdfbb1c-49da-d476-4a38-f91937105ae3@arm.com>
[not found] ` <20200331034612.GB83248@dhcp-128-65.nay.redhat.com>
2020-04-14 17:31 ` [PATCH 0/3] kexec/memory_hotplug: Prevent removal and accidental use James Morse
2020-04-15 20:29 ` Eric W. Biederman
2020-04-22 12:14 ` James Morse
2020-04-22 13:04 ` Eric W. Biederman
2020-04-22 15:40 ` James Morse
[not found] ` <20200326180730.4754-2-james.morse@arm.com>
[not found] ` <321e6bf7-e898-7701-dd60-6c25237ff9cd@redhat.com>
[not found] ` <a21d90ea-2566-a2bc-ad2f-6464a416c97f@arm.com>
[not found] ` <9cb4ea0d-34c3-de42-4b3f-ee25a59c4835@redhat.com>
[not found] ` <b0443908-e36f-9bc4-4a8a-4206cb782d4b@arm.com>
[not found] ` <72672e2c-a57a-8df9-0cff-8035cbce7740@redhat.com>
[not found] ` <34274b02-60ba-eb78-eacd-6dc1146ed3cd@arm.com>
[not found] ` <80e4d1d7-f493-3f66-f700-86f18002d692@redhat.com>
[not found] ` <dfacf85f-d79d-8742-7a13-1ac0a67bad04@arm.com>
[not found] ` <ba481c82-c69e-043c-4b66-2d2c7732cf07@redhat.com>
2020-04-10 19:10 ` [PATCH 1/3] kexec: Prevent removal of memory in use by a loaded kexec image Andrew Morton
2020-04-11 3:44 ` Baoquan He
2020-04-11 9:30 ` Russell King - ARM Linux admin
2020-04-11 9:58 ` David Hildenbrand
2020-04-12 5:35 ` Baoquan He
2020-04-12 8:08 ` Russell King - ARM Linux admin
2020-04-12 19:52 ` Eric W. Biederman
2020-04-12 20:37 ` Bhupesh SHARMA
2020-04-13 2:37 ` Baoquan He
2020-04-13 13:15 ` Eric W. Biederman
2020-04-13 23:01 ` Andrew Morton [this message]
2020-04-14 6:13 ` Eric W. Biederman
2020-04-14 6:40 ` Baoquan He
2020-04-14 6:51 ` Baoquan He
2020-04-14 8:00 ` David Hildenbrand
2020-04-14 9:22 ` Baoquan He
2020-04-14 9:37 ` David Hildenbrand
2020-04-14 14:39 ` Baoquan He
2020-04-14 14:49 ` David Hildenbrand
2020-04-15 2:35 ` Baoquan He
2020-04-16 13:31 ` David Hildenbrand
2020-04-16 14:02 ` Baoquan He
2020-04-16 14:09 ` David Hildenbrand
2020-04-16 14:36 ` Baoquan He
2020-04-16 14:47 ` David Hildenbrand
2020-04-21 13:29 ` David Hildenbrand
2020-04-21 13:57 ` David Hildenbrand
2020-04-21 13:59 ` Eric W. Biederman
2020-04-21 14:30 ` David Hildenbrand
2020-04-22 9:17 ` Baoquan He
2020-04-22 9:24 ` David Hildenbrand
2020-04-22 9:57 ` Baoquan He
2020-04-22 10:05 ` David Hildenbrand
2020-04-22 10:36 ` Baoquan He
2020-04-14 9:16 ` Dave Young
2020-04-14 9:38 ` Dave Young
2020-04-14 7:05 ` David Hildenbrand
2020-04-14 16:55 ` James Morse
2020-04-14 17:41 ` David Hildenbrand
2020-04-15 20:33 ` Eric W. Biederman
2020-04-22 12:28 ` James Morse
2020-04-22 15:25 ` Eric W. Biederman
2020-04-22 16:40 ` David Hildenbrand
2020-04-23 16:29 ` Eric W. Biederman
2020-04-24 7:39 ` David Hildenbrand
2020-04-24 7:41 ` David Hildenbrand
2020-05-01 16:55 ` James Morse
[not found] ` <20200326180730.4754-3-james.morse@arm.com>
2020-04-02 5:49 ` [PATCH 2/3] mm/memory_hotplug: Allow arch override of non boot memory resource names Dave Young
2020-04-02 6:12 ` piliu
2020-04-14 17:21 ` James Morse
2020-04-15 20:36 ` Eric W. Biederman
2020-04-22 12:14 ` James Morse
2020-05-09 0:45 ` Andrew Morton
2020-05-11 8:35 ` David Hildenbrand
[not found] ` <20200326180730.4754-4-james.morse@arm.com>
2020-04-15 20:37 ` [PATCH 3/3] arm64: memory: Give hotplug memory a different resource name Eric W. Biederman
2020-04-22 12:14 ` James Morse
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