426b9269b8
We should use PatchXX to apply upstream kdump-utils patches instead of directly merge them into git. Resolves: RHEL-36415 Resolves: RHEL-37670 Upstream: https://github.com/rhkdump/kdump-utils/ Conflict: None Signed-off-by: Lichen Liu <lichliu@redhat.com>
48 lines
1.9 KiB
Diff
48 lines
1.9 KiB
Diff
From 659e0aae8f00570c85e82e1317153bf89e59929c Mon Sep 17 00:00:00 2001
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From: Baoquan He <bhe@redhat.com>
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Date: Thu, 7 Sep 2023 10:37:20 -0500
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Subject: [PATCH 5/7] update 98-kexec rules for crash hotplug
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In kernel, with the support of cpu/memory hotplug on crash, kdump
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reloading only needs to update the elfcorehdr.
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To realize the benefits, we need prevent udev from updating kdump
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kernel on hot un/plug changes when detecting that the crash_hotplug
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sysfs nodes are present.
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Link: https://lore.kernel.org/lkml/20230814214446.6659-1-eric.devolder@oracle.com/
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Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d68b4b6f307d155475cce541f2aee938032ed22e
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Signed-off-by: Baoquan He <bhe@redhat.com>
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---
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98-kexec.rules | 4 ++++
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98-kexec.rules.ppc64 | 4 ++++
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2 files changed, 8 insertions(+)
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diff --git a/98-kexec.rules b/98-kexec.rules
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index b73b701..52b2ee8 100644
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--- a/98-kexec.rules
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+++ b/98-kexec.rules
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@@ -1,3 +1,7 @@
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+# The kernel updates the crash elfcorehdr for CPU and memory changes
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+SUBSYSTEM=="cpu", ATTRS{crash_hotplug}=="1", GOTO="kdump_reload_end"
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+SUBSYSTEM=="memory", ATTRS{crash_hotplug}=="1", GOTO="kdump_reload_end"
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+
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SUBSYSTEM=="cpu", ACTION=="add", GOTO="kdump_reload"
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SUBSYSTEM=="cpu", ACTION=="remove", GOTO="kdump_reload"
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SUBSYSTEM=="memory", ACTION=="online", GOTO="kdump_reload"
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diff --git a/98-kexec.rules.ppc64 b/98-kexec.rules.ppc64
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index e9db276..e7735b3 100644
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--- a/98-kexec.rules.ppc64
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+++ b/98-kexec.rules.ppc64
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@@ -1,3 +1,7 @@
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+# The kernel updates the crash elfcorehdr for CPU and memory changes
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+SUBSYSTEM=="cpu", ATTRS{crash_hotplug}=="1", GOTO="kdump_reload_end"
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+SUBSYSTEM=="memory", ATTRS{crash_hotplug}=="1", GOTO="kdump_reload_end"
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+
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SUBSYSTEM=="cpu", ACTION=="online", GOTO="kdump_reload_cpu"
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SUBSYSTEM=="memory", ACTION=="online", GOTO="kdump_reload_mem"
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SUBSYSTEM=="memory", ACTION=="offline", GOTO="kdump_reload_mem"
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--
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2.44.0
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