The patch titled
Subject: powernv/memtrace: always online added memory blocks
has been added to the -mm tree. Its filename is
powernv-memtrace-always-online-added-memory-blocks.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/powernv-memtrace-always-online-added-memory-blocks.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/powernv-memtrace-always-online-added-memory-blocks.patch
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------------------------------------------------------
From: David Hildenbrand <david@xxxxxxxxxx>
To: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-mm@xxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, linux-hyperv@xxxxxxxxxxxxxxx, David Hildenbrand <david@xxxxxxxxxx>, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, Paul Mackerras <paulus@xxxxxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxxxx>, Oscar Salvador <osalvador@xxxxxxx>, "Rafael J. Wysocki" <rafael@xxxxxxxxxx>, Baoquan He <bhe@xxxxxxxxxx>, Wei Yang <richard.weiyang@xxxxxxxxx>
Subject: [PATCH v2 4/8] powernv/memtrace: always online added memory blocks
Date: Tue, 17 Mar 2020 11:49:38 +0100
Let's always try to online the re-added memory blocks. In case add_memory()
already onlined the added memory blocks, the first device_online() call
will fail and stop processing the remaining memory blocks.
This avoids manually having to check memhp_auto_online.
Note: PPC always onlines all hotplugged memory directly from the kernel
as well - something that is handled by user space on other
architectures.
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Cc: "Rafael J. Wysocki" <rafael@xxxxxxxxxx>
Cc: Baoquan He <bhe@xxxxxxxxxx>
Cc: Wei Yang <richard.weiyang@xxxxxxxxx>
Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
---
arch/powerpc/platforms/powernv/memtrace.c | 14 ++++----------
1 file changed, 4 insertions(+), 10 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/memtrace.c b/arch/powerpc/platforms/powernv/memtrace.c
index d6d64f8718e6..13b369d2cc45 100644
--- a/arch/powerpc/platforms/powernv/memtrace.c
+++ b/arch/powerpc/platforms/powernv/memtrace.c
@@ -231,16 +231,10 @@ static int memtrace_online(void)
continue;
}
- /*
- * If kernel isn't compiled with the auto online option
- * we need to online the memory ourselves.
- */
- if (!memhp_auto_online) {
- lock_device_hotplug();
- walk_memory_blocks(ent->start, ent->size, NULL,
- online_mem_block);
- unlock_device_hotplug();
- }
+ lock_device_hotplug();
+ walk_memory_blocks(ent->start, ent->size, NULL,
+ online_mem_block);
+ unlock_device_hotplug();
/*
* Memory was added successfully so clean up references to it
--
2.24.1
Patches currently in -mm which might be from david@xxxxxxxxxx are
drivers-base-memoryc-cache-memory-blocks-in-xarray-to-accelerate-lookup-fix.patch
virtio-balloon-switch-back-to-oom-handler-for-virtio_balloon_f_deflate_on_oom.patch
drivers-base-memoryc-indicate-all-memory-blocks-as-removable.patch
drivers-base-memoryc-drop-section_count.patch
drivers-base-memoryc-drop-pages_correctly_probed.patch
mm-page_extc-drop-pfn_present-check-when-onlining.patch
mm-memory_hotplug-simplify-calculation-of-number-of-pages-in-__remove_pages.patch
mm-memory_hotplug-cleanup-__add_pages.patch
drivers-base-memory-rename-mmop_online_keep-to-mmop_online.patch
drivers-base-memory-map-mmop_offline-to-0.patch
drivers-base-memory-store-mapping-between-mmop_-and-string-in-an-array.patch
powernv-memtrace-always-online-added-memory-blocks.patch
hv_balloon-dont-check-for-memhp_auto_online-manually.patch
mm-memory_hotplug-unexport-memhp_auto_online.patch
mm-memory_hotplug-convert-memhp_auto_online-to-store-an-online_type.patch
mm-memory_hotplug-allow-to-specify-a-default-online_type.patch
