The patch titled
Subject: powerpc-powernv-hold-device_hotplug_lock-when-calling-memtrace_offline_pages-v3
has been added to the -mm tree. Its filename is
powerpc-powernv-hold-device_hotplug_lock-when-calling-memtrace_offline_pages-v3.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/powerpc-powernv-hold-device_hotplug_lock-when-calling-memtrace_offline_pages-v3.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/powerpc-powernv-hold-device_hotplug_lock-when-calling-memtrace_offline_pages-v3.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: David Hildenbrand <david@xxxxxxxxxx>
Subject: powerpc-powernv-hold-device_hotplug_lock-when-calling-memtrace_offline_pages-v3
- Take device_hotplug_lock outside of loop
- Add Ack
Link: http://lkml.kernel.org/r/20180927092554.13567-6-david@xxxxxxxxxx
Reviewed-by: Pavel Tatashin <pavel.tatashin@xxxxxxxxxxxxx>
Reviewed-by: Rashmica Gupta <rashmica.g@xxxxxxxxx>
Acked-by: Balbir Singh <bsingharora@xxxxxxxxx>
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Rashmica Gupta <rashmica.g@xxxxxxxxx>
Cc: Balbir Singh <bsingharora@xxxxxxxxx>
Cc: Michael Neuling <mikey@xxxxxxxxxxx>
Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: John Allen <jallen@xxxxxxxxxxxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Cc: Juergen Gross <jgross@xxxxxxxx>
Cc: Kate Stewart <kstewart@xxxxxxxxxxxxxxxxxxx>
Cc: "K. Y. Srinivasan" <kys@xxxxxxxxxxxxx>
Cc: Len Brown <lenb@xxxxxxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Cc: Mathieu Malaterre <malat@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Nathan Fontenot <nfont@xxxxxxxxxxxxxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Cc: Philippe Ombredanne <pombredanne@xxxxxxxx>
Cc: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
Cc: Stephen Hemminger <sthemmin@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: YASUAKI ISHIMATSU <yasu.isimatu@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/platforms/powernv/memtrace.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/powerpc/platforms/powernv/memtrace.c~powerpc-powernv-hold-device_hotplug_lock-when-calling-memtrace_offline_pages-v3
+++ a/arch/powerpc/platforms/powernv/memtrace.c
@@ -111,8 +111,8 @@ static u64 memtrace_alloc_node(u32 nid,
/* Trace memory needs to be aligned to the size */
end_pfn = round_down(end_pfn - nr_pages, nr_pages);
+ lock_device_hotplug();
for (base_pfn = end_pfn; base_pfn > start_pfn; base_pfn -= nr_pages) {
- lock_device_hotplug();
if (memtrace_offline_pages(nid, base_pfn, nr_pages) == true) {
/*
* Remove memory in memory block size chunks so that
@@ -127,8 +127,8 @@ static u64 memtrace_alloc_node(u32 nid,
unlock_device_hotplug();
return base_pfn << PAGE_SHIFT;
}
- unlock_device_hotplug();
}
+ unlock_device_hotplug();
return 0;
}
_
Patches currently in -mm which might be from david@xxxxxxxxxx are
mm-memory_hotplug-make-remove_memory-take-the-device_hotplug_lock.patch
mm-memory_hotplug-make-add_memory-take-the-device_hotplug_lock.patch
mm-memory_hotplug-fix-online-offline_pages-called-wo-mem_hotplug_lock.patch
powerpc-powernv-hold-device_hotplug_lock-when-calling-device_online.patch
powerpc-powernv-hold-device_hotplug_lock-when-calling-memtrace_offline_pages.patch
powerpc-powernv-hold-device_hotplug_lock-when-calling-memtrace_offline_pages-v3.patch
memory-hotplugtxt-add-some-details-about-locking-internals.patch
