All of lore.kernel.org
 help / color / mirror / Atom feed
From: Oscar Salvador <osalvador@suse.de>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: David Hildenbrand <david@redhat.com>,
	Michal Hocko <mhocko@kernel.org>,
	Anshuman Khandual <anshuman.khandual@arm.com>,
	Pavel Tatashin <pasha.tatashin@soleen.com>,
	Vlastimil Babka <vbabka@suse.cz>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	Oscar Salvador <osalvador@suse.de>,
	Michal Hocko <mhocko@suse.com>
Subject: [PATCH v9 5/8] acpi,memhotplug: Enable MHP_MEMMAP_ON_MEMORY when supported
Date: Fri, 16 Apr 2021 13:24:08 +0200	[thread overview]
Message-ID: <20210416112411.9826-6-osalvador@suse.de> (raw)
In-Reply-To: <20210416112411.9826-1-osalvador@suse.de>

Let the caller check whether it can pass MHP_MEMMAP_ON_MEMORY by
checking mhp_supports_memmap_on_memory().
MHP_MEMMAP_ON_MEMORY can only be set in case
ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE is enabled, the architecture supports
altmap, and the range to be added spans a single memory block.

Signed-off-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.com>
---
 drivers/acpi/acpi_memhotplug.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index b02fd51e5589..8cc195c4c861 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -171,6 +171,7 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
 	acpi_handle handle = mem_device->device->handle;
 	int result, num_enabled = 0;
 	struct acpi_memory_info *info;
+	mhp_t mhp_flags = MHP_NONE;
 	int node;
 
 	node = acpi_get_node(handle);
@@ -194,8 +195,10 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
 		if (node < 0)
 			node = memory_add_physaddr_to_nid(info->start_addr);
 
+		if (mhp_supports_memmap_on_memory(info->length))
+			mhp_flags |= MHP_MEMMAP_ON_MEMORY;
 		result = __add_memory(node, info->start_addr, info->length,
-				      MHP_NONE);
+				      mhp_flags);
 
 		/*
 		 * If the memory block has been used by the kernel, add_memory()
-- 
2.16.3


  parent reply	other threads:[~2021-04-16 11:24 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-16 11:24 [PATCH v9 0/8] Allocate memmap from hotadded memory (per device) Oscar Salvador
2021-04-16 11:24 ` [PATCH v9 1/8] drivers/base/memory: Introduce memory_block_{online,offline} Oscar Salvador
2021-04-20  9:23   ` Michal Hocko
2021-04-16 11:24 ` [PATCH v9 2/8] mm,memory_hotplug: Relax fully spanned sections check Oscar Salvador
2021-04-20  9:40   ` Michal Hocko
2021-04-21  7:37     ` Oscar Salvador
2021-04-16 11:24 ` [PATCH v9 3/8] mm,memory_hotplug: Factor out adjusting present pages into adjust_present_page_count() Oscar Salvador
2021-04-20  9:45   ` Michal Hocko
2021-04-21  8:00     ` Oscar Salvador
2021-04-21  8:06       ` David Hildenbrand
2021-04-21  8:31       ` Michal Hocko
2021-04-21  8:35         ` Oscar Salvador
2021-04-16 11:24 ` [PATCH v9 4/8] mm,memory_hotplug: Allocate memmap from the added memory range Oscar Salvador
2021-04-20 10:56   ` Michal Hocko
2021-04-21  8:15     ` Oscar Salvador
2021-04-21  8:39       ` Michal Hocko
2021-04-21  8:44         ` David Hildenbrand
2021-04-21  8:49           ` Michal Hocko
2021-04-21  8:52             ` David Hildenbrand
2021-04-21  8:46         ` Oscar Salvador
2021-04-16 11:24 ` Oscar Salvador [this message]
2021-04-16 11:24 ` [PATCH v9 6/8] mm,memory_hotplug: Add kernel boot option to enable memmap_on_memory Oscar Salvador
2021-04-16 11:24 ` [PATCH v9 7/8] x86/Kconfig: Introduce ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE Oscar Salvador
2021-04-20 10:56   ` Michal Hocko
2021-04-16 11:24 ` [PATCH v9 8/8] arm64/Kconfig: " Oscar Salvador

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210416112411.9826-6-osalvador@suse.de \
    --to=osalvador@suse.de \
    --cc=akpm@linux-foundation.org \
    --cc=anshuman.khandual@arm.com \
    --cc=david@redhat.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=mhocko@kernel.org \
    --cc=mhocko@suse.com \
    --cc=pasha.tatashin@soleen.com \
    --cc=vbabka@suse.cz \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.