From: Dan Williams <dan.j.williams@intel.com>
To: akpm@linux-foundation.org
Cc: Joao Martins <joao.m.martins@oracle.com>,
vishal.l.verma@intel.com, dave.hansen@linux.intel.com,
linux-mm@kvack.org, linux-nvdimm@lists.01.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v5 16/17] dax/hmem: introduce dax_hmem.region_idle parameter
Date: Fri, 25 Sep 2020 12:13:10 -0700 [thread overview]
Message-ID: <160106119033.30709.11249962152222193448.stgit@dwillia2-desk3.amr.corp.intel.com> (raw)
In-Reply-To: <160106109960.30709.7379926726669669398.stgit@dwillia2-desk3.amr.corp.intel.com>
From: Joao Martins <joao.m.martins@oracle.com>
Introduce a new module parameter for dax_hmem which initializes all region
devices as free, rather than allocating a pagemap for the region by
default.
All hmem devices created with dax_hmem.region_idle=1 will have full
available size for creating dynamic dax devices.
Link: https://lkml.kernel.org/r/159643106460.4062302.5868522341307530091.stgit@dwillia2-desk3.amr.corp.intel.com
Link: https://lore.kernel.org/r/20200716172913.19658-4-joao.m.martins@oracle.com
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
drivers/dax/hmem/hmem.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/dax/hmem/hmem.c b/drivers/dax/hmem/hmem.c
index 1a3347bb6143..1bf040dbc834 100644
--- a/drivers/dax/hmem/hmem.c
+++ b/drivers/dax/hmem/hmem.c
@@ -5,6 +5,9 @@
#include <linux/pfn_t.h>
#include "../bus.h"
+static bool region_idle;
+module_param_named(region_idle, region_idle, bool, 0644);
+
static int dax_hmem_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -30,7 +33,7 @@ static int dax_hmem_probe(struct platform_device *pdev)
data = (struct dev_dax_data) {
.dax_region = dax_region,
.id = -1,
- .size = resource_size(res),
+ .size = region_idle ? 0 : resource_size(res),
};
dev_dax = devm_create_dev_dax(&data);
if (IS_ERR(dev_dax))
next prev parent reply other threads:[~2020-09-25 20:34 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-25 19:11 [PATCH v5 00/17] device-dax: support sub-dividing soft-reserved ranges Dan Williams
2020-09-25 19:11 ` [PATCH v5 01/17] device-dax: make pgmap optional for instance creation Dan Williams
2020-10-01 8:41 ` David Hildenbrand
2020-10-01 16:54 ` Dan Williams
2020-10-01 17:39 ` David Hildenbrand
2020-10-01 19:12 ` Dan Williams
2020-09-25 19:11 ` [PATCH v5 02/17] device-dax/kmem: introduce dax_kmem_range() Dan Williams
2020-09-30 16:14 ` David Hildenbrand
2020-09-25 19:11 ` [PATCH v5 03/17] device-dax/kmem: move resource name tracking to drvdata Dan Williams
2020-09-30 16:19 ` David Hildenbrand
2020-09-25 19:12 ` [PATCH v5 04/17] device-dax/kmem: replace release_resource() with release_mem_region() Dan Williams
2020-09-30 16:23 ` David Hildenbrand
2020-09-30 17:28 ` Dan Williams
2020-09-25 19:12 ` [PATCH v5 05/17] device-dax: add an allocation interface for device-dax instances Dan Williams
2020-09-25 19:12 ` [PATCH v5 06/17] device-dax: introduce 'struct dev_dax' typed-driver operations Dan Williams
2020-09-25 19:12 ` [PATCH v5 07/17] device-dax: introduce 'seed' devices Dan Williams
2020-09-25 19:12 ` [PATCH v5 08/17] drivers/base: make device_find_child_by_name() compatible with sysfs inputs Dan Williams
2020-09-25 19:12 ` [PATCH v5 09/17] device-dax: add resize support Dan Williams
2020-09-25 19:12 ` [PATCH v5 10/17] mm/memremap_pages: convert to 'struct range' Dan Williams
2020-09-28 19:12 ` boris.ostrovsky
2020-09-25 19:12 ` [PATCH v5 11/17] mm/memremap_pages: support multiple ranges per invocation Dan Williams
2020-09-25 19:12 ` [PATCH v5 12/17] device-dax: add dis-contiguous resource support Dan Williams
2020-09-25 19:12 ` [PATCH v5 13/17] device-dax: introduce 'mapping' devices Dan Williams
2020-09-25 19:12 ` [PATCH v5 14/17] device-dax: make align a per-device property Dan Williams
2020-09-25 19:13 ` Dan Williams [this message]
2020-09-25 19:13 ` [PATCH v5 17/17] device-dax: add a range mapping allocation attribute Dan Williams
2020-09-25 20:51 ` [PATCH v5 00/17] device-dax: support sub-dividing soft-reserved ranges Joao Martins
2020-09-25 21:01 ` Dan Williams
2020-09-25 21:05 ` Joao Martins
[not found] ` <160106118486.30709.13012322227204800596.stgit@dwillia2-desk3.amr.corp.intel.com>
2020-09-26 2:22 ` [PATCH v5 15/17] device-dax: add an 'align' attribute Andrew Morton
2020-09-26 3:31 ` Dan Williams
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