From: Dave Hansen <dave.hansen@linux.intel.com>
To: linux-kernel@vger.kernel.org
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
dan.j.williams@intel.com, dave.jiang@intel.com,
zwisler@kernel.org, vishal.l.verma@intel.com,
thomas.lendacky@amd.com, akpm@linux-foundation.org,
mhocko@suse.com, linux-nvdimm@lists.01.org, linux-mm@kvack.org,
ying.huang@intel.com, fengguang.wu@intel.com
Subject: [PATCH 3/9] dax: add more kmem device infrastructure
Date: Mon, 22 Oct 2018 13:13:22 -0700 [thread overview]
Message-ID: <20181022201322.6C8A7B2A@viggo.jf.intel.com> (raw)
In-Reply-To: <20181022201317.8558C1D8@viggo.jf.intel.com>
The previous patch is a simple copy of the pmem driver. This
makes it easy while this is in development to keep the pmem
and kmem code in sync.
This actually adds some necessary infrastructure for the new
driver to compile.
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Ross Zwisler <zwisler@kernel.org>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: linux-nvdimm@lists.01.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org
Cc: Huang Ying <ying.huang@intel.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
---
b/drivers/dax/kmem.c | 10 +++++-----
b/include/uapi/linux/ndctl.h | 2 ++
2 files changed, 7 insertions(+), 5 deletions(-)
diff -puN drivers/dax/kmem.c~dax-kmem-try-again-2018-2-header drivers/dax/kmem.c
--- a/drivers/dax/kmem.c~dax-kmem-try-again-2018-2-header 2018-10-22 13:12:22.000930392 -0700
+++ b/drivers/dax/kmem.c 2018-10-22 13:12:22.005930392 -0700
@@ -27,7 +27,7 @@ static struct dax_kmem *to_dax_kmem(stru
static void dax_kmem_percpu_release(struct percpu_ref *ref)
{
- struct dax_kmem *dax_kmem = to_dax_pmem(ref);
+ struct dax_kmem *dax_kmem = to_dax_kmem(ref);
dev_dbg(dax_kmem->dev, "trace\n");
complete(&dax_kmem->cmp);
@@ -36,7 +36,7 @@ static void dax_kmem_percpu_release(stru
static void dax_kmem_percpu_exit(void *data)
{
struct percpu_ref *ref = data;
- struct dax_kmem *dax_kmem = to_dax_pmem(ref);
+ struct dax_kmem *dax_kmem = to_dax_kmem(ref);
dev_dbg(dax_kmem->dev, "trace\n");
wait_for_completion(&dax_kmem->cmp);
@@ -46,7 +46,7 @@ static void dax_kmem_percpu_exit(void *d
static void dax_kmem_percpu_kill(void *data)
{
struct percpu_ref *ref = data;
- struct dax_kmem *dax_kmem = to_dax_pmem(ref);
+ struct dax_kmem *dax_kmem = to_dax_kmem(ref);
dev_dbg(dax_kmem->dev, "trace\n");
percpu_ref_kill(ref);
@@ -142,11 +142,11 @@ static struct nd_device_driver dax_kmem_
.drv = {
.name = "dax_kmem",
},
- .type = ND_DRIVER_DAX_PMEM,
+ .type = ND_DRIVER_DAX_KMEM,
};
module_nd_driver(dax_kmem_driver);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Intel Corporation");
-MODULE_ALIAS_ND_DEVICE(ND_DEVICE_DAX_PMEM);
+MODULE_ALIAS_ND_DEVICE(ND_DEVICE_DAX_KMEM);
diff -puN include/uapi/linux/ndctl.h~dax-kmem-try-again-2018-2-header include/uapi/linux/ndctl.h
--- a/include/uapi/linux/ndctl.h~dax-kmem-try-again-2018-2-header 2018-10-22 13:12:22.002930392 -0700
+++ b/include/uapi/linux/ndctl.h 2018-10-22 13:12:22.005930392 -0700
@@ -197,6 +197,7 @@ static inline const char *nvdimm_cmd_nam
#define ND_DEVICE_NAMESPACE_PMEM 5 /* PMEM namespace (may alias with BLK) */
#define ND_DEVICE_NAMESPACE_BLK 6 /* BLK namespace (may alias with PMEM) */
#define ND_DEVICE_DAX_PMEM 7 /* Device DAX interface to pmem */
+#define ND_DEVICE_DAX_KMEM 8 /* Normal kernel-managed system memory */
enum nd_driver_flags {
ND_DRIVER_DIMM = 1 << ND_DEVICE_DIMM,
@@ -206,6 +207,7 @@ enum nd_driver_flags {
ND_DRIVER_NAMESPACE_PMEM = 1 << ND_DEVICE_NAMESPACE_PMEM,
ND_DRIVER_NAMESPACE_BLK = 1 << ND_DEVICE_NAMESPACE_BLK,
ND_DRIVER_DAX_PMEM = 1 << ND_DEVICE_DAX_PMEM,
+ ND_DRIVER_DAX_KMEM = 1 << ND_DEVICE_DAX_KMEM,
};
enum {
_
next prev parent reply other threads:[~2018-10-22 20:18 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-22 20:13 [PATCH 0/9] Allow persistent memory to be used like normal RAM Dave Hansen
2018-10-22 20:13 ` [PATCH 1/9] mm/resource: return real error codes from walk failures Dave Hansen
2018-10-22 20:13 ` [PATCH 2/9] dax: kernel memory driver for mm ownership of DAX Dave Hansen
2018-10-23 1:56 ` Randy Dunlap
2018-10-22 20:13 ` Dave Hansen [this message]
2018-10-22 20:13 ` [PATCH 4/9] dax/kmem: allow PMEM devices to bind to KMEM driver Dave Hansen
2018-10-22 20:13 ` [PATCH 5/9] dax/kmem: add more nd dax kmem infrastructure Dave Hansen
2018-10-22 20:13 ` [PATCH 6/9] mm/memory-hotplug: allow memory resources to be children Dave Hansen
2018-10-22 20:13 ` [PATCH 7/9] dax/kmem: actually perform memory hotplug Dave Hansen
2018-10-22 20:13 ` [PATCH 8/9] dax/kmem: let walk_system_ram_range() search child resources Dave Hansen
2018-10-22 20:13 ` [PATCH 9/9] dax/kmem: actually enable the code in Makefile Dave Hansen
2018-10-23 1:05 ` [PATCH 0/9] Allow persistent memory to be used like normal RAM Dan Williams
2018-10-23 1:11 ` Dan Williams
2018-10-26 8:03 ` Xishi Qiu
2018-10-26 13:58 ` Dave Hansen
2018-10-27 4:45 ` Dan Williams
2018-10-23 18:12 ` Elliott, Robert (Persistent Memory)
2018-10-23 18:16 ` Dave Hansen
2018-10-23 18:58 ` Dan Williams
2018-10-26 5:42 ` Xishi Qiu
2018-10-26 9:03 ` Fengguang Wu
2018-10-27 11:00 ` Fengguang Wu
2018-10-31 5:11 ` Yang Shi
2018-12-03 9:22 ` Brice Goglin
2018-12-03 16:56 ` Dave Hansen
2018-12-03 17:16 ` Dan Williams
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