[PATCH v3-UPDATE 1/3] acpi: Add acpi_map_pxm_to_online_node()
by Toshi Kani
The kernel initializes CPU & memory's NUMA topology from ACPI
SRAT table. Some other ACPI tables, such as NFIT and DMAR, also
contain proximity IDs for their device's NUMA topology. This
information can be used to improve performance of these devices.
This patch introduces acpi_map_pxm_to_online_node(), which is
similar to acpi_map_pxm_to_node(), but always returns an online
node. When the mapped node from a given proximity ID is offline,
it looks up the node distance table and returns the nearest
online node.
ACPI device drivers, which are called after the NUMA initialization
has completed in the kernel, can call this interface to obtain their
device NUMA topology from ACPI tables. Such drivers do not have to
deal with offline nodes. A node may be offline when a device
proximity ID is unique, SRAT memory entry does not exist, or NUMA is
disabled, ex. "numa=off" on x86.
This patch also moves the pxm range check from acpi_get_node() to
acpi_map_pxm_to_node().
Signed-off-by: Toshi Kani <toshi.kani(a)hp.com>
---
UPDATE: Remove "-" from "on-line" and "off-line".
---
drivers/acpi/numa.c | 50 +++++++++++++++++++++++++++++++++++++++++++++++---
include/linux/acpi.h | 5 +++++
2 files changed, 52 insertions(+), 3 deletions(-)
diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c
index 1333cbdc..acaa3b4 100644
--- a/drivers/acpi/numa.c
+++ b/drivers/acpi/numa.c
@@ -29,6 +29,8 @@
#include <linux/errno.h>
#include <linux/acpi.h>
#include <linux/numa.h>
+#include <linux/nodemask.h>
+#include <linux/topology.h>
#define PREFIX "ACPI: "
@@ -70,7 +72,12 @@ static void __acpi_map_pxm_to_node(int pxm, int node)
int acpi_map_pxm_to_node(int pxm)
{
- int node = pxm_to_node_map[pxm];
+ int node;
+
+ if (pxm < 0 || pxm >= MAX_PXM_DOMAINS)
+ return NUMA_NO_NODE;
+
+ node = pxm_to_node_map[pxm];
if (node == NUMA_NO_NODE) {
if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
@@ -83,6 +90,45 @@ int acpi_map_pxm_to_node(int pxm)
return node;
}
+/**
+ * acpi_map_pxm_to_online_node - Map proximity ID to online node
+ * @pxm: ACPI proximity ID
+ *
+ * This is similar to acpi_map_pxm_to_node(), but always returns an online
+ * node. When the mapped node from a given proximity ID is offline, it
+ * looks up the node distance table and returns the nearest online node.
+ *
+ * ACPI device drivers, which are called after the NUMA initialization has
+ * completed in the kernel, can call this interface to obtain their device
+ * NUMA topology from ACPI tables. Such drivers do not have to deal with
+ * offline nodes. A node may be offline when a device proximity ID is
+ * unique, SRAT memory entry does not exist, or NUMA is disabled, ex.
+ * "numa=off" on x86.
+ */
+int acpi_map_pxm_to_online_node(int pxm)
+{
+ int node, n, dist, min_dist;
+
+ node = acpi_map_pxm_to_node(pxm);
+
+ if (node == NUMA_NO_NODE)
+ node = 0;
+
+ if (!node_online(node)) {
+ min_dist = INT_MAX;
+ for_each_online_node(n) {
+ dist = node_distance(node, n);
+ if (dist < min_dist) {
+ min_dist = dist;
+ node = n;
+ }
+ }
+ }
+
+ return node;
+}
+EXPORT_SYMBOL(acpi_map_pxm_to_online_node);
+
static void __init
acpi_table_print_srat_entry(struct acpi_subtable_header *header)
{
@@ -328,8 +374,6 @@ int acpi_get_node(acpi_handle handle)
int pxm;
pxm = acpi_get_pxm(handle);
- if (pxm < 0 || pxm >= MAX_PXM_DOMAINS)
- return NUMA_NO_NODE;
return acpi_map_pxm_to_node(pxm);
}
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index e4da5e3..1b3bbb1 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -289,8 +289,13 @@ extern void acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d);
extern void acpi_osi_setup(char *str);
#ifdef CONFIG_ACPI_NUMA
+int acpi_map_pxm_to_online_node(int pxm);
int acpi_get_node(acpi_handle handle);
#else
+static inline int acpi_map_pxm_to_online_node(int pxm)
+{
+ return 0;
+}
static inline int acpi_get_node(acpi_handle handle)
{
return 0;
5 years, 7 months
[-tip PATCH v4 0/6] pmem api, generic ioremap_cache, and memremap
by Dan Williams
The pmem api is responsible for shepherding data out to persistent
media. The pmem driver uses this api, when available, to assert that
data is durable by the time bio_endio() is invoked. When an
architecture or cpu can not make persistence guarantees the driver warns
and falls back to "best effort" implementation.
Changes since v3 [1]:
Rebased on tip/master now that Toshi's ioremap_wt() patches have landed
in -tip. The primary change was reflowing the patches against the newly
alphabetized 'select' options under config X86.
[1]: https://lists.01.org/pipermail/linux-nvdimm/2015-June/001081.html
---
Dan Williams (5):
arch: unify ioremap prototypes and macro aliases
cleanup IORESOURCE_CACHEABLE vs ioremap()
arch/*/asm/io.h: add ioremap_cache() to all architectures
devm: fix ioremap_cache() usage
arch: introduce memremap_cache() and memremap_wt()
Ross Zwisler (1):
arch, x86: pmem api for ensuring durability of persistent memory updates
arch/arc/include/asm/io.h | 1
arch/arm/Kconfig | 1
arch/arm/include/asm/io.h | 2 +
arch/arm/mach-clps711x/board-cdb89712.c | 2 -
arch/arm64/Kconfig | 1
arch/arm64/include/asm/io.h | 3 +
arch/arm64/kernel/efi.c | 4 +
arch/arm64/kernel/smp_spin_table.c | 10 ++-
arch/avr32/include/asm/io.h | 1
arch/cris/include/asm/io.h | 8 +-
arch/cris/mm/ioremap.c | 6 +-
arch/frv/Kconfig | 1
arch/frv/include/asm/io.h | 6 ++
arch/ia64/include/asm/io.h | 9 +--
arch/ia64/mm/ioremap.c | 4 +
arch/m32r/include/asm/io.h | 1
arch/m68k/Kconfig | 1
arch/m68k/include/asm/io_mm.h | 7 ++
arch/m68k/include/asm/io_no.h | 5 ++
arch/metag/Kconfig | 1
arch/metag/include/asm/io.h | 5 ++
arch/microblaze/include/asm/io.h | 1
arch/mips/Kconfig | 1
arch/mips/include/asm/io.h | 17 ++++-
arch/mn10300/include/asm/io.h | 1
arch/nios2/include/asm/io.h | 1
arch/powerpc/Kconfig | 1
arch/powerpc/include/asm/io.h | 2 -
arch/powerpc/kernel/pci_of_scan.c | 2 -
arch/s390/include/asm/io.h | 1
arch/sparc/include/asm/io_32.h | 1
arch/sparc/include/asm/io_64.h | 9 ++-
arch/sparc/kernel/pci.c | 3 -
arch/tile/include/asm/io.h | 1
arch/x86/Kconfig | 2 +
arch/x86/include/asm/cacheflush.h | 36 +++++++++++
arch/x86/include/asm/io.h | 7 ++
arch/x86/kernel/crash_dump_64.c | 6 +-
arch/x86/kernel/kdebugfs.c | 8 +-
arch/x86/kernel/ksysfs.c | 28 ++++-----
arch/x86/mm/ioremap.c | 10 +--
arch/xtensa/Kconfig | 1
arch/xtensa/include/asm/io.h | 3 +
drivers/acpi/apei/einj.c | 8 +-
drivers/acpi/apei/erst.c | 4 +
drivers/block/Kconfig | 1
drivers/block/pmem.c | 76 +++++++++++++++++++++--
drivers/firmware/google/memconsole.c | 4 +
drivers/pci/probe.c | 3 -
drivers/pnp/manager.c | 2 -
drivers/scsi/aic94xx/aic94xx_init.c | 7 --
drivers/scsi/arcmsr/arcmsr_hba.c | 5 --
drivers/scsi/mvsas/mv_init.c | 15 +----
drivers/video/fbdev/ocfb.c | 1
include/asm-generic/io.h | 8 ++
include/asm-generic/iomap.h | 4 +
include/linux/compiler.h | 2 +
include/linux/device.h | 5 ++
include/linux/io.h | 6 ++
include/linux/pmem.h | 102 +++++++++++++++++++++++++++++++
kernel/resource.c | 41 ++++++++++++
lib/Kconfig | 8 ++
lib/devres.c | 48 ++++++---------
lib/pci_iomap.c | 7 +-
64 files changed, 440 insertions(+), 138 deletions(-)
create mode 100644 include/linux/pmem.h
5 years, 7 months
[PATCH v2 0/3] Add NUMA support for NVDIMM devices
by Toshi Kani
Since NVDIMMs are installed on memory slots, they expose the NUMA
topology of a platform. This patchset adds support of sysfs
'numa_node' to I/O-related NVDIMM devices under /sys/bus/nd/devices.
This enables numactl(8) to accept 'block:' and 'file:' paths of
pmem and btt devices as shown in the examples below.
numactl --preferred block:pmem0 --show
numactl --preferred file:/dev/pmem0s --show
numactl can be used to bind an application to the locality of
a target NVDIMM for better performance. Here is a result of fio
benchmark to ext4/dax on an HP DL380 with 2 sockets for local and
remote settings.
Local [1] : 4098.3MB/s
Remote [2]: 3718.4MB/s
[1] numactl --preferred block:pmem0 --cpunodebind block:pmem0 fio <fs-on-pmem0>
[2] numactl --preferred block:pmem1 --cpunodebind block:pmem1 fio <fs-on-pmem0>
Patch 1/3 applies on top of the acpica branch of the pm tree.
Patch 2/3-3/3 apply on top of Dan Williams's v5 patch series of
"libnvdimm: non-volatile memory devices".
---
v2:
- Add acpi_map_pxm_to_online_node(), which returns an online node.
- Manage visibility of sysfs numa_node with is_visible. (Dan Williams)
- Check ACPI_NFIT_PROXIMITY_VALID in spa->flags.
---
Toshi Kani (3):
1/3 acpi: Add acpi_map_pxm_to_online_node()
2/3 libnvdimm: Set numa_node to NVDIMM devices
3/3 libnvdimm: Add sysfs numa_node to NVDIMM devices
---
drivers/acpi/nfit.c | 7 +++++++
drivers/acpi/numa.c | 40 +++++++++++++++++++++++++++++++++++++---
drivers/nvdimm/btt.c | 2 ++
drivers/nvdimm/btt_devs.c | 1 +
drivers/nvdimm/bus.c | 30 ++++++++++++++++++++++++++++++
drivers/nvdimm/namespace_devs.c | 1 +
drivers/nvdimm/nd.h | 1 +
drivers/nvdimm/region.c | 1 +
drivers/nvdimm/region_devs.c | 1 +
include/linux/acpi.h | 5 +++++
include/linux/libnvdimm.h | 2 ++
11 files changed, 88 insertions(+), 3 deletions(-)
5 years, 7 months
看看项目到底该怎么做
by 谈攒有
〇
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【培训时间】2015年7月09-10上海 7月23-24深圳
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掌握项目经理必备的4个工具（WBS，RAM，CPM图，甘特图）
课程结束总结：
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收集完成回家作业的基本方法
9:54:56
5 years, 7 months
[ndctl PATCH 0/6] nvdimm flags, read-only devices, and a fix for zeroing-labels
by Dan Williams
The bulk of this update is unit test extensions for verifying that
libnvdimm properly marks namespaces and btts as read-only depending on
the state of the "energy-source armed" flag in the NFIT. See patch14
[1] and patch15 [2] in the latest kernel updates.
The ndctl_dimm_zero_labels() library call was neglecting to flush the
cached copy of the labels being held by the kernel. That is now fixed.
Finally, some minor cleanups to the debug output to make it more
relevant/readable.
[1]: https://lists.01.org/pipermail/linux-nvdimm/2015-June/001260.html
[2]: https://lists.01.org/pipermail/linux-nvdimm/2015-June/001261.html
---
Dan Williams (6):
ndctl: quiet ndctl_cmd command debug
ndctl: trigger the kernel to re-read labels after zeroing
ndctl: add README.md
ndctl: nvdimm flags
ndctl: improve module binding debug
ndctl: update local ndctl.h
README.md | 43 ++++++++++
lib/libndctl.c | 193 +++++++++++++++++++++++++++++++++++++------
lib/libndctl.sym | 8 ++
lib/ndctl/libndctl.h | 8 ++
lib/test-libndctl.c | 225 ++++++++++++++++++++++++++++++++++++++++++--------
ndctl.h | 12 +--
6 files changed, 420 insertions(+), 69 deletions(-)
create mode 100644 README.md
5 years, 7 months
[PATCH v6 00/21] libnvdimm: non-volatile memory devices
by Dan Williams
A new sub-system in support of non-volatile memory storage devices. See
"[PATCH v6 21/21] libnvdimm: Non-Volatile Devices" for an overview.
Changes since v5 [1]:
1/ Add rationale/justification to the changelog for "[PATCH v6 20/21]
tools/testing/nvdimm: libnvdimm unit test infrastructure". Explain
why QEMU is not suitable. (Christoph)
2/ Expand the changelog of "[PATCH v6 18/21] nd_btt: atomic sector
updates" to give the reasoning behind architecture decisions related
to scaling. (Christoph)
3/ Introduce ->rw_bytes() to struct block_device_operations and kill off
the "ndio" implementation (save a couple hundred lines of glue code).
(Christoph)
4/ Kill usage of __iomem in the namespace label implementation in favor
of properly using byte-order helpers. (Christoph)
5/ Kill the include path munging in "[PATCH v6 20/21]
tools/testing/nvdimm: libnvdimm unit test infrastructure" this makes
the unit test implementation have near zero impact on the libnvdimm
code base. (Christoph)
6/ Miscellaneous 80 column fixups. (Christoph)
7/ Restore BLK_DEV and PHYS_ADDR_T_64BIT dependencies to LIBNVDIMM.
Diffstat since v5 [1]: "ebba6912e36e libnvdimm: Non-Volatile Devices"
[1]: https://lists.01.org/pipermail/linux-nvdimm/2015-June/001035.html
drivers/acpi/Makefile | 1 -
drivers/acpi/nfit.c | 228 +++++++++++++++++++++-----------------
drivers/acpi/nfit.h | 20 ++--
drivers/nvdimm/Kconfig | 6 +-
drivers/nvdimm/Makefile | 1 -
drivers/nvdimm/blk.c | 39 +++----
drivers/nvdimm/btt.c | 85 ++++++++-------
drivers/nvdimm/btt_devs.c | 163 +++++++++++++--------------
drivers/nvdimm/bus.c | 156 +++++++++++---------------
drivers/nvdimm/core.c | 72 ++----------
drivers/nvdimm/dimm.c | 4 +-
drivers/nvdimm/dimm_devs.c | 31 +++---
drivers/nvdimm/label.c | 284 ++++++++++++++++++++++++------------------------
drivers/nvdimm/label.h | 8 +-
drivers/nvdimm/namespace_devs.c | 142 ++++++++++++------------
drivers/nvdimm/nd-core.h | 28 +++--
drivers/nvdimm/nd.h | 113 ++-----------------
drivers/nvdimm/pmem.c | 38 +++----
drivers/nvdimm/region.c | 2 +-
drivers/nvdimm/region_devs.c | 90 +++++++--------
include/linux/blkdev.h | 44 ++++++++
include/linux/libnvdimm.h | 14 ++-
include/uapi/linux/ndctl.h | 8 +-
tools/testing/nvdimm/Kbuild | 2 -
tools/testing/nvdimm/test/nfit.c | 63 ++++++-----
tools/testing/nvdimm/test/nfit_test.h | 3 +-
26 files changed, 768 insertions(+), 877 deletions(-)
---
[PATCH v6 01/21] e820, efi: add ACPI 6.0 persistent memory types
[PATCH v6 02/21] libnvdimm, nfit: initial libnvdimm infrastructure and NFIT support
[PATCH v6 03/21] libnvdimm: control character device and nvdimm_bus sysfs attributes
[PATCH v6 04/21] libnvdimm, nfit: dimm/memory-devices
[PATCH v6 05/21] libnvdimm: control (ioctl) messages for nvdimm_bus and nvdimm devices
[PATCH v6 06/21] libnvdimm, nvdimm: dimm driver and base libnvdimm device-driver infrastructure
[PATCH v6 07/21] libnvdimm, nfit: regions (block-data-window, persistent memory, volatile memory)
[PATCH v6 08/21] libnvdimm: support for legacy (non-aliasing) nvdimms
[PATCH v6 09/21] libnvdimm, pmem: move pmem to drivers/nvdimm/
[PATCH v6 10/21] libnvdimm, pmem: add libnvdimm support to the pmem driver
[PATCH v6 11/21] libnvdimm, nfit: add interleave-set state-tracking infrastructure
[PATCH v6 12/21] libnvdimm: namespace indices: read and validate
[PATCH v6 13/21] libnvdimm: pmem label sets and namespace instantiation.
[PATCH v6 14/21] libnvdimm: blk labels and namespace instantiation
[PATCH v6 15/21] libnvdimm: write pmem label set
[PATCH v6 16/21] libnvdimm: write blk label set
[PATCH v6 17/21] libnvdimm: infrastructure for btt devices
[PATCH v6 18/21] nd_btt: atomic sector updates
[PATCH v6 19/21] libnvdimm, nfit, nd_blk: driver for BLK-mode access persistent memory
[PATCH v6 20/21] tools/testing/nvdimm: libnvdimm unit test infrastructure
[PATCH v6 21/21] libnvdimm: Non-Volatile Devices
Documentation/nvdimm/btt.txt | 273 +++++
Documentation/nvdimm/nvdimm.txt | 805 ++++++++++++++++
MAINTAINERS | 39 +
arch/arm64/kernel/efi.c | 1
arch/ia64/kernel/efi.c | 4
arch/x86/Kconfig | 3
arch/x86/boot/compressed/eboot.c | 4
arch/x86/include/uapi/asm/e820.h | 1
arch/x86/kernel/e820.c | 28 -
arch/x86/kernel/pmem.c | 92 +-
arch/x86/platform/efi/efi.c | 3
drivers/Kconfig | 2
drivers/Makefile | 1
drivers/acpi/Kconfig | 26 +
drivers/acpi/Makefile | 1
drivers/acpi/nfit.c | 1546 ++++++++++++++++++++++++++++++
drivers/acpi/nfit.h | 155 +++
drivers/block/Kconfig | 11
drivers/block/Makefile | 1
drivers/nvdimm/Kconfig | 75 +
drivers/nvdimm/Makefile | 20
drivers/nvdimm/blk.c | 241 +++++
drivers/nvdimm/btt.c | 1449 ++++++++++++++++++++++++++++
drivers/nvdimm/btt.h | 186 ++++
drivers/nvdimm/btt_devs.c | 432 ++++++++
drivers/nvdimm/bus.c | 746 ++++++++++++++
drivers/nvdimm/core.c | 416 ++++++++
drivers/nvdimm/dimm.c | 115 ++
drivers/nvdimm/dimm_devs.c | 517 ++++++++++
drivers/nvdimm/label.c | 926 ++++++++++++++++++
drivers/nvdimm/label.h | 141 +++
drivers/nvdimm/namespace_devs.c | 1698 +++++++++++++++++++++++++++++++++
drivers/nvdimm/nd-core.h | 111 ++
drivers/nvdimm/nd.h | 168 +++
drivers/nvdimm/pmem.c | 107 +-
drivers/nvdimm/region.c | 189 ++++
drivers/nvdimm/region_devs.c | 667 +++++++++++++
include/linux/blkdev.h | 44 +
include/linux/efi.h | 3
include/linux/libnvdimm.h | 139 +++
include/linux/nd.h | 98 ++
include/uapi/linux/Kbuild | 1
include/uapi/linux/ndctl.h | 199 ++++
tools/testing/nvdimm/Kbuild | 35 +
tools/testing/nvdimm/Makefile | 7
tools/testing/nvdimm/test/Kbuild | 8
tools/testing/nvdimm/test/iomap.c | 151 +++
tools/testing/nvdimm/test/nfit.c | 1112 ++++++++++++++++++++++
tools/testing/nvdimm/test/nfit_test.h | 29 +
49 files changed, 12934 insertions(+), 92 deletions(-)
create mode 100644 Documentation/nvdimm/btt.txt
create mode 100644 Documentation/nvdimm/nvdimm.txt
create mode 100644 drivers/acpi/nfit.c
create mode 100644 drivers/acpi/nfit.h
create mode 100644 drivers/nvdimm/Kconfig
create mode 100644 drivers/nvdimm/Makefile
create mode 100644 drivers/nvdimm/blk.c
create mode 100644 drivers/nvdimm/btt.c
create mode 100644 drivers/nvdimm/btt.h
create mode 100644 drivers/nvdimm/btt_devs.c
create mode 100644 drivers/nvdimm/bus.c
create mode 100644 drivers/nvdimm/core.c
create mode 100644 drivers/nvdimm/dimm.c
create mode 100644 drivers/nvdimm/dimm_devs.c
create mode 100644 drivers/nvdimm/label.c
create mode 100644 drivers/nvdimm/label.h
create mode 100644 drivers/nvdimm/namespace_devs.c
create mode 100644 drivers/nvdimm/nd-core.h
create mode 100644 drivers/nvdimm/nd.h
rename drivers/{block/pmem.c => nvdimm/pmem.c} (69%)
create mode 100644 drivers/nvdimm/region.c
create mode 100644 drivers/nvdimm/region_devs.c
create mode 100644 include/linux/libnvdimm.h
create mode 100644 include/linux/nd.h
create mode 100644 include/uapi/linux/ndctl.h
create mode 100644 tools/testing/nvdimm/Kbuild
create mode 100644 tools/testing/nvdimm/Makefile
create mode 100644 tools/testing/nvdimm/test/Kbuild
create mode 100644 tools/testing/nvdimm/test/iomap.c
create mode 100644 tools/testing/nvdimm/test/nfit.c
create mode 100644 tools/testing/nvdimm/test/nfit_test.h
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