On Thu, Jan 17, 2019 at 12:41:19PM +0100, Rafael J. Wysocki wrote:
> On Wed, Jan 16, 2019 at 6:59 PM Keith Busch wrote:
> >
> > Add entries for memory initiator and target node class attributes.
> >
> > Signed-off-by: Keith Busch
>
> I would recommend combi
On Thu, Jan 17, 2019 at 10:18:35AM -0800, Jonathan Cameron wrote:
> I've been having a play with various hand constructed HMAT tables to allow
> me to try breaking them in all sorts of ways.
>
> Mostly working as expected.
>
> Two places I am so far unsure on...
>
> 1. Concept of 'best' is not
On Thu, Jan 17, 2019 at 12:20:06PM -0500, Jeff Moyer wrote:
> Keith Busch writes:
> > On Thu, Jan 17, 2019 at 11:29:10AM -0500, Jeff Moyer wrote:
> >> Dave Hansen writes:
> >> > Persistent memory is cool. But, currently, you have to rewrite
> >> &
On Thu, Jan 17, 2019 at 11:29:10AM -0500, Jeff Moyer wrote:
> Dave Hansen writes:
> > Persistent memory is cool. But, currently, you have to rewrite
> > your applications to use it. Wouldn't it be cool if you could
> > just have it show up in your system like normal RAM and get to
> > it like a
On Thu, Jan 17, 2019 at 11:58:21PM +1100, Balbir Singh wrote:
> On Wed, Jan 16, 2019 at 10:57:51AM -0700, Keith Busch wrote:
> > It had previously been difficult to describe these setups as memory
> > rangers were generally lumped into the NUMA node of the CPUs. New
> > pla
re. When a subsystem makes use of this interface, initiators
of a lower class number, "Z", have better performance relative to higher
class numbers. When provided, class 0 is the highest performing access
class.
Signed-off-by: Keith Busch
---
drivers/base/Kconfig | 8 +
Add entries for memory initiator and target node class attributes.
Signed-off-by: Keith Busch
---
Documentation/ABI/stable/sysfs-devices-node | 25 -
1 file changed, 24 insertions(+), 1 deletion(-)
diff --git a/Documentation/ABI/stable/sysfs-devices-node
b
class0/target_nodelist
Y
# cat /sys/devices/system/node/nodeY/class0/initiator_nodelist
X
Signed-off-by: Keith Busch
---
drivers/base/node.c | 127 ++-
include/linux/node.h | 6 ++-
2 files changed, 131 insertions(+), 2 deletions(-)
diff
the attributes from such systems
that are useful for applications to know about, and readily usable with
existing tools and libraries.
Keith Busch (13):
acpi: Create subtable parsing infrastructure
acpi: Add HMAT to generic parsing tables
acpi/hmat: Parse and report heterogeneous memory
node
Add descriptions for memory class initiator performance access attributes.
Signed-off-by: Keith Busch
---
Documentation/ABI/stable/sysfs-devices-node | 28
1 file changed, 28 insertions(+)
diff --git a/Documentation/ABI/stable/sysfs-devices-node
b/Documentation
are the cache size, the line size, associativity,
and write back policy.
Signed-off-by: Keith Busch
---
drivers/base/node.c | 142 +++
include/linux/node.h | 39 ++
2 files changed, 181 insertions(+)
diff --git a/drivers/base/node.c b
parsing
the entries array may be more reused for all ACPI system tables and
the common code doesn't need to be duplicated.
Reviewed-by: Rafael J. Wysocki
Cc: Dan Williams
Signed-off-by: Keith Busch
---
arch/arm64/kernel/acpi_numa.c | 2 +-
arch/arm64/kernel/smp.c
to query this information.
Reviewed-by: Mike Rapoport
Signed-off-by: Keith Busch
---
Documentation/admin-guide/mm/numaperf.rst | 184 ++
1 file changed, 184 insertions(+)
create mode 100644 Documentation/admin-guide/mm/numaperf.rst
diff --git a/Documentation/admin-guide
The Heterogeneous Memory Attribute Table (HMAT) header has different
field lengths than the existing parsing uses. Add the HMAT type to the
parsing rules so it may be generically parsed.
Cc: Dan Williams
Reviewed-by: Rafael J. Wysocki
Signed-off-by: Keith Busch
---
drivers/acpi/tables.c | 9
Register memory side cache attributes with the memory's node if HMAT
provides the side cache iniformation table.
Signed-off-by: Keith Busch
---
drivers/acpi/hmat/hmat.c | 32
1 file changed, 32 insertions(+)
diff --git a/drivers/acpi/hmat/hmat.c b/drivers/acpi
Save the best performace access attributes and register these with the
memory's node if HMAT provides the locality table. While HMAT does make
it possible to know performance for all possible initiator-target
pairings, we export only the best pairings at this time.
Signed-off-by: Keith Busch
Add the attributes for the system memory side caches.
Signed-off-by: Keith Busch
---
Documentation/ABI/stable/sysfs-devices-node | 34 +
1 file changed, 34 insertions(+)
diff --git a/Documentation/ABI/stable/sysfs-devices-node
b/Documentation/ABI/stable/sysfs
Systems may provide different memory types and export this information
in the ACPI Heterogeneous Memory Attribute Table (HMAT). Parse these
tables provided by the platform and report the memory access and caching
attributes.
Signed-off-by: Keith Busch
---
drivers/acpi/Kconfig | 1
requires valid address ranges have an equivalent SRAT entry,
verify each memory target satisfies this requirement.
Signed-off-by: Keith Busch
---
drivers/acpi/hmat/hmat.c | 143 ---
1 file changed, 136 insertions(+), 7 deletions(-)
diff --git a/drivers
On Thu, Jan 10, 2019 at 07:42:46AM -0800, Rafael J. Wysocki wrote:
> On Wed, Jan 9, 2019 at 6:47 PM Keith Busch wrote:
> >
> > Systems may provide different memory types and export this information
> > in the ACPI Heterogeneous Memory Attribute Table (HMAT). Parse thes
[+linux-n...@lists.infradead.org]
On Mon, Jan 14, 2019 at 10:03:39AM -0700, Keith Busch wrote:
> [+Ming]
> On Mon, Jan 14, 2019 at 08:31:45AM -0600, Bjorn Helgaas wrote:
> > [+cc Dou, Jens, Thomas, Christoph, linux-pci, LKML]
> >
> > On Sun, Jan 13, 2019 at 11:24 PM fin
[+Ming]
On Mon, Jan 14, 2019 at 08:31:45AM -0600, Bjorn Helgaas wrote:
> [+cc Dou, Jens, Thomas, Christoph, linux-pci, LKML]
>
> On Sun, Jan 13, 2019 at 11:24 PM fin4478 fin4478 wrote:
> >
> > Hi,
> >
> > A regression from the 4.20 kernel: I have the Asgard 256GB nvme drive
> > and my custom
On Sun, Jan 13, 2019 at 01:42:30PM +0200, Mike Rapoport wrote:
> There are a couple of nitpicks below, otherwise
>
> Reviewed-by: Mike Rapoport
Thank you for the detailed review. I've incorporated all your
recommmendations for the next revision.
On Mon, Jan 14, 2019 at 12:10:12AM +0100, Pavel Machek wrote:
> On Wed 2019-01-09 10:43:36, Keith Busch wrote:
> > + This node's write latency in nanosecondss available to memory
> > + initiators in nodes found in this class's
> > initiators_nodelist.
>
On Fri, Jan 11, 2019 at 11:32:38AM +, Jonathan Cameron wrote:
> On Thu, 10 Jan 2019 10:30:17 -0700
> Keith Busch wrote:
> > I am not aware of a real platform that has an initiator-target pair with
> > better latency but worse bandwidth than any different initiator pair
On Thu, Jan 10, 2019 at 06:07:02PM +0530, Aneesh Kumar K.V wrote:
> Keith Busch writes:
>
> > Heterogeneous memory systems provide memory nodes with different latency
> > and bandwidth performance attributes. Provide a new kernel interface for
> > subsystems to regis
On Wed, Jan 09, 2019 at 05:54:59PM -0800, Yao HongBo wrote:
> On 1/10/2019 2:39 AM, Christoph Hellwig wrote:
> > On Mon, Jan 07, 2019 at 10:22:07AM +0800, Hongbo Yao wrote:
> >> There is an out of bounds array access in nvme_cqe_peding().
> >>
> >> When enable irq_thread for nvme interrupt, there
are the cache size, the line size, associativity,
and write back policy.
Signed-off-by: Keith Busch
---
drivers/base/node.c | 142 +++
include/linux/node.h | 39 ++
2 files changed, 181 insertions(+)
diff --git a/drivers/base/node.c b
Save the best performace access attributes and register these with the
memory's node if HMAT provides the locality table. While HMAT does make
it possible to know performance for all possible initiator-target
pairings, we export only the best pairings at this time.
Signed-off-by: Keith Busch
system/node/nodeX/class0/target_nodelist
Y
# cat /sys/devices/system/node/nodeY/class0/initiator_nodelist
X
Signed-off-by: Keith Busch
---
drivers/base/node.c | 127 ++-
include/linux/node.h | 6 ++-
2 files changed, 131 insertions(+), 2 del
re. When a subsystem makes use of this interface, initiators
of a lower class number, "Z", have better performance relative to higher
class numbers. When provided, class 0 is the highest performing access
class.
Signed-off-by: Keith Busch
---
drivers/base/Kconfig | 8 +
Add entries for memory initiator and target node class attributes.
Signed-off-by: Keith Busch
---
Documentation/ABI/stable/sysfs-devices-node | 25 -
1 file changed, 24 insertions(+), 1 deletion(-)
diff --git a/Documentation/ABI/stable/sysfs-devices-node
b
Register memory side cache attributes with the memory's node if HMAT
provides the side cache iniformation table.
Signed-off-by: Keith Busch
---
drivers/acpi/hmat.c | 32
1 file changed, 32 insertions(+)
diff --git a/drivers/acpi/hmat.c b/drivers/acpi/hmat.c
Add the attributes for the system memory side caches.
Signed-off-by: Keith Busch
---
Documentation/ABI/stable/sysfs-devices-node | 34 +
1 file changed, 34 insertions(+)
diff --git a/Documentation/ABI/stable/sysfs-devices-node
b/Documentation/ABI/stable/sysfs
requires valid address ranges have an equivalent SRAT entry,
verify each memory target satisfies this requirement.
Signed-off-by: Keith Busch
---
drivers/acpi/hmat.c | 143 +---
1 file changed, 136 insertions(+), 7 deletions(-)
diff --git a/drivers
parsing
the entries array may be more reused for all ACPI system tables and
the common code doesn't need to be duplicated.
Reviewed-by: Rafael J. Wysocki
Cc: Dan Williams
Signed-off-by: Keith Busch
---
arch/arm64/kernel/acpi_numa.c | 2 +-
arch/arm64/kernel/smp.c
Add descriptions for memory class initiator performance access attributes.
Signed-off-by: Keith Busch
---
Documentation/ABI/stable/sysfs-devices-node | 28
1 file changed, 28 insertions(+)
diff --git a/Documentation/ABI/stable/sysfs-devices-node
b/Documentation
est performing class, "class0".
Various changelog and documentation updates and clarifications.
Keith Busch (13):
acpi: Create subtable parsing infrastructure
acpi: Add HMAT to generic parsing tables
acpi/hmat: Parse and report heterogeneous memory
node: Link memory nodes to their com
The Heterogeneous Memory Attribute Table (HMAT) header has different
field lengths than the existing parsing uses. Add the HMAT type to the
parsing rules so it may be generically parsed.
Cc: Dan Williams
Signed-off-by: Keith Busch
---
drivers/acpi/tables.c | 9 +
include/linux/acpi.h
to query this information.
Signed-off-by: Keith Busch
---
Documentation/admin-guide/mm/numaperf.rst | 184 ++
1 file changed, 184 insertions(+)
create mode 100644 Documentation/admin-guide/mm/numaperf.rst
diff --git a/Documentation/admin-guide/mm/numaperf.rst
b
Systems may provide different memory types and export this information
in the ACPI Heterogeneous Memory Attribute Table (HMAT). Parse these
tables provided by the platform and report the memory access and caching
attributes.
Signed-off-by: Keith Busch
---
drivers/acpi/Kconfig | 8
gt;
> if (ctrl->cntlid != le16_to_cpu(id->cntlid))
>
> below will always be a no-op.
Yeah, this bug defeats the fabrics sanity check. Good catch.
Reviewed-by: Keith Busch
> diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
> index 2e65be8b1387..1ec87b30fa
On Tue, Dec 18, 2018 at 06:47:50PM +0100, h...@lst.de wrote:
> On Tue, Dec 18, 2018 at 10:26:46AM -0700, Keith Busch wrote:
> > No need for a space after the %s. __print_disk_name already appends a
> > space if there's a disk name, and we don't want the extra space if there
>
On Mon, Dec 17, 2018 at 08:51:38PM -0800, yupeng wrote:
> +TRACE_EVENT(nvme_sq,
> + TP_PROTO(void *rq_disk, int qid, int sq_head, int sq_tail),
> + TP_ARGS(rq_disk, qid, sq_head, sq_tail),
> + TP_STRUCT__entry(
> + __array(char, disk, DISK_NAME_LEN)
> +
On Wed, Dec 12, 2018 at 10:23:24AM +0530, Aneesh Kumar K.V wrote:
> On 12/11/18 6:33 AM, Keith Busch wrote:
> > +When multiple memory initiators exist, they may not all have the same
> > +performance when accessing a given memory target. The highest performing
> > +initia
ot; * @n: number of elements to be added".
>
> We want to insert only one element into kfifo, not "sizeof(entry) = 16".
> Without this patch, we would get 15 uninitialized elements.
>
> Signed-off-by: Yanjiang Jin
My bad. I had trouble testing the GHES path for this. Tha
On Tue, Dec 11, 2018 at 12:29:45PM -0800, Dan Williams wrote:
> On Tue, Dec 11, 2018 at 8:58 AM Keith Busch wrote:
> > +static int __init
> > +acpi_parse_cache(union acpi_subtable_headers *header, const unsigned long
> > end)
> > +{
> > + struct acpi_h
On Mon, Dec 10, 2018 at 10:03:40PM -0800, Dan Williams wrote:
> I have a use case to detect the presence of a memory-side-cache early
> at init time [1]. To me this means that hmat_init() needs to happen as
> a part of acpi_numa_init(). Subsequently I think that also means that
> the sysfs portion
NODE}/primary_cpu_nodelist) \
-- fio --filename=/dev/nvme0n1 --bs=4k --name=access-test
Signed-off-by: Keith Busch
---
drivers/base/node.c | 85
include/linux/node.h | 4 +++
2 files changed, 89 insertions(+)
diff --git a/drivers/base/node.c b
with subsys_initcall instead of device_init.
Combined the numa performance documentation into a single file and
moved it to admin-guide/mm/.
Changelogs updated with spelling/grammar/editorial fixes, and include
additional examples.
Keith Busch (12):
acpi: Create subtable parsing infrastructure
acpi
, associativity,
and write back policy.
Signed-off-by: Keith Busch
---
drivers/base/node.c | 140 +++
include/linux/node.h | 23 +
2 files changed, 163 insertions(+)
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 768612c06c56
Register memory side cache attributes with the memory's node if HMAT
provides the side cache information table.
Signed-off-by: Keith Busch
---
drivers/acpi/hmat.c | 32
1 file changed, 32 insertions(+)
diff --git a/drivers/acpi/hmat.c b/drivers/acpi/hmat.c
Add the entries for primary cpu and memory node attributes.
Signed-off-by: Keith Busch
---
Documentation/ABI/stable/sysfs-devices-node | 34 -
1 file changed, 33 insertions(+), 1 deletion(-)
diff --git a/Documentation/ABI/stable/sysfs-devices-node
b/Documentation
Systems may provide different memory types and export this information
in the ACPI Heterogeneous Memory Attribute Table (HMAT). Parse these
tables provided by the platform and report the memory access and caching
attributes.
Signed-off-by: Keith Busch
---
drivers/acpi/Kconfig | 8
dev/nvme0n1 --bs=4k --name=access-test
Signed-off-by: Keith Busch
---
drivers/base/Kconfig | 8
drivers/base/node.c | 44
include/linux/node.h | 22 ++
3 files changed, 74 insertions(+)
diff --git a/drivers/base/Kconfi
Save the best performance access attributes and register these with the
memory's node if HMAT provides the locality table.
Signed-off-by: Keith Busch
---
drivers/acpi/Kconfig | 1 +
drivers/acpi/hmat.c | 34 ++
2 files changed, 35 insertions(+)
diff --git
.
Since HMAT requires valid address ranges have an equivalent SRAT entry,
verify each memory target satisfies this requirement.
Signed-off-by: Keith Busch
---
drivers/acpi/hmat.c | 149 +---
1 file changed, 142 insertions(+), 7 deletions(-)
diff
to query this information.
Signed-off-by: Keith Busch
---
Documentation/admin-guide/mm/numaperf.rst | 171 ++
1 file changed, 171 insertions(+)
create mode 100644 Documentation/admin-guide/mm/numaperf.rst
diff --git a/Documentation/admin-guide/mm/numaperf.rst
b
Add the attributes for the system memory side caches.
Signed-off-by: Keith Busch
---
Documentation/ABI/stable/sysfs-devices-node | 34 +
1 file changed, 34 insertions(+)
diff --git a/Documentation/ABI/stable/sysfs-devices-node
b/Documentation/ABI/stable/sysfs
parsing
the entries array may be more reused for all ACPI system tables.
Signed-off-by: Keith Busch
---
arch/x86/kernel/acpi/boot.c | 36
drivers/acpi/numa.c | 16 +--
drivers/acpi/scan.c | 4 +--
drivers/acpi/tables.c| 67
Add descriptions for primary memory initiator performance access
attributes.
Signed-off-by: Keith Busch
---
Documentation/ABI/stable/sysfs-devices-node | 28
1 file changed, 28 insertions(+)
diff --git a/Documentation/ABI/stable/sysfs-devices-node
b/Documentation
On Fri, Dec 07, 2018 at 12:05:37PM -0800, Sagi Grimberg wrote:
>
> > Could you please take a look at this bug and code review?
> >
> > We are seeing more instances of this bug and found that reconnect_work
> > could hang as well, as can be seen from below stacktrace.
> >
> > Workqueue:
On Fri, Dec 07, 2018 at 12:05:37PM -0800, Sagi Grimberg wrote:
>
> > Could you please take a look at this bug and code review?
> >
> > We are seeing more instances of this bug and found that reconnect_work
> > could hang as well, as can be seen from below stacktrace.
> >
> > Workqueue:
On Tue, Dec 04, 2018 at 09:13:33PM +0530, Aneesh Kumar K.V wrote:
> Keith Busch writes:
> >
> > Indeed, that particular example is out of scope for this series. The
> > first objective is to aid a process running in node B's CPUs to allocate
> > memory in B1
On Tue, Dec 04, 2018 at 09:13:33PM +0530, Aneesh Kumar K.V wrote:
> Keith Busch writes:
> >
> > Indeed, that particular example is out of scope for this series. The
> > first objective is to aid a process running in node B's CPUs to allocate
> > memory in B1
On Mon, Nov 26, 2018 at 11:00:09PM -0800, Dan Williams wrote:
> On Wed, Nov 14, 2018 at 2:53 PM Keith Busch wrote:
> >
> > Heterogeneous memory systems provide memory nodes with latency
> > and bandwidth performance attributes that are different from other
> >
On Mon, Nov 26, 2018 at 11:00:09PM -0800, Dan Williams wrote:
> On Wed, Nov 14, 2018 at 2:53 PM Keith Busch wrote:
> >
> > Heterogeneous memory systems provide memory nodes with latency
> > and bandwidth performance attributes that are different from other
> >
On Mon, Nov 26, 2018 at 11:06:19AM -0800, Greg Kroah-Hartman wrote:
> On Wed, Nov 14, 2018 at 03:49:17PM -0700, Keith Busch wrote:
> > System memory may have side caches to help improve access speed. While
> > the system provided cache is transparent to the software accessing
&
On Mon, Nov 26, 2018 at 11:06:19AM -0800, Greg Kroah-Hartman wrote:
> On Wed, Nov 14, 2018 at 03:49:17PM -0700, Keith Busch wrote:
> > System memory may have side caches to help improve access speed. While
> > the system provided cache is transparent to the software accessing
&
On Thu, Nov 22, 2018 at 06:59:21PM +0530, Anshuman Khandual wrote:
>
>
> On 11/20/2018 04:36 AM, Keith Busch wrote:
> > On Mon, Nov 19, 2018 at 09:44:00AM +0530, Anshuman Khandual wrote:
> >> On 11/15/2018 04:19 AM, Keith Busch wrote:
> >>> System memory
On Thu, Nov 22, 2018 at 06:59:21PM +0530, Anshuman Khandual wrote:
>
>
> On 11/20/2018 04:36 AM, Keith Busch wrote:
> > On Mon, Nov 19, 2018 at 09:44:00AM +0530, Anshuman Khandual wrote:
> >> On 11/15/2018 04:19 AM, Keith Busch wrote:
> >>> System memory
On Tue, Nov 20, 2018 at 02:51:50PM +0100, Mike Rapoport wrote:
> On Wed, Nov 14, 2018 at 03:49:16PM -0700, Keith Busch wrote:
> > Platforms may provide system memory where some physical address ranges
> > perform differently than others. These heterogeneous memory attributes
On Tue, Nov 20, 2018 at 02:51:50PM +0100, Mike Rapoport wrote:
> On Wed, Nov 14, 2018 at 03:49:16PM -0700, Keith Busch wrote:
> > Platforms may provide system memory where some physical address ranges
> > perform differently than others. These heterogeneous memory attributes
On Mon, Nov 19, 2018 at 09:44:00AM +0530, Anshuman Khandual wrote:
> On 11/15/2018 04:19 AM, Keith Busch wrote:
> > System memory may have side caches to help improve access speed. While
> > the system provided cache is transparent to the software accessing
> > these memory
On Mon, Nov 19, 2018 at 09:44:00AM +0530, Anshuman Khandual wrote:
> On 11/15/2018 04:19 AM, Keith Busch wrote:
> > System memory may have side caches to help improve access speed. While
> > the system provided cache is transparent to the software accessing
> > these memory
On Mon, Nov 19, 2018 at 10:58:12AM +0100, Rafael J. Wysocki wrote:
> > +static unsigned long __init
> > +acpi_get_entry_length(struct acpi_subtable_entry *entry)
> > +{
> > + switch (entry->type) {
> > + case ACPI_SUBTABLE_COMMON:
> > + return entry->hdr->common.length;
>
On Mon, Nov 19, 2018 at 10:58:12AM +0100, Rafael J. Wysocki wrote:
> > +static unsigned long __init
> > +acpi_get_entry_length(struct acpi_subtable_entry *entry)
> > +{
> > + switch (entry->type) {
> > + case ACPI_SUBTABLE_COMMON:
> > + return entry->hdr->common.length;
>
On Mon, Nov 19, 2018 at 11:53:05AM -0500, Tyler Baicar wrote:
> On Thu, Nov 15, 2018 at 8:49 PM Sinan Kaya wrote:
> >
> > On 11/15/2018 3:16 PM, Alexandru Gagniuc wrote:
> > > I've asked around a few people at Dell and they unanimously agree that
> > > _OSC is the correct way to determine
On Mon, Nov 19, 2018 at 11:53:05AM -0500, Tyler Baicar wrote:
> On Thu, Nov 15, 2018 at 8:49 PM Sinan Kaya wrote:
> >
> > On 11/15/2018 3:16 PM, Alexandru Gagniuc wrote:
> > > I've asked around a few people at Dell and they unanimously agree that
> > > _OSC is the correct way to determine
On Wed, Nov 07, 2018 at 03:25:05PM +0800, Shunyong Yang wrote:
> The HXT SD4800 PCI controller does not set the Command Completed
> bit unless writes to the Slot Command register change "Control"
> bits.
>
> This patch adds SD4800 to the quirk.
>
> Cc: Joey Zheng
> Signed-off-by: Shunyong Yang
On Wed, Nov 07, 2018 at 03:25:05PM +0800, Shunyong Yang wrote:
> The HXT SD4800 PCI controller does not set the Command Completed
> bit unless writes to the Slot Command register change "Control"
> bits.
>
> This patch adds SD4800 to the quirk.
>
> Cc: Joey Zheng
> Signed-off-by: Shunyong Yang
On Mon, Nov 19, 2018 at 08:45:25AM +0530, Anshuman Khandual wrote:
> On 11/17/2018 12:02 AM, Keith Busch wrote:
> > On Thu, Nov 15, 2018 at 12:36:54PM -0800, Matthew Wilcox wrote:
> >> So ... let's imagine a hypothetical system (I've never seen one built like
> >> th
On Mon, Nov 19, 2018 at 08:45:25AM +0530, Anshuman Khandual wrote:
> On 11/17/2018 12:02 AM, Keith Busch wrote:
> > On Thu, Nov 15, 2018 at 12:36:54PM -0800, Matthew Wilcox wrote:
> >> So ... let's imagine a hypothetical system (I've never seen one built like
> >> th
On Mon, Nov 19, 2018 at 09:05:07AM +0530, Anshuman Khandual wrote:
> On 11/15/2018 04:19 AM, Keith Busch wrote:
> > Heterogeneous memory systems provide memory nodes with latency
> > and bandwidth performance attributes that are different from other
> > nodes. Create an int
On Mon, Nov 19, 2018 at 09:05:07AM +0530, Anshuman Khandual wrote:
> On 11/15/2018 04:19 AM, Keith Busch wrote:
> > Heterogeneous memory systems provide memory nodes with latency
> > and bandwidth performance attributes that are different from other
> > nodes. Create an int
On Fri, Nov 16, 2018 at 04:37:55PM -0600, Timur Tabi wrote:
> Is there a way to enable ftrace tracing only for one specific function
> and all the functions it calls? Then when the function returns,
> disable tracing until the next time?
>
> When I pass the function name only to
On Fri, Nov 16, 2018 at 04:37:55PM -0600, Timur Tabi wrote:
> Is there a way to enable ftrace tracing only for one specific function
> and all the functions it calls? Then when the function returns,
> disable tracing until the next time?
>
> When I pass the function name only to
On Thu, Nov 15, 2018 at 12:36:54PM -0800, Matthew Wilcox wrote:
> On Thu, Nov 15, 2018 at 07:59:20AM -0700, Keith Busch wrote:
> > On Thu, Nov 15, 2018 at 05:57:10AM -0800, Matthew Wilcox wrote:
> > > On Wed, Nov 14, 2018 at 03:49:14PM -0700, Keith Busch wrote:
> > > >
On Thu, Nov 15, 2018 at 12:36:54PM -0800, Matthew Wilcox wrote:
> On Thu, Nov 15, 2018 at 07:59:20AM -0700, Keith Busch wrote:
> > On Thu, Nov 15, 2018 at 05:57:10AM -0800, Matthew Wilcox wrote:
> > > On Wed, Nov 14, 2018 at 03:49:14PM -0700, Keith Busch wrote:
> > > >
On Fri, Nov 16, 2018 at 11:57:58AM +0530, Anshuman Khandual wrote:
> On 11/15/2018 04:19 AM, Keith Busch wrote:
> > This series provides a new sysfs representation for heterogeneous
> > system memory.
> >
> > The previous series that was specific to HMAT that this serie
On Fri, Nov 16, 2018 at 11:57:58AM +0530, Anshuman Khandual wrote:
> On 11/15/2018 04:19 AM, Keith Busch wrote:
> > This series provides a new sysfs representation for heterogeneous
> > system memory.
> >
> > The previous series that was specific to HMAT that this serie
On Thu, Nov 15, 2018 at 05:57:10AM -0800, Matthew Wilcox wrote:
> On Wed, Nov 14, 2018 at 03:49:14PM -0700, Keith Busch wrote:
> > Memory-only nodes will often have affinity to a compute node, and
> > platforms have ways to express that locality relationship.
> >
>
On Thu, Nov 15, 2018 at 05:57:10AM -0800, Matthew Wilcox wrote:
> On Wed, Nov 14, 2018 at 03:49:14PM -0700, Keith Busch wrote:
> > Memory-only nodes will often have affinity to a compute node, and
> > platforms have ways to express that locality relationship.
> >
>
/nodeY/initiator_access
/sys/devices/system/node/nodeY/initiator_access
|-- read_bandwidth
|-- read_latency
|-- write_bandwidth
`-- write_latency
The bandwidth is exported as MB/s and latency is reported in nanoseconds.
Signed-off-by: Keith Busch
---
drivers/base/Kconfig | 8
with the memory numa
nodes so they can be observed through sysfs.
Signed-off-by: Keith Busch
---
drivers/acpi/Kconfig | 9 ++
drivers/acpi/Makefile | 1 +
drivers/acpi/hmat.c | 384 ++
drivers/acpi/tables.c | 10 ++
4 files changed, 404 insertions
.
Signed-off-by: Keith Busch
---
drivers/base/node.c | 117 +++
include/linux/node.h | 23 ++
2 files changed, 140 insertions(+)
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 232535761998..bb94f1d18115 100644
--- a/drivers/base
Y' local to commpute node 'X':
# ls -l /sys/devices/system/node/nodeX/initiator*
/sys/devices/system/node/nodeX/targetY -> ../nodeY
# ls -l /sys/devices/system/node/nodeY/target*
/sys/devices/system/node/nodeY/initiatorX -> ../nodeX
Signed-off-by: Keith Busch
---
/nodeY/initiator_access
/sys/devices/system/node/nodeY/initiator_access
|-- read_bandwidth
|-- read_latency
|-- write_bandwidth
`-- write_latency
The bandwidth is exported as MB/s and latency is reported in nanoseconds.
Signed-off-by: Keith Busch
---
drivers/base/Kconfig | 8
with the memory numa
nodes so they can be observed through sysfs.
Signed-off-by: Keith Busch
---
drivers/acpi/Kconfig | 9 ++
drivers/acpi/Makefile | 1 +
drivers/acpi/hmat.c | 384 ++
drivers/acpi/tables.c | 10 ++
4 files changed, 404 insertions
.
Signed-off-by: Keith Busch
---
drivers/base/node.c | 117 +++
include/linux/node.h | 23 ++
2 files changed, 140 insertions(+)
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 232535761998..bb94f1d18115 100644
--- a/drivers/base
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