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Add /sys/devices/virtual/memory_tiering/ where all memory tier related details can be found. All allocated memory tiers will be listed there as /sys/devices/virtual/memory_tiering/memory_tierN/ The nodes which are part of a specific memory tier can be listed via /sys/devices/virtual/memory_tiering/memory_tierN/nodes A directory hierarchy looks like :/sys/devices/virtual/memory_tiering$ tree memory_tier4/ memory_tier4/ ├── nodes ├── subsystem -> ../../../../bus/memory_tiering └── uevent :/sys/devices/virtual/memory_tiering$ cat memory_tier4/nodes 0,2 [aneesh.kumar@linux.ibm.com: drop toptier_nodes from sysfs] Link: https://lkml.kernel.org/r/20220922102201.62168-1-aneesh.kumar@linux.ibm.com Link: https://lkml.kernel.org/r/20220830081736.119281-1-aneesh.kumar@linux.ibm.com Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Cc: Alistair Popple <apopple@nvidia.com> Cc: Bharata B Rao <bharata@amd.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Hesham Almatary <hesham.almatary@huawei.com> Cc: "Huang, Ying" <ying.huang@intel.com> Cc: Jagdish Gediya <jvgediya.oss@gmail.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Tim Chen <tim.c.chen@intel.com> Cc: Wei Xu <weixugc@google.com> Cc: Yang Shi <shy828301@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Plaintext
26 lines
905 B
Plaintext
What: /sys/devices/virtual/memory_tiering/
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Date: August 2022
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Contact: Linux memory management mailing list <linux-mm@kvack.org>
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Description: A collection of all the memory tiers allocated.
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Individual memory tier details are contained in subdirectories
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named by the abstract distance of the memory tier.
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/sys/devices/virtual/memory_tiering/memory_tierN/
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What: /sys/devices/virtual/memory_tiering/memory_tierN/
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/sys/devices/virtual/memory_tiering/memory_tierN/nodes
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Date: August 2022
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Contact: Linux memory management mailing list <linux-mm@kvack.org>
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Description: Directory with details of a specific memory tier
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This is the directory containing information about a particular
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memory tier, memtierN, where N is derived based on abstract distance.
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A smaller value of N implies a higher (faster) memory tier in the
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hierarchy.
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nodes: NUMA nodes that are part of this memory tier.
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