Contact: Lee Schermerhorn <lee.schermerhorn@hp.com>
Description:
The node's huge page size control/query attributes.
- See Documentation/vm/hugetlbpage.rst
\ No newline at end of file
+ See Documentation/admin-guide/mm/hugetlbpage.rst
\ No newline at end of file
free_hugepages
surplus_hugepages
resv_hugepages
- See Documentation/vm/hugetlbpage.rst for details.
+ See Documentation/admin-guide/mm/hugetlbpage.rst for details.
are not reclaimable, he or she can filter them out using
``/proc/kpageflags``.
-See Documentation/vm/pagemap.rst for more information about
+See Documentation/admin-guide/mm/pagemap.rst for more information about
``/proc/pid/pagemap``, ``/proc/kpageflags``, and ``/proc/kpagecgroup``.
.. _impl_details:
Here we document in detail how to interact with various mechanisms in
the Linux memory management.
+
+.. toctree::
+ :maxdepth: 1
+
+ hugetlbpage
+ idle_page_tracking
+ pagemap
+ soft-dirty
+ userfaultfd
* Bits 0-54 page frame number (PFN) if present
* Bits 0-4 swap type if swapped
* Bits 5-54 swap offset if swapped
- * Bit 55 pte is soft-dirty (see Documentation/vm/soft-dirty.rst)
+ * Bit 55 pte is soft-dirty (see Documentation/admin-guide/mm/soft-dirty.rst)
* Bit 56 page exclusively mapped (since 4.2)
* Bits 57-60 zero
* Bit 61 page is file-page or shared-anon (since 3.5)
A compound page with order N consists of 2^N physically contiguous pages.
A compound page with order 2 takes the form of "HTTT", where H donates its
head page and T donates its tail page(s). The major consumers of compound
- pages are hugeTLB pages (Documentation/vm/hugetlbpage.rst), the SLUB etc.
+ pages are hugeTLB pages (Documentation/admin-guide/mm/hugetlbpage.rst), the SLUB etc.
memory allocators and various device drivers. However in this interface,
only huge/giga pages are made visible to end users.
16 - COMPOUND_TAIL
zero page for pfn_zero or huge_zero page
25 - IDLE
page has not been accessed since it was marked idle (see
- Documentation/vm/idle_page_tracking.rst). Note that this flag may be
+ Documentation/admin-guide/mm/idle_page_tracking.rst). Note that this flag may be
stale in case the page was accessed via a PTE. To make sure the flag
is up-to-date one has to read ``/sys/kernel/mm/page_idle/bitmap`` first.
The /proc/PID/clear_refs is used to reset the PG_Referenced and ACCESSED/YOUNG
bits on both physical and virtual pages associated with a process, and the
-soft-dirty bit on pte (see Documentation/vm/soft-dirty.rst for details).
+soft-dirty bit on pte (see Documentation/admin-guide/mm/soft-dirty.rst
+for details).
To clear the bits for all the pages associated with the process
> echo 1 > /proc/PID/clear_refs
The /proc/pid/pagemap gives the PFN, which can be used to find the pageflags
using /proc/kpageflags and number of times a page is mapped using
-/proc/kpagecount. For detailed explanation, see Documentation/vm/pagemap.rst.
+/proc/kpagecount. For detailed explanation, see
+Documentation/admin-guide/mm/pagemap.rst.
The /proc/pid/numa_maps is an extension based on maps, showing the memory
locality and binding policy, as well as the memory usage (in pages) of
Change the minimum size of the hugepage pool.
-See Documentation/vm/hugetlbpage.rst
+See Documentation/admin-guide/mm/hugetlbpage.rst
==============================================================
Change the maximum size of the hugepage pool. The maximum is
nr_hugepages + nr_overcommit_hugepages.
-See Documentation/vm/hugetlbpage.rst
+See Documentation/admin-guide/mm/hugetlbpage.rst
==============================================================
- Outline of highmem and common issues.
hmm.rst
- Documentation of heterogeneous memory management
-hugetlbpage.rst
- - a brief summary of hugetlbpage support in the Linux kernel.
hugetlbfs_reserv.rst
- A brief overview of hugetlbfs reservation design/implementation.
hwpoison.rst
- explains what hwpoison is
-idle_page_tracking.rst
- - description of the idle page tracking feature.
ksm.rst
- how to use the Kernel Samepage Merging feature.
mmu_notifier.rst
- description of page fragments allocator
page_migration.rst
- description of page migration in NUMA systems.
-pagemap.rst
- - pagemap, from the userspace perspective
page_owner.rst
- tracking about who allocated each page
remap_file_pages.rst
- a note about remap_file_pages() system call
slub.rst
- a short users guide for SLUB.
-soft-dirty.rst
- - short explanation for soft-dirty PTEs
split_page_table_lock.rst
- Separate per-table lock to improve scalability of the old page_table_lock.
swap_numa.rst
- Transparent Hugepage Support, alternative way of using hugepages.
unevictable-lru.rst
- Unevictable LRU infrastructure
-userfaultfd.rst
- - description of userfaultfd system call
z3fold.txt
- outline of z3fold allocator for storing compressed pages
zsmalloc.rst
value). This allows stress testing of many kinds of
pages. The page_flags are the same as in /proc/kpageflags. The
flag bits are defined in include/linux/kernel-page-flags.h and
- documented in Documentation/vm/pagemap.rst
+ documented in Documentation/admin-guide/mm/pagemap.rst
* Architecture specific MCE injector
.. toctree::
:maxdepth: 1
- hugetlbpage
- idle_page_tracking
ksm
numa_memory_policy
- pagemap
transhuge
- soft-dirty
swap_numa
- userfaultfd
zswap
Kernel developers MM documentation
help
hugetlbfs is a filesystem backing for HugeTLB pages, based on
ramfs. For architectures that support it, say Y here and read
- <file:Documentation/vm/hugetlbpage.rst> for details.
+ <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
If unsure, say N.
/*
* The soft-dirty tracker uses #PF-s to catch writes
* to pages, so write-protect the pte as well. See the
- * Documentation/vm/soft-dirty.rst for full description
+ * Documentation/admin-guide/mm/soft-dirty.rst for full description
* of how soft-dirty works.
*/
pte_t ptent = *pte;
* Bits 0-54 page frame number (PFN) if present
* Bits 0-4 swap type if swapped
* Bits 5-54 swap offset if swapped
- * Bit 55 pte is soft-dirty (see Documentation/vm/soft-dirty.rst)
+ * Bit 55 pte is soft-dirty (see Documentation/admin-guide/mm/soft-dirty.rst)
* Bit 56 page exclusively mapped
* Bits 57-60 zero
* Bit 61 page is file-page or shared-anon
into a page just as regular dirty bit, but unlike the latter
it can be cleared by hands.
- See Documentation/vm/soft-dirty.rst for more details.
+ See Documentation/admin-guide/mm/soft-dirty.rst for more details.
config ZSWAP
bool "Compressed cache for swap pages (EXPERIMENTAL)"
be useful to tune memory cgroup limits and/or for job placement
within a compute cluster.
- See Documentation/vm/idle_page_tracking.rst for more details.
+ See Documentation/admin-guide/mm/idle_page_tracking.rst for
+ more details.
# arch_add_memory() comprehends device memory
config ARCH_HAS_ZONE_DEVICE
projects / platform / kernel / linux-starfive.git / commitdiff