docs/vm: pagemap: formatting and spelling updates (86207d9a) · Commits · e / devices / android_kernel_oneplus_sm7250

Documentation/vm/pagemap.rst

+8 −8

Original line number	Diff line number	Diff line
		@@ -13,7 +13,7 @@ There are four components to pagemap:
		* ``/proc/pid/pagemap``. This file lets a userspace process find out which
		physical frame each virtual page is mapped to. It contains one 64-bit
		value for each virtual page, containing the following data (from
		fs/proc/task_mmu.c, above pagemap_read):
		``fs/proc/task_mmu.c``, above pagemap_read):

		* Bits 0-54 page frame number (PFN) if present
		* Bits 0-4 swap type if swapped
		@@ -36,7 +36,7 @@ There are four components to pagemap:
		precisely which pages are mapped (or in swap) and comparing mapped
		pages between processes.

		Efficient users of this interface will use /proc/pid/maps to
		Efficient users of this interface will use ``/proc/pid/maps`` to
		determine which areas of memory are actually mapped and llseek to
		skip over unmapped regions.

		@@ -79,11 +79,11 @@ There are four components to pagemap:
		memory cgroup each page is charged to, indexed by PFN. Only available when
		CONFIG_MEMCG is set.

		Short descriptions to the page flags:
		=====================================
		Short descriptions to the page flags
		====================================

		0 - LOCKED
		page is being locked for exclusive access, eg. by undergoing read/write IO
		page is being locked for exclusive access, e.g. by undergoing read/write IO
		7 - SLAB
		page is managed by the SLAB/SLOB/SLUB/SLQB kernel memory allocator
		When compound page is used, SLUB/SLQB will only set this flag on the head
		@@ -132,7 +132,7 @@ IO related page flags
		ie. for file backed page: (in-memory data revision >= on-disk one)
		4 - DIRTY
		page has been written to, hence contains new data
		ie. for file backed page: (in-memory data revision > on-disk one)
		i.e. for file backed page: (in-memory data revision > on-disk one)
		8 - WRITEBACK
		page is being synced to disk

		@@ -145,7 +145,7 @@ LRU related page flags
		page is in the active LRU list
		18 - UNEVICTABLE
		page is in the unevictable (non-)LRU list It is somehow pinned and
		not a candidate for LRU page reclaims, eg. ramfs pages,
		not a candidate for LRU page reclaims, e.g. ramfs pages,
		shmctl(SHM_LOCK) and mlock() memory segments
		2 - REFERENCED
		page has been referenced since last LRU list enqueue/requeue
		@@ -156,7 +156,7 @@ LRU related page flags
		12 - ANON
		a memory mapped page that is not part of a file
		13 - SWAPCACHE
		page is mapped to swap space, ie. has an associated swap entry
		page is mapped to swap space, i.e. has an associated swap entry
		14 - SWAPBACKED
		page is backed by swap/RAM