Merge "add documentation about reclaim knob on proc.txt" (ae6e640c) · Commits · e / devices / android_kernel_fairphone_FP4

Documentation/filesystems/proc.txt

+20 −0

Original line number	Diff line number	Diff line
		@@ -139,6 +139,7 @@ Table 1-1: Process specific entries in /proc
		maps Memory maps to executables and library files (2.4)
		mem Memory held by this process
		root Link to the root directory of this process
		reclaim Reclaim pages in this process
		stat Process status
		statm Process memory status information
		status Process status in human readable form
		@@ -543,6 +544,25 @@ current value:

		Any other value written to /proc/PID/clear_refs will have no effect.

		The file /proc/PID/reclaim is used to reclaim pages in this process.
		To reclaim file-backed pages,
		> echo file > /proc/PID/reclaim

		To reclaim anonymous pages,
		> echo anon > /proc/PID/reclaim

		To reclaim all pages,
		> echo all > /proc/PID/reclaim

		Also, you can specify address range of process so part of address space
		will be reclaimed. The format is following as
		> echo addr size-byte > /proc/PID/reclaim

		NOTE: addr should be page-aligned.

		Below is example which try to reclaim 2M from 0x100000.
		> echo 0x100000 2M > /proc/PID/reclaim

		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