Merge branch 'akpm' (patches from Andrew) (d34fc1ad) · Commits · 戴 / test

Documentation/ABI/testing/procfs-smaps_rollup

0 → 100644

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			What: /proc/pid/smaps_rollup
			Date: August 2017
			Contact: Daniel Colascione <dancol@google.com>
			Description:
			This file provides pre-summed memory information for a
			process. The format is identical to /proc/pid/smaps,
			except instead of an entry for each VMA in a process,
			smaps_rollup has a single entry (tagged "[rollup]")
			for which each field is the sum of the corresponding
			fields from all the maps in /proc/pid/smaps.
			For more details, see the procfs man page.

			Typical output looks like this:

			00100000-ff709000 ---p 00000000 00:00 0 [rollup]
			Rss: 884 kB
			Pss: 385 kB
			Shared_Clean: 696 kB
			Shared_Dirty: 0 kB
			Private_Clean: 120 kB
			Private_Dirty: 68 kB
			Referenced: 884 kB
			Anonymous: 68 kB
			LazyFree: 0 kB
			AnonHugePages: 0 kB
			ShmemPmdMapped: 0 kB
			Shared_Hugetlb: 0 kB
			Private_Hugetlb: 0 kB
			Swap: 0 kB
			SwapPss: 0 kB
			Locked: 385 kB

+8 −0

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	@@ -90,3 +90,11 @@ Description:
	device's debugging info useful for kernel developers. Its		device's debugging info useful for kernel developers. Its
	format is not documented intentionally and may change		format is not documented intentionally and may change
	anytime without any notice.		anytime without any notice.

			What: /sys/block/zram<id>/backing_dev
			Date: June 2017
			Contact: Minchan Kim <minchan@kernel.org>
			Description:
			The backing_dev file is read-write and set up backing
			device for zram to write incompressible pages.
			For using, user should enable CONFIG_ZRAM_WRITEBACK.

0 → 100644

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			What: /sys/kernel/mm/swap/
			Date: August 2017
			Contact: Linux memory management mailing list <linux-mm@kvack.org>
			Description: Interface for swapping

			What: /sys/kernel/mm/swap/vma_ra_enabled
			Date: August 2017
			Contact: Linux memory management mailing list <linux-mm@kvack.org>
			Description: Enable/disable VMA based swap readahead.

			If set to true, the VMA based swap readahead algorithm
			will be used for swappable anonymous pages mapped in a
			VMA, and the global swap readahead algorithm will be
			still used for tmpfs etc. other users. If set to
			false, the global swap readahead algorithm will be
			used for all swappable pages.

			What: /sys/kernel/mm/swap/vma_ra_max_order
			Date: August 2017
			Contact: Linux memory management mailing list <linux-mm@kvack.org>
			Description: The max readahead size in order for VMA based swap readahead

			VMA based swap readahead algorithm will readahead at
			most 1 << max_order pages for each readahead. The
			real readahead size for each readahead will be scaled
			according to the estimation algorithm.

+1 −1

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	@@ -2783,7 +2783,7 @@
	Allowed values are enable and disable		Allowed values are enable and disable

	numa_zonelist_order= [KNL, BOOT] Select zonelist order for NUMA.		numa_zonelist_order= [KNL, BOOT] Select zonelist order for NUMA.
	one of ['zone', 'node', 'default'] can be specified		'node', 'default' can be specified
	This can be set from sysctl after boot.		This can be set from sysctl after boot.
	See Documentation/sysctl/vm.txt for details.		See Documentation/sysctl/vm.txt for details.

+11 −0

Original line number	Original line	Diff line number	Diff line
	@@ -168,6 +168,7 @@ max_comp_streams RW the number of possible concurrent compress operations
	comp_algorithm RW show and change the compression algorithm		comp_algorithm RW show and change the compression algorithm
	compact WO trigger memory compaction		compact WO trigger memory compaction
	debug_stat RO this file is used for zram debugging purposes		debug_stat RO this file is used for zram debugging purposes
			backing_dev RW set up backend storage for zram to write out


	User space is advised to use the following files to read the device statistics.		User space is advised to use the following files to read the device statistics.
	@@ -231,5 +232,15 @@ line of text and contains the following stats separated by whitespace:
	resets the disksize to zero. You must set the disksize again		resets the disksize to zero. You must set the disksize again
	before reusing the device.		before reusing the device.

			* Optional Feature

			= writeback

			With incompressible pages, there is no memory saving with zram.
			Instead, with CONFIG_ZRAM_WRITEBACK, zram can write incompressible page
			to backing storage rather than keeping it in memory.
			User should set up backing device via /sys/block/zramX/backing_dev
			before disksize setting.

	Nitin Gupta		Nitin Gupta
	ngupta@vflare.org		ngupta@vflare.org