Staging: Merge 2.6.37-rc2 into staging-next (491acf00) · Commits · 戴 / test

Documentation/ABI/obsolete/proc-pid-oom_adj

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		What: /proc/<pid>/oom_adj
		When: August 2012
		Why: /proc/<pid>/oom_adj allows userspace to influence the oom killer's
		badness heuristic used to determine which task to kill when the kernel
		is out of memory.

		The badness heuristic has since been rewritten since the introduction of
		this tunable such that its meaning is deprecated. The value was
		implemented as a bitshift on a score generated by the badness()
		function that did not have any precise units of measure. With the
		rewrite, the score is given as a proportion of available memory to the
		task allocating pages, so using a bitshift which grows the score
		exponentially is, thus, impossible to tune with fine granularity.

		A much more powerful interface, /proc/<pid>/oom_score_adj, was
		introduced with the oom killer rewrite that allows users to increase or
		decrease the badness() score linearly. This interface will replace
		/proc/<pid>/oom_adj.

		A warning will be emitted to the kernel log if an application uses this
		deprecated interface. After it is printed once, future warnings will be
		suppressed until the kernel is rebooted.

+4 −3

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		@@ -255,9 +255,10 @@ framebuffer parameters.
		Kernel boot arguments
		---------------------

		vram=<size>
		- Amount of total VRAM to preallocate. For example, "10M". omapfb
		allocates memory for framebuffers from VRAM.
		vram=<size>[,<physaddr>]
		- Amount of total VRAM to preallocate and optionally a physical start
		memory address. For example, "10M". omapfb allocates memory for
		framebuffers from VRAM.

		omapfb.mode=<display>:<mode>[,...]
		- Default video mode for specified displays. For example,

+4 −4

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		@@ -16,7 +16,7 @@ you can do so by typing:
		As of the Linux 2.6.10 kernel, it is now possible to change the
		IO scheduler for a given block device on the fly (thus making it possible,
		for instance, to set the CFQ scheduler for the system default, but
		set a specific device to use the anticipatory or noop schedulers - which
		set a specific device to use the deadline or noop schedulers - which
		can improve that device's throughput).

		To set a specific scheduler, simply do this:
		@@ -31,7 +31,7 @@ a "cat /sys/block/DEV/queue/scheduler" - the list of valid names
		will be displayed, with the currently selected scheduler in brackets:

		# cat /sys/block/hda/queue/scheduler
		noop anticipatory deadline [cfq]
		# echo anticipatory > /sys/block/hda/queue/scheduler
		noop deadline [cfq]
		# echo deadline > /sys/block/hda/queue/scheduler
		# cat /sys/block/hda/queue/scheduler
		noop [anticipatory] deadline cfq
		noop [deadline] cfq

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		@@ -554,3 +554,13 @@ Why: This is a legacy interface which have been replaced by a more
		Who: NeilBrown <neilb@suse.de>

		----------------------------

		What: i2c_adapter.id
		When: June 2011
		Why: This field is deprecated. I2C device drivers shouldn't change their
		behavior based on the underlying I2C adapter. Instead, the I2C
		adapter driver should instantiate the I2C devices and provide the
		needed platform-specific information.
		Who: Jean Delvare <khali@linux-fr.org>

		----------------------------

+0 −11

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		@@ -794,17 +794,6 @@ designed.

		Roadmap:

		2.6.37 Remove experimental tag from mount option
		=> should be roughly 6 months after initial merge
		=> enough time to:
		=> gain confidence and fix problems reported by early
		adopters (a.k.a. guinea pigs)
		=> address worst performance regressions and undesired
		behaviours
		=> start tuning/optimising code for parallelism
		=> start tuning/optimising algorithms consuming
		excessive CPU time

		2.6.39 Switch default mount option to use delayed logging
		=> should be roughly 12 months after initial merge
		=> enough time to shake out remaining problems before next round of