Files
android_kernel_motorola_sm6225/Documentation/sysctl
Greg Kroah-Hartman 0e19062e22 Merge 4.19.287 into android-4.19-stable
Changes in 4.19.287
	power: supply: ab8500: Fix external_power_changed race
	power: supply: bq27xxx: Use mod_delayed_work() instead of cancel() + schedule()
	ARM: dts: vexpress: add missing cache properties
	power: supply: Ratelimit no data debug output
	regulator: Fix error checking for debugfs_create_dir
	irqchip/meson-gpio: Mark OF related data as maybe unused
	power: supply: Fix logic checking if system is running from battery
	parisc: Improve cache flushing for PCXL in arch_sync_dma_for_cpu()
	MIPS: Alchemy: fix dbdma2
	mips: Move initrd_start check after initrd address sanitisation.
	xen/blkfront: Only check REQ_FUA for writes
	ocfs2: fix use-after-free when unmounting read-only filesystem
	ocfs2: check new file size on fallocate call
	nios2: dts: Fix tse_mac "max-frame-size" property
	nilfs2: fix incomplete buffer cleanup in nilfs_btnode_abort_change_key()
	nilfs2: fix possible out-of-bounds segment allocation in resize ioctl
	kexec: support purgatories with .text.hot sections
	powerpc/purgatory: remove PGO flags
	nouveau: fix client work fence deletion race
	RDMA/uverbs: Restrict usage of privileged QKEYs
	net: usb: qmi_wwan: add support for Compal RXM-G1
	Remove DECnet support from kernel
	USB: serial: option: add Quectel EM061KGL series
	usb: dwc3: gadget: Reset num TRBs before giving back the request
	usb: gadget: f_ncm: Add OS descriptor support
	usb: gadget: f_ncm: Fix NTP-32 support
	netfilter: nfnetlink: skip error delivery on batch in case of ENOMEM
	ping6: Fix send to link-local addresses with VRF.
	RDMA/rxe: Remove the unused variable obj
	RDMA/rxe: Removed unused name from rxe_task struct
	RDMA/rxe: Fix the use-before-initialization error of resp_pkts
	IB/uverbs: Fix to consider event queue closing also upon non-blocking mode
	IB/isert: Fix dead lock in ib_isert
	IB/isert: Fix possible list corruption in CMA handler
	IB/isert: Fix incorrect release of isert connection
	sctp: fix an error code in sctp_sf_eat_auth()
	igb: fix nvm.ops.read() error handling
	drm/nouveau/dp: check for NULL nv_connector->native_mode
	drm/nouveau/kms: Don't change EDID when it hasn't actually changed
	drm/nouveau: add nv_encoder pointer check for NULL
	net: lapbether: only support ethernet devices
	net: tipc: resize nlattr array to correct size
	selftests/ptp: Fix timestamp printf format for PTP_SYS_OFFSET
	neighbour: Remove unused inline function neigh_key_eq16()
	net: Remove unused inline function dst_hold_and_use()
	neighbour: delete neigh_lookup_nodev as not used
	drm/nouveau/kms: Fix NULL pointer dereference in nouveau_connector_detect_depth
	powerpc: Fix defconfig choice logic when cross compiling
	mmc: block: ensure error propagation for non-blk
	Linux 4.19.287

Change-Id: Ib4119b05e8fe06820cd2d6f3aa66a7e7e8cc5100
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2023-06-21 16:30:35 +00:00
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2023-06-21 15:39:57 +02:00
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Documentation for /proc/sys/		kernel version 2.2.10
	(c) 1998, 1999,  Rik van Riel <riel@nl.linux.org>

'Why', I hear you ask, 'would anyone even _want_ documentation
for them sysctl files? If anybody really needs it, it's all in
the source...'

Well, this documentation is written because some people either
don't know they need to tweak something, or because they don't
have the time or knowledge to read the source code.

Furthermore, the programmers who built sysctl have built it to
be actually used, not just for the fun of programming it :-)

==============================================================

Legal blurb:

As usual, there are two main things to consider:
1. you get what you pay for
2. it's free

The consequences are that I won't guarantee the correctness of
this document, and if you come to me complaining about how you
screwed up your system because of wrong documentation, I won't
feel sorry for you. I might even laugh at you...

But of course, if you _do_ manage to screw up your system using
only the sysctl options used in this file, I'd like to hear of
it. Not only to have a great laugh, but also to make sure that
you're the last RTFMing person to screw up.

In short, e-mail your suggestions, corrections and / or horror
stories to: <riel@nl.linux.org>

Rik van Riel.

==============================================================

Introduction:

Sysctl is a means of configuring certain aspects of the kernel
at run-time, and the /proc/sys/ directory is there so that you
don't even need special tools to do it!
In fact, there are only four things needed to use these config
facilities:
- a running Linux system
- root access
- common sense (this is especially hard to come by these days)
- knowledge of what all those values mean

As a quick 'ls /proc/sys' will show, the directory consists of
several (arch-dependent?) subdirs. Each subdir is mainly about
one part of the kernel, so you can do configuration on a piece
by piece basis, or just some 'thematic frobbing'.

The subdirs are about:
abi/		execution domains & personalities
debug/		<empty>
dev/		device specific information (eg dev/cdrom/info)
fs/		specific filesystems
		filehandle, inode, dentry and quota tuning
		binfmt_misc <Documentation/admin-guide/binfmt-misc.rst>
kernel/		global kernel info / tuning
		miscellaneous stuff
net/		networking stuff, for documentation look in:
		<Documentation/networking/>
proc/		<empty>
sunrpc/		SUN Remote Procedure Call (NFS)
vm/		memory management tuning
		buffer and cache management
user/		Per user per user namespace limits

These are the subdirs I have on my system. There might be more
or other subdirs in another setup. If you see another dir, I'd
really like to hear about it :-)