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Niklas Cassel 8d5755b3f7 watchdog: softdog: fire watchdog even if softirqs do not get to run Checking for timer expiration is done from the softirq TIMER_SOFTIRQ. Since commit `4cd13c21b2` ("softirq: Let ksoftirqd do its job"), pending softirqs are no longer always handled immediately, instead, if there are pending softirqs, and ksoftirqd is in state TASK_RUNNING, the handling of the softirqs are deferred, and are instead supposed to be handled by ksoftirqd, when ksoftirqd gets scheduled. If a user space process with a real-time policy starts to misbehave by never relinquishing the CPU while ksoftirqd is in state TASK_RUNNING, what will happen is that all softirqs will get deferred, while ksoftirqd, which is supposed to handle the deferred softirqs, will never get to run. To make sure that the watchdog is able to fire even when we do not get to run softirqs, replace the timers with hrtimers. Signed-off-by: Niklas Cassel <niklas.cassel@axis.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>		2017-03-01 06:15:10 -08:00
arch	Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm	2017-02-28 11:50:53 -08:00
block	lib/vsprintf.c: remove %Z support	2017-02-27 18:43:47 -08:00
certs
crypto	crypto: change LZ4 modules to work with new LZ4 module version	2017-02-24 17:46:57 -08:00
Documentation	This is a few small fixes to the main IPMI driver, make some	2017-02-28 21:06:30 -08:00
drivers	watchdog: softdog: fire watchdog even if softirqs do not get to run	2017-03-01 06:15:10 -08:00
firmware
fs	The nfsd update this round is mainly a lot of miscellaneous cleanups and	2017-02-28 15:39:09 -08:00
include	This is a few small fixes to the main IPMI driver, make some	2017-02-28 21:06:30 -08:00
init	Merge branch 'idr-4.11' of git://git.infradead.org/users/willy/linux-dax	2017-02-28 20:29:41 -08:00
ipc	ipc/shm: Fix shmat mmap nil-page protection	2017-02-27 18:43:46 -08:00
kernel	Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-02-28 11:44:01 -08:00
lib	Merge branch 'idr-4.11' of git://git.infradead.org/users/willy/linux-dax	2017-02-28 20:29:41 -08:00
mm	Merge branch 'idr-4.11' of git://git.infradead.org/users/willy/linux-dax	2017-02-28 20:29:41 -08:00
net	Merge branch 'idr-4.11' of git://git.infradead.org/users/willy/linux-dax	2017-02-28 20:29:41 -08:00
samples	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2017-02-22 10:15:09 -08:00
scripts	checkpatch: warn when formats use %Z and suggest %z	2017-02-27 18:43:48 -08:00
security	lib/vsprintf.c: remove %Z support	2017-02-27 18:43:47 -08:00
sound	lib/vsprintf.c: remove %Z support	2017-02-27 18:43:47 -08:00
tools	Merge branch 'idr-4.11' of git://git.infradead.org/users/willy/linux-dax	2017-02-28 20:29:41 -08:00
usr
virt	mm: add new mmget() helper	2017-02-27 18:43:48 -08:00
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS	kprobes: move kprobe declarations to asm-generic/kprobes.h	2017-02-27 18:43:45 -08:00
Makefile	Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-02-28 10:15:59 -08:00
README

README

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.