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#
# Unix Domain Sockets
#

config UNIX
	tristate "Unix domain sockets"
	---help---
	  If you say Y here, you will include support for Unix domain sockets;
	  sockets are the standard Unix mechanism for establishing and
	  accessing network connections.  Many commonly used programs such as
	  the X Window system and syslog use these sockets even if your
	  machine is not connected to any network.  Unless you are working on
	  an embedded system or something similar, you therefore definitely
	  want to say Y here.

	  To compile this driver as a module, choose M here: the module will be
	  called unix.  Note that several important services won't work
	  correctly if you say M here and then neglect to load the module.

	  Say Y unless you know what you are doing.

config UNIX_DIAG
	tristate "UNIX: socket monitoring interface"
	depends on UNIX
	default n
	---help---
	  Support for UNIX socket monitoring interface used by the ss tool.
	  If unsure, say Y.
handling more robust
Erik reported that on a preproduction hardware a CMCI storm triggers the BUG_ON in add_timer_on(). The reason is that the per CPU MCE timer is started by the CMCI logic before the MCE CPU hotplug callback starts the timer with add_timer_on(). So the timer is already queued which triggers the BUG. Using add_timer_on() is pretty pointless in this code because the timer is strictlty per CPU, initialized as pinned and all operations which arm the timer happen on the CPU to which the timer belongs. Simplify the whole machinery by using mod_timer() instead of add_timer_on() which avoids the problem because mod_timer() can handle already queued timers. Use __start_timer() everywhere so the earliest armed expiry time is preserved. Reported-by: Erik Veijola <erik.veijola@intel.com> Tested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@alien8.de> Cc: Tony Luck <tony.luck@intel.com> Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701310936080.3457@nanos Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'net/ipv6/esp6.c')