Commit d2b2250c authored Jun 11, 2018 by Linus Torvalds

ia64: disable CONFIG_PERFMON at least for now



Al noted that the semantics of the ia64 perfmon mmap() is really wrong,
and can cause serious VM problems.  Before we look at whether it needs
to be fixed, let's see if anybody even uses it, and mark it broken.  It
may be that we can just remove the code entirely.

Reported-by: Alexander Viro <viro@zeniv.linux.org.uk>
Acked-by: Matthew Wilcox <willy@infradead.org>
Acked-by: Stephane Eranian <eranian@google.com>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent d54d35c5

arch/ia64/Kconfig

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -455,6 +455,7 @@ config IA64_MCA_RECOVERY

	config PERFMON		config PERFMON
	bool "Performance monitor support"		bool "Performance monitor support"
			depends on BROKEN
	help		help
	Selects whether support for the IA-64 performance monitor hardware		Selects whether support for the IA-64 performance monitor hardware
	is included in the kernel. This makes some kernel data-structures a		is included in the kernel. This makes some kernel data-structures a