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ia64: disable CONFIG_PERFMON at least for now

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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>
This commit is contained in:
Linus Torvalds 2018-06-11 11:55:04 -07:00
parent d54d35c501
commit d2b2250c3e
1 changed files with 1 additions and 0 deletions
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arch/ia64/Kconfig
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@ -455,6 +455,7 @@ config IA64_MCA_RECOVERY
config PERFMON
bool "Performance monitor support"
depends on BROKEN
help
Selects whether support for the IA-64 performance monitor hardware
is included in the kernel. This makes some kernel data-structures a