tree eb6b7468b04cbe9fb13eb88aba94e0f28b3f4234
parent 605bfaee9078cd0b01d83402315389839ee4bb5c
author Frederic Weisbecker <fweisbec@gmail.com> 1259211878 +0100
committer Ingo Molnar <mingo@elte.hu> 1259224162 +0100

x86/hw-breakpoints: Don't lose GE flag while disabling a breakpoint

When we schedule out a breakpoint from the cpu, we also
incidentally remove the "Global exact breakpoint" flag from the
breakpoint control register. It makes us losing the fine grained
precision about the origin of the instructions that may trigger
breakpoint exceptions for the other breakpoints running in this
cpu.

Reported-by: Prasad <prasad@linux.vnet.ibm.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <1259211878-6013-1-git-send-regression-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>