#!/bin/sh # description: event trigger - test multiple histogram triggers do_reset() { reset_trigger echo > set_event clear_trace } fail() { #msg do_reset echo $1 exit $FAIL } if [ ! -f set_event -o ! -d events/sched ]; then echo "event tracing is not supported" exit_unsupported fi if [ ! -f events/sched/sched_process_fork/trigger ]; then echo "event trigger is not supported" exit_unsupported fi if [ ! -f events/sched/sched_process_fork/hist ]; then echo "hist trigger is not supported" exit_unsupported fi reset_tracer do_reset reset_trigger echo "Test histogram multiple tiggers" echo 'hist:keys=parent_pid:vals=child_pid' > events/sched/sched_process_fork/trigger echo 'hist:keys=parent_comm:vals=child_pid' >> events/sched/sched_process_fork/trigger for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done grep parent_pid events/sched/sched_process_fork/hist > /dev/null || \ fail "hist trigger on sched_process_fork did not work" grep child events/sched/sched_process_fork/hist > /dev/null || \ fail "hist trigger on sched_process_fork did not work" COMM=`cat /proc/$$/comm` grep "parent_comm: $COMM" events/sched/sched_process_fork/hist > /dev/null || \ fail "string key on sched_process_fork did not work" reset_trigger echo "Test histogram with its name" echo 'hist:name=test_hist:keys=common_pid' > events/sched/sched_process_fork/trigger for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done grep test_hist events/sched/sched_process_fork/hist > /dev/null || \ fail "named event on sched_process_fork did not work" echo "Test same named histogram on different events" echo 'hist:name=test_hist:keys=common_pid' > events/sched/sched_process_exit/trigger for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done grep test_hist events/sched/sched_process_exit/hist > /dev/null || \ fail "named event on sched_process_fork did not work" diffs=`diff events/sched/sched_process_exit/hist events/sched/sched_process_fork/hist | wc -l` test $diffs -eq 0 || fail "Same name histograms are not same" reset_trigger do_reset exit 0 ve&id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'>diff
path: root/tools/spi
diff options
context:
space:
mode:
authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2017-02-03 17:10:28 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2017-02-08 23:36:29 +1100
commitd7df2443cd5f67fc6ee7c05a88e4996e8177f91b (patch)
tree098a7c0ca4fceb8a65cb1f693c9d71990388933d /tools/spi
parenta0615a16f7d0ceb5804d295203c302d496d8ee91 (diff)
powerpc/mm: Fix spurrious segfaults on radix with autonuma
When autonuma (Automatic NUMA balancing) marks a PTE inaccessible it clears all the protection bits but leave the PTE valid. With the Radix MMU, an attempt at executing from such a PTE will take a fault with bit 35 of SRR1 set "SRR1_ISI_N_OR_G". It is thus incorrect to treat all such faults as errors. We should pass them to handle_mm_fault() for autonuma to deal with. The case of pages that are really not executable is handled by the existing test for VM_EXEC further down. That leaves us with catching the kernel attempts at executing user pages. We can catch that earlier, even before we do find_vma. It is never valid on powerpc for the kernel to take an exec fault to begin with. So fold that test with the existing test for the kernel faulting on kernel addresses to bail out early. Fixes: 1d18ad026844 ("powerpc/mm: Detect instruction fetch denied and report") Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'tools/spi')