#!/bin/sh # description: event trigger - test histogram trigger 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 echo "Test histogram basic tigger" echo 'hist:keys=parent_pid: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" reset_trigger echo "Test histogram with compound keys" echo 'hist:keys=parent_pid,child_pid' > events/sched/sched_process_fork/trigger for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done grep '^{ parent_pid:.*, child_pid:.*}' events/sched/sched_process_fork/hist > /dev/null || \ fail "compound keys on sched_process_fork did not work" reset_trigger echo "Test histogram with string key" echo 'hist:keys=parent_comm' > events/sched/sched_process_fork/trigger for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done 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 sort key" echo 'hist:keys=parent_pid,child_pid:sort=child_pid.ascending' > events/sched/sched_process_fork/trigger for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done check_inc() { while [ $# -gt 1 ]; do [ $1 -gt $2 ] && return 1 shift 1 done return 0 } check_inc `grep -o "child_pid:[[:space:]]*[[:digit:]]*" \ events/sched/sched_process_fork/hist | cut -d: -f2 ` || fail "sort param on sched_process_fork did not work" do_reset exit 0 s/testing/selftests/exec'>
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authorJason Baron <jbaron@akamai.com>2016-12-12 16:46:40 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-12 18:55:10 -0800
commit30f74aa0854c2d5a331b507b14fe421ba4980511 (patch)
treedb150237a10336a84e822e626e275374a5485b67 /tools/testing/selftests/exec
parenta82603a8325f89ec53d4c3e249a2e831b747a69d (diff)
binfmt_elf: use vmalloc() for allocation of vma_filesz
We have observed page allocations failures of order 4 during core dump while trying to allocate vma_filesz. This results in a useless core file of size 0. To improve reliability use vmalloc(). Note that the vmalloc() allocation is bounded by sysctl_max_map_count, which is 65,530 by default. So with a 4k page size, and 8 bytes per seg, this is a max of 128 pages or an order 7 allocation. Other parts of the core dump path, such as fill_files_note() are already using vmalloc() for presumably similar reasons. Link: http://lkml.kernel.org/r/1479745791-17611-1-git-send-email-jbaron@akamai.com Signed-off-by: Jason Baron <jbaron@akamai.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools/testing/selftests/exec')