Messages in this thread Patch in this message | | | Date | Mon, 17 Mar 2014 19:17:06 -0700 | From | "Paul E. McKenney" <> | Subject | Re: cond_resched() and RCU CPU stall warnings |
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On Mon, Mar 17, 2014 at 06:14:34PM +0100, Peter Zijlstra wrote: > On Mon, Mar 17, 2014 at 09:58:07AM -0700, Paul E. McKenney wrote: > > @@ -4111,6 +4115,7 @@ int __sched __cond_resched_softirq(void) > > { > > BUG_ON(!in_softirq()); > > > > + rcu_cond_resched(); > > Don't you have to enable BHs before doing that? And if not; that needs a > comment for sure! :-)
No need to enable BHs, just RCU marking quiescent states. But yes, the name does look a bit scary in that context, doesn't it? Added a comment, please see below for updated patch.
> > if (should_resched()) { > > local_bh_enable(); > > __cond_resched(); > >
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torture: Better summary diagnostics for build failures
The reaction of kvm-recheck.sh is obscure at best, and easy to miss completely. This commit therefore prints "BUG: Build failed" in the summary at the end of a run.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck-lock.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck-lock.sh index 829186e19eb1..7f1ff1a8fc4b 100755 --- a/tools/testing/selftests/rcutorture/bin/kvm-recheck-lock.sh +++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck-lock.sh @@ -35,7 +35,7 @@ configfile=`echo $i | sed -e 's/^.*\///'` ncs=`grep "Writes: Total:" $i/console.log 2> /dev/null | tail -1 | sed -e 's/^.* Total: //' -e 's/ .*$//'` if test -z "$ncs" then - echo $configfile + echo "$configfile -------" else title="$configfile ------- $ncs acquisitions/releases" dur=`sed -e 's/^.* locktorture.shutdown_secs=//' -e 's/ .*$//' < $i/qemu-cmd 2> /dev/null` diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcu.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcu.sh index d75b1dc5ae53..307c4b95f325 100755 --- a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcu.sh +++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcu.sh @@ -35,7 +35,7 @@ configfile=`echo $i | sed -e 's/^.*\///'` ngps=`grep ver: $i/console.log 2> /dev/null | tail -1 | sed -e 's/^.* ver: //' -e 's/ .*$//'` if test -z "$ngps" then - echo $configfile + echo "$configfile -------" else title="$configfile ------- $ngps grace periods" dur=`sed -e 's/^.* rcutorture.shutdown_secs=//' -e 's/ .*$//' < $i/qemu-cmd 2> /dev/null` diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck.sh index 26d78b7eaccf..ee1f6cae3d70 100755 --- a/tools/testing/selftests/rcutorture/bin/kvm-recheck.sh +++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck.sh @@ -25,6 +25,7 @@ # Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com> PATH=`pwd`/tools/testing/selftests/rcutorture/bin:$PATH; export PATH +. tools/testing/selftests/rcutorture/bin/functions.sh for rd in "$@" do firsttime=1 @@ -39,13 +40,24 @@ do fi TORTURE_SUITE="`cat $i/../TORTURE_SUITE`" kvm-recheck-${TORTURE_SUITE}.sh $i - configcheck.sh $i/.config $i/ConfigFragment - parse-build.sh $i/Make.out $configfile - parse-torture.sh $i/console.log $configfile - parse-console.sh $i/console.log $configfile - if test -r $i/Warnings + if test -f "$i/console.log" then - cat $i/Warnings + configcheck.sh $i/.config $i/ConfigFragment + parse-build.sh $i/Make.out $configfile + parse-torture.sh $i/console.log $configfile + parse-console.sh $i/console.log $configfile + if test -r $i/Warnings + then + cat $i/Warnings + fi + else + if test -f "$i/qemu-cmd" + then + print_bug qemu failed + else + print_bug Build failed + fi + echo " $i" fi done done diff --git a/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh b/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh index 7a95f86cc85a..51c34a91a375 100755 --- a/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh +++ b/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh @@ -106,6 +106,7 @@ then fi else cp $builddir/Make*.out $resdir + cp $builddir/.config $resdir || : echo Build failed, not running KVM, see $resdir. if test -f $builddir.wait then
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