On Sun, Oct 16, 2016 at 09:14:45AM +0200, Ingo Molnar wrote: > > * Laura Abbott <labb...@redhat.com> wrote: > > > On 10/12/2016 03:12 AM, Jiri Olsa wrote: > > >On Tue, Oct 11, 2016 at 02:18:49PM -0700, Laura Abbott wrote: > > >>On 10/11/2016 01:59 PM, Jiri Olsa wrote: > > >>>On Tue, Oct 11, 2016 at 01:43:36PM -0700, Laura Abbott wrote: > > >>>>Hi, > > >>>> > > >>>>While building today's Fedora rawhide kernel, there was a failure > > >>>>building perf with -j4 [1]: > > > > > >ok, the -j 4 is the problem > > > > > >running "make -j 4 install-bin install-traceevent-plugins" > > > > > > BUILD: Doing 'make -j4' parallel build > > > BUILD: Doing 'make -j4' parallel build > > > > > >will run paralel make instances for install-bin and > > >install-traceevent-plugins > > >which will eventually touch same files and crash.. > > > > > >the main perf Makefile is actualy detecting number of cpus > > >and runs Makefile.perf with -j X option so there's no need > > >to specify it on top level.. you can always customize it via > > >JOBS=X make variable > > > > > >so if you don't specify the -j X option it will run the > > >'Makefile.perf install-bin install-traceevent-plugins' with > > >-j X set and it should execute sequentialy and fix your problem > > > > > > > Thanks for pointing that out. The build command has been there > > a while and apparently has bit rotted. I've removed the extra > > -j X flags from the command. > > It would also be nice to fix the underlying perf build system problem as > well: it > should be entirely fine for people to type 'make -j4'. >
ok, will check on that jirka
