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Message-ID: <20120411144716.GC16257@infradead.org> Date: Wed, 11 Apr 2012 11:47:16 -0300 From: Arnaldo Carvalho de Melo <acme@...stprotocols.net> To: David Ahern <dsahern@...il.com> Cc: "Nikunj A. Dadhania" <nikunj@...ux.vnet.ibm.com>, mingo@...hat.com, a.p.zijlstra@...llo.nl, paulus@...ba.org, fweisbec@...il.com, eranian@...gle.com, linux-kernel@...r.kernel.org Subject: Re: [BUG PATCH] perf: kvm - finding struct machine fails for PERF_RECORD_MMAP Em Tue, Apr 10, 2012 at 09:16:37AM -0600, David Ahern escreveu: > On 4/9/12 2:22 AM, Nikunj A. Dadhania wrote: > >Running 'perf kvm --host --guest --guestmount /tmp/guestmount record -a -g -- sleep 2' > > > >Was resulting in a segfault. For event type PERF_RECORD_MMAP, > >event->ip.pid is being used in perf_session__find_machine_for_cpumode, > >which is not correct. > > > >event->ip.pid happens to be 0 in this case and results in returning a > >NULL machine object. Finally, access to self->pid in > >machine__mmap_name, results in a segfault later. > > > >For PERF_RECORD_MMAP type, pass event->mmap.pid. > > Reviewed-by: David Ahern <dsahern@...il.com> > Tested-by: David Ahern <dsahern@...il.com> Thanks guys, applied this to my perf/urgent branch. - Arnaldo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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