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From: Josh Hunt <johunt@akamai.com>
To: john@metanate.com, jolsa@kernel.org,
	alexander.shishkin@linux.intel.com, khlebnikov@yandex-team.ru,
	namhyung@kernel.org, peterz@infradead.org, acme@redhat.com
Cc: linux-kernel@vger.kernel.org
Subject: 4.19 dwarf unwinding broken
Date: Thu, 3 Oct 2019 00:54:09 -0700	[thread overview]
Message-ID: <ab87d20b-526c-9435-0532-c298beeb0318@akamai.com> (raw)

The following commit is breaking dwarf unwinding on 4.19 kernels:

commit e5adfc3e7e774ba86f7bb725c6eef5f32df8630e
Author: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Date:   Tue Aug 7 12:09:01 2018 +0300

     perf map: Synthesize maps only for thread group leader

It looks like this was fixed later by:

commit e8ba2906f6b9054102ad035ac9cafad9d4168589
Author: John Keeping <john@metanate.com>
Date:   Thu Aug 15 11:01:45 2019 +0100

     perf unwind: Fix libunwind when tid != pid

but was not selected as a backport to 4.19. Are there plans to backport 
the fix? If not, could we have the breaking commit reverted in 4.19 LTS?

Thanks
Josh

             reply	other threads:[~2019-10-03  7:54 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-03  7:54 Josh Hunt [this message]
2019-10-03 10:03 ` 4.19 dwarf unwinding broken Jiri Olsa
2019-10-03 15:17   ` Josh Hunt
2019-10-03 16:04     ` Arnaldo Carvalho de Melo

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