linux-kernel - Re: Fix "perf tools: Synthesize GROUP_DESC feature in pipe mode" in the LT 4.14 branch

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Message-ID: <CAD9gYJKvcn5kzMKhHU2UO=99Vdus_v=5D-fZb6-+Fy=gDokZFA@mail.gmail.com>
Date:   Fri, 21 Dec 2018 11:57:53 +0100
From:   Jinpu Wang <jinpuwang@...il.com>
To:     "Greensky, James J" <james.j.greensky@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "v3.14+, only the raid10 part" <stable@...r.kernel.org>
Subject: Re: Fix "perf tools: Synthesize GROUP_DESC feature in pipe mode" in
 the LT 4.14 branch

+cc Greg, stable

Greensky, James J <james.j.greensky@...el.com> 于2018年12月21日周五 上午11:48写道：
>
> Commit d38d272592737ea88a20 ("perf tools: Synthesize GROUP_DESC feature in pipe mode") broke the LT 4.14 branch when using event groups in pipe-mode.
>
>   # perf record -e '{cycles,instructions,branches}' -- sleep 4 | perf report
>   # To display the perf.data header info, please use --header/--header-only options
>   #
>   Oxd7c [0x60]: failed to process type: 80
>   Error:
>   Failed to process sample
>
> Commit a2015516c5c0be932a69 ("perf record: Synthesize features before events in pipe mode") is the fix. Can we get this cherry-picked and applied?
>