linux-kernel - Re: [PATCH 0/6] perf core: Read from overwrite ring buffer

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Message-ID: <20160119174239.GA83683@ast-mbp.thefacebook.com>
Date:	Tue, 19 Jan 2016 09:42:40 -0800
From:	Alexei Starovoitov <alexei.starovoitov@...il.com>
To:	Wang Nan <wangnan0@...wei.com>
Cc:	peterz@...radead.org, ast@...nel.org, linux-kernel@...r.kernel.org,
	He Kuang <hekuang@...wei.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Brendan Gregg <brendan.d.gregg@...il.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Zefan Li <lizefan@...wei.com>, pi3orama@....com
Subject: Re: [PATCH 0/6] perf core: Read from overwrite ring buffer

On Tue, Jan 19, 2016 at 11:16:44AM +0000, Wang Nan wrote:
> This patchset introduces two methods to support reading from overwrite.
> 
>  1) Tailsize: write the size of an event at the end of it
>  2) Backward writing: write the ring buffer from the end of it to the
>     beginning.

what happend with your other idea of moving the whole header to the end?
That felt better than either of these options.