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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <569EE4E6.7040804@huawei.com>
Date:	Wed, 20 Jan 2016 09:37:42 +0800
From:	"Wangnan (F)" <wangnan0@...wei.com>
To:	Alexei Starovoitov <alexei.starovoitov@...il.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 2016/1/20 1:42, Alexei Starovoitov wrote:
> 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.

I'll try it today. However, putting all of the three together is
not as easy as this patchset.

Thank you.