linux-kernel - Re: [RFC PATCH v6 00/32] perf tools: filtering events using eBPF programs

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <20150609214436.GK3136@kernel.org>
Date:	Tue, 9 Jun 2015 18:44:36 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Alexei Starovoitov <ast@...mgrid.com>
Cc:	Wang Nan <wangnan0@...wei.com>, brendan.d.gregg@...il.com,
	daniel@...earbox.net, namhyung@...nel.org,
	masami.hiramatsu.pt@...achi.com, paulus@...ba.org,
	a.p.zijlstra@...llo.nl, mingo@...hat.com, jolsa@...nel.org,
	dsahern@...il.com, linux-kernel@...r.kernel.org,
	lizefan@...wei.com, hekuang@...wei.com, xiakaixu@...wei.com,
	pi3orama@....com
Subject: Re: [RFC PATCH v6 00/32] perf tools: filtering events using eBPF
 programs

Em Tue, Jun 09, 2015 at 02:30:36PM -0700, Alexei Starovoitov escreveu:
> On 6/8/15 10:50 PM, Wang Nan wrote:
> >    # perf record --event lock_page.c ls /
> >    Added new event:
> >      perf_bpf_probe:lock_page (on __lock_page)
> >
> >    You can now use it in all perf tools, such as:

> agree with Arnaldo. The output is misleading.
> All these events will disappear when 'perf record' is over.
> Please trim it.
 
> btw we've been thinking how to make truly global programs
> and maps, so that they can be used in 'perf probe' interface.
> Right now in 'tc' we're using bpf_agent. It's a user space
> demon that keeps prog_fd and map_fds and passes them to other
> apps via scm_rights.
> We've started experimenting with fuse for this purpose as well,
> but that's similar user space demon and not very convenient
> for perf to talk to such fuse.
> The work in that area is still very rough, just fyi.

Cool stuff, but please leave us without daemons, we've exorcised from
day one ;-)

- 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/