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Re: Enabling linux kernel jit compiler from dumpcap?
From: Bálint Réczey <balint () balintreczey hu>
Date: Thu, 22 Aug 2013 23:02:40 +0200

Hi,

I would be happier if the applications I run did not change kernel
configuration without my consent.

Regarding Wireshark I would prefer suggesting "echo 1 >
/proc/sys/net/core/bpf_jit_enable" in the documentation
instead of adding code to enable JIT.
There may be good reasons for not enabling it by default in the Linux kernel.

Cheers,
Balint

2013/8/22 Anders Broman <a.broman () bredband net>:
Guy Harris skrev 2013-08-22 18:16:

On Aug 22, 2013, at 4:46 AM, Anders Broman <anders.broman () ericsson com>
wrote:

Should we add code to enable the JIT compiler from dumpcap?

Should I add code to enable the JIT compiler to libpcap while I'm at it?

Should the Linux kernel folks enable it by default?

I'm inclined to answer "yes" to all three questions.  I think the FreeBSD
JIT compiler is enabled by default.  I'm surprised that the Linux one isn't.

I checked in the dumpcap code. I agree that it might be useful in libpcap
too, root privileges are required to
change it I think. and Yes

I'm surprised that the Linux one isn't
Regards
Anders


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