From: Shailabh Nagar <nagar@watson.ibm.com>
To: Jay Lan <jlan@engr.sgi.com>
Cc: Balbir Singh <balbir@in.ibm.com>,
LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>,
Chris Sturtivant <csturtiv@sgi.com>, Jamal <hadi@cyberus.ca>,
Thomas Graf <tgraf@suug.ch>
Subject: Re: ON/OFF control of taskstats accounting data at do_exit
Date: Thu, 15 Jun 2006 10:52:17 -0400 [thread overview]
Message-ID: <44917421.4070508@watson.ibm.com> (raw)
In-Reply-To: <4490D515.8070308@engr.sgi.com>
Jay Lan wrote:
>
> Are you saying if there is no listener, data will not be assembled and sent
> by the kernel? I thought kernel would always send no matter whether there
> is listener? I apologize for the noise if i made a mistake.
It will be assembled by taskstats. But afaict, the sending of data by the netlink layer will
be halted within netlink_broadcast(), which is a couple of calls down the call path from
genlmsg_multicast(), which is used by taskstats uses to send data out.
Lets discuss turning off of taskstats assembly separately.
Jamal, Thomas,
If there are no listeners on a genetlink socket, do you think overhead of kernel paths that
continue to attempt sending multicast data on genetlink sockets is an issue ?
--Shailabh
next prev parent reply other threads:[~2006-06-15 14:52 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-14 22:55 ON/OFF control of taskstats accounting data at do_exit Jay Lan
2006-06-15 3:01 ` Balbir Singh
2006-06-15 3:02 ` Shailabh Nagar
2006-06-15 3:33 ` Jay Lan
2006-06-15 14:52 ` Shailabh Nagar [this message]
2006-06-15 15:55 ` Shailabh Nagar
2006-06-15 17:24 ` Jay Lan
2006-06-15 18:14 ` Balbir Singh
2006-06-15 18:57 ` Jay Lan
2006-06-15 18:28 ` Shailabh Nagar
2006-06-15 23:41 ` Peter Williams
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