From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tilman Schmidt Subject: Re: NOHZ: local_softirq_pending 08 Date: Mon, 12 Oct 2009 13:25:07 +0200 Message-ID: <4AD31213.6020006@imap.cc> References: <4AD1BF06.3050103@phoenixsoftware.de> <1255261251.4095.143.camel@johannes.local> <4AD2E8C8.4060205@imap.cc> <20091012.033246.56701176.davem@davemloft.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: tilman@imap.cc, johannes@sipsolutions.net, hidave.darkstar@gmail.com, linux-kernel@vger.kernel.org, tglx@linutronix.de, linux-wireless@vger.kernel.org, linux-ppp@vger.kernel.org, netdev@vger.kernel.org, paulus@samba.org To: David Miller Return-path: In-Reply-To: <20091012.033246.56701176.davem@davemloft.net> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Mon, 12 Oct 2009 03:32:46 -0700 (PDT), David Miller wrote: > The PPP receive paths in ppp_generic.c do a local_bh_disable()/ > local_bh_enable() around packet receiving (via ppp_recv_lock()/ > ppp_recv_unlock() in ppp_do_recv). >=20 > So at least that part is perfectly fine. >=20 > ppp_input(), as called from ppp_sync_process(), also disables BH's > around ppp_do_recv() calls (via read_lock_bh()/read_unlock_bh()). >=20 > So that's fine too. >=20 > Do you have a bug report or are you just scanning around looking > for trouble? :-) I have encountered the message in the subject during a test of the Gigaset CAPI driver, and would like to determine whether it's a bug in the driver, a bug somewhere else, or no bug at all. The test scenario was PPP over ISDN with pppd+capiplugin. In an alternative scenario, also PPP over ISDN but with smpppd+capidrv, the message did not occur. Johannes' answer pointed me to the netif_rx() function. The Gigaset driver itself doesn't call that function at all. In the scenario where I saw the message, it was the SYNC_PPP line discipline that did. But from your explanation I gather that the cause cannot lie there. So now I'm looking for other possible causes of that message. - -- Tilman Schmidt E-Mail: tilman@imap.cc Bonn, Germany Diese Nachricht besteht zu 100% aus wiederverwerteten Bits. Unge=F6ffnet mindestens haltbar bis: (siehe R=FCckseite) -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFK0xITQ3+did9BuFsRAmXGAKCIiqJffUnuKw9rPjxHwbj9AnXOigCdGgS9 MpxRNGs0A4GTydYJaylbjyo=3D =3DLFxi -----END PGP SIGNATURE-----