Date: Mon, 1 Nov 2004 20:55:41 +0100 From: Arjan de Vet <devet@devet.org> To: Robert Watson <rwatson@freebsd.org> Cc: current@freebsd.org Subject: Re: if_sk patch to get more info from people with problems Message-ID: <20041101195541.GA1461@adv.devet.org> In-Reply-To: <Pine.NEB.3.96L.1041101193549.87725D-100000@fledge.watson.org> References: <20041101164723.GA7375@adv.devet.org> <Pine.NEB.3.96L.1041101193549.87725D-100000@fledge.watson.org>
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Robert Watson wrote: >> I filed a bug report for if_sk.c for possibly related symptoms: >> >> http://www.freebsd.org/cgi/query-pr.cgi?pr=kern%2F73038 The >> IFF_NEEDSGIANT flag seems to solve the problem but I need to do much >> more testing with it this week (had to go back to 5.2.1 because 5.3 >> hangs for me after 1-1.5 days; still need to debug that one as well :(). > >Note that it could well be a locking bug in if_sk, but that >debug.mpsafenet and IFF_NEEDSGIANT both substantially change the timing in >the driver, so these changes could just mask an existing bug in your >configuration (yet still leave it present in other's). The if_de bug >recently, btw, turned out to be an existing (real) bug that was unmasked >due to timing changes from running with IFF_NEEDSGIANT, but was in fact >(we believe) present even with Giant over the stack... I just updated kern/73038 to say that the problem I was seeing seems to have disappeared with 5.3-RC2. I am now running 5.3-RC2 with an unmodified if_sk.c and without debug.mpsafenet=0 and so far all network connections behave as usual. Arjan -- Arjan de Vet, Eindhoven, The Netherlands <devet@devet.org> URL : http://www.devet.org/ <Arjan.deVet@adv.iae.nl> Work: http://www.madison-gurkha.com/ (Security, Open Source, Education)
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