Date: Thu, 15 Sep 2011 07:01:34 -0600 From: "Justin T. Gibbs" <gibbs@scsiguy.com> To: Hugo Silva <hugo@barafranca.com> Cc: "freebsd-xen@freebsd.org" <freebsd-xen@freebsd.org> Subject: Re: [CFT][PATCH] Netfront fixes for FreeBSD-head [and an OT issue] Message-ID: <4E71F72E.4060401@scsiguy.com> In-Reply-To: <4E71D4E5.1020009@barafranca.com> References: <4E6E978C.5060608@scsiguy.com> <alpine.BSF.2.00.1109150420420.80106@tiktik.epipe.com> <4E71D4E5.1020009@barafranca.com>
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On 9/15/11 4:35 AM, Hugo Silva wrote: > On 09/15/11 05:43, Janne Snabb wrote: >> On Mon, 12 Sep 2011, Justin T. Gibbs wrote: >> >>> I'm planning to ask RE for permission to merge the following netfront >>> fixes (listed below) into 9.0/head. > Assuming this is the same patch that I posted on the list after someone > sent it to me, it seems to solve the problem (xn* works). It is similar, but not identical. If you have the resources to test my patch, I would appreciate it. > A major problem (and after the netdiff fix, the only one that comes to > mind in FreeBSD/Xen, from a SA PoV) right now is the VMs losing massive > amounts of time (just the other day I manually ran ntpdate, for a 1h > adjustment); started a thread last week or so, but it died down. > > It may not happen 100% of the time (calcru: runtime went backwards + > losing system time), as I remember that a couple of years ago several > people on the list had this problem while I wasn't experiencing it. > > Perhaps it depends on the dom0 OS, some system hardware.. I really have > no idea.. > > If someone else is running amd64 HVM+PV, let us know if you see the same? We run it at Spectra Logic. I can replicate the "calcru: runtime went backwards" issue if I do not pin our FreeBSD VM such that it exclusively owns the CPUs it uses. I have not had time to dig into this yet, since it is not a blocking bug for our product. I hope to have some time to work on this in a few weeks. -- Justin
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