Date: Wed, 19 Oct 2016 22:42:39 -0700 From: Gleb Smirnoff <glebius@FreeBSD.org> To: Mike Karels <mike@karels.net> Cc: George Neville-Neil <gnn@freebsd.org>, net@FreeBSD.org Subject: Re: TCP route caching panic Message-ID: <20161020054239.GP27748@FreeBSD.org> In-Reply-To: <201610200532.u9K5WHH8018605@mail.karels.net> References: <20161020022107.GO27748@FreeBSD.org> <201610200532.u9K5WHH8018605@mail.karels.net>
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On Thu, Oct 20, 2016 at 12:32:17AM -0500, Mike Karels wrote: M> > On Wed, Oct 19, 2016 at 07:26:44PM -0500, Mike Karels wrote: M> > M> > On Wed, Oct 19, 2016 at 02:29:14PM -0700, Gleb Smirnoff wrote: M> > M> > T> Hi! M> > M> > T> M> > M> > T> I got this panic in a bhyve VM, which was just compiling stuff M> > M> > T> and had two ssh sessions open. It has static network configuration, M> > M> > T> one interfaces, one IP address, IPv4 only and it sees only hardware M> > M> > T> address of the host. So it is minimal possible configuration. It M> > M> > T> runs with INVARIANTS. M> > M> M> > M> > Important note that kernel has FLOWTABLE option. And recently I refined M> > M> > the original fix of FLOWTABLE+inpcb_route_cache. This might be related, M> > M> > but I don't see how. The inp code explicitly nulls the ro_lle when M> > M> > it frees it. M> > M> M> > M> Hmm, I run a similar configuration, but may not run as many compiles. M> > M> I'm running a recent head GENERIC system, so has INVARIANTS. I've M> > M> tested with FLOWTABLE in the past; I'll try it again now. M> > M> M> > M> But if I understand correctly, you have modifications? Could we see M> > M> them (assuming they are not in the tree, I haven't been watching closely)? M> M> > No, I don't have modifications. M> M> Sorry then, what did you mean by this: M> M> And recently I refined the original fix of FLOWTABLE+inpcb_route_cache. M> This might be related, That is already checked in as r307234. M> I've run one buildworld in s aimilar environment so far today, using NFS M> to the host for the sources. I'll try another. I also failed to reproduce for the last several hours. Will keep you updated, since I use the VM daily. -- Totus tuus, Glebius.
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