Date: Thu, 07 Nov 2024 21:41:30 -0800 From: George Neville-Neil <gnn@neville-neil.com> To: Rick Macklem <rick.macklem@gmail.com> Cc: Mark Saad <nonesuch@longcount.org>, freebsd-net@freebsd.org Subject: Re: An interesting anomaly in NFS client... Message-ID: <DBB21A78-284C-4A97-892A-219E881D6DD8@neville-neil.com> In-Reply-To: <CAM5tNy7W9kHOFLoJWsU_1fU=%2BZ5OoDU7axw3izUv4GPWXpAF2A@mail.gmail.com> References: <8187509e-c9fb-403f-8569-28ba58425cff@FreeBSD.org> <D1D03377-1A7B-47FA-B40D-2A30D0855F07@longcount.org> <9BD96F0F-363F-45BF-B3AF-BDEBD4B46175@neville-neil.com> <CAM5tNy7W9kHOFLoJWsU_1fU=%2BZ5OoDU7axw3izUv4GPWXpAF2A@mail.gmail.com>
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On 7 Nov 2024, at 13:59, Rick Macklem wrote: > On Thu, Nov 7, 2024 at 9:34=E2=80=AFAM George Neville-Neil <gnn@neville= -neil.com> wrote: >> >> >> >> On 7 Nov 2024, at 4:15, Mark Saad wrote: >> >>>> >>>> On Nov 7, 2024, at 12:29=E2=80=AFAM, Andriy Gapon <avg@freebsd.org> = wrote: >>>> >>>> =EF=BB=BFOn 07/11/2024 02:43, George Neville-Neil wrote: >>>>> Howdy, >>>>> We've been digging into an interesting possible issue in the FreeBS= D NFS client. Here is the scenario. I have a FreeBSD VM on my Mac, the Ma= c is the NFS server, the VM is the client. >>> >>> What are you using to run the vm ? What architecture is the vm ? What= about the Mac ? >> >> qemu, aarch64, M3 Mac. >> >> I doubt this is the source of the issue. >> >> I was poking through the code and I wonder if a slight time skew might= be an issue. I'm going to check into that. The VM and the Mac both us = NTP to stay in sync with the world, but who knows... > Hi George, > > I'll take a look at the packet trace later, but... > > If you can easily reproduce the issue, do a: > # nfsstat -E -c -z > - before reproducing it, and a > # nfsstat -E -c > - after. Then look at the Cache Info: at the end of the output. > I'll give that a look, and the thing that Mark found is also interesting.= I might ask Warner about it tomorrow, we're both at the Dev Summit. Thanks, George
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