Date: Thu, 7 Nov 2024 07:15:08 -0500 From: Mark Saad <nonesuch@longcount.org> To: freebsd-net@freebsd.org Subject: Re: An interesting anomaly in NFS client... Message-ID: <D1D03377-1A7B-47FA-B40D-2A30D0855F07@longcount.org> In-Reply-To: <8187509e-c9fb-403f-8569-28ba58425cff@FreeBSD.org> References: <8187509e-c9fb-403f-8569-28ba58425cff@FreeBSD.org>
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>=20 > On Nov 7, 2024, at 12:29=E2=80=AFAM, Andriy Gapon <avg@freebsd.org> wrote:= >=20 > =EF=BB=BFOn 07/11/2024 02:43, George Neville-Neil wrote: >> Howdy, >> We've been digging into an interesting possible issue in the FreeBSD NFS c= lient. Here is the scenario. I have a FreeBSD VM on my Mac, the Mac is the N= FS server, the VM is the client. What are you using to run the vm ? What architecture is the vm ? What about t= he Mac ?=20 >> I then attempt to build an out of tree kernel module that I'm working on.= The build looks like it's hanging for 1.5 seconds, and when we look at the p= ackets (pcap file attached) we see a ton of GETATTRs over the first 1.5 seco= nds. I've put the pcap up here: oct_8_2024.pcapng <https:// people.freebsd.o= rg/~gnn/oct_8_2024.pcapng> >> I also note that an issue was raised on the forums that seems similar, wa= y back between FreeBSD 10 and 11: >> https://forums.freebsd.org/threads/nfs-cache-misses-after-upgrading-to-11= -1- from-10-3.65491/ <https://forums.freebsd.org/threads/nfs-cache-misses-af= ter- upgrading-to-11-1-from-10-3.65491/> >> I'm seeing this on 15 currentish (last few months). >=20 > Could it be just make checking for stale targets? > I.e., stat-ing various files to check their timestamps. >=20 >=20 > -- > Andriy Gapon --- Mark Saad | nonesuch@longcount.org >=20
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