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Thu, 17 Feb 2022 08:02:20 +0000 Received: by kubenode500.mail-prod1.omega.bf1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 329a4f42450bc5cce24e70f83c907a66; Thu, 17 Feb 2022 08:02:17 +0000 (UTC) Content-Type: text/plain; charset=us-ascii List-Id: Porting FreeBSD to ARM processors List-Archive: https://lists.freebsd.org/archives/freebsd-arm List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-arm@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.120.0.1.13\)) Subject: Re: Erratic ping behavior, was Re: Pi3 answers ssh only if outbound ping is running on -current From: Mark Millard In-Reply-To: <20220216231826.GA54961@www.zefox.net> Date: Thu, 17 Feb 2022 00:02:15 -0800 Cc: freebsd-net@freebsd.org, Free BSD Content-Transfer-Encoding: quoted-printable Message-Id: <64138E81-2415-4D4A-A31A-D901DC53EB01@yahoo.com> References: <20220212185618.GA37391@www.zefox.net> <34F5C092-7C35-4CBB-9CC3-99E373D1F785@yahoo.com> <20220215034924.GA46139@www.zefox.net> <8F9A6C9A-69BF-4D42-9886-A3F08BCB2EA0@yahoo.com> <506CD1A7-3D34-4E1B-AEAA-A1A819C6CC73@yahoo.com> <20220216231826.GA54961@www.zefox.net> To: bob prohaska X-Mailer: Apple Mail (2.3654.120.0.1.13) X-Rspamd-Queue-Id: 4JznNs6cgmz3kL8 X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; 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MLMMJ_DEST(0.00)[freebsd-arm]; RWL_MAILSPIKE_POSSIBLE(0.00)[98.137.64.82:from]; RCVD_COUNT_TWO(0.00)[2] X-ThisMailContainsUnwantedMimeParts: N On 2022-Feb-16, at 15:18, bob prohaska wrote: > [changed subject to more clearly reflect the symptoms] >=20 > On Mon, Feb 14, 2022 at 09:59:23PM -0800, Mark Millard wrote: >>>>>> Since I have a context working based on the kernel in: >>>>>>=20 >>>>>> = https://artifact.ci.freebsd.org/snapshot/stable-13/371633ece3ae88e3b3d7a02= 8c372d4ac4f72b503/arm64/aarch64/kernel.txz >>>>>>=20 >>>>>> I recommend that you try that exact same kernel in your >>>>>> stable/13 context. I recommend renaming the existing >>>>>> /boot/kernel before expanding the kernel.txz into / and >>>>>> so causing a new /boot/kernel/ to be filled in. >>=20 >=20 > It looks like the kernel isn't an obvious culprit: Versions > from late October to a few days ago all behave the same way. >=20 > Even when booted single-user, with the ue0 device brought up > by hand, only about 1% of incoming pings are answered. That > figure rises to a little over 50% when there's an outgoing ping > process (both running a 1/seccond). Destination of the ping > does not seem to matter, an unused IP seems to work fine.=20 >=20 > AIUI, nothing of userland apart from a shell and the ping > process will be running under those circumstances. Is this > correct?=20 >=20 > Might the trouble be inherited from the boot files? I've left > them alone since the machine does boot and updating them=20 > isn't automated. Right now the machine boots from microSD > and then runs bootcmd_usb0. >=20 > One oddity noticed during the kernel-swapping experiments > is that at the loader prompt some kernel names don't seem > to be recognized. If I type kernel or kernel.old it's > loaded immediately. If I type kernel.no-bpf which is one > I built, booted using the name kernel and then saved with > the name kernel.no-bpf it can't be found, even though it's > visible via ls at the OK prompt. Might - be a prohibited > or priviledged character to the loader? Names like > kernel.20220214 are likewise not recognized, even though > they're visible using ls. >=20 > For lack of immediately better ideas I've started stress2 > running in single-user mode to see if anything of interest > results. I expect that this was your first message on the issue to freebsd-net. So I'll reference your previous notes on the behaviors that you are seeing that you sent to freebsd-arm at the time: https://lists.freebsd.org/archives/freebsd-arm/2022-February/000989.html https://lists.freebsd.org/archives/freebsd-arm/2022-February/001002.html This might avoid some Q&A. =3D=3D=3D Mark Millard marklmi at yahoo.com