From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8BA3827144A for ; Tue, 27 May 2025 13:50:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748353815; cv=none; b=BZgOCB5Ekrx7WAVDkCwI8j6rEb2FdzpkWL8Z18eQAeiHDwC3xsIj3PYN9jM9NXab8rmuMWLOoURqYaB6QyvXg8X1GfDrLwjScR5XVgJsIPxcaz/Qb14sBq/1TNc1qyyAZWFiY35BxCszWOJK3pfT7tBUXyunORXwooDv4fjrUEA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748353815; c=relaxed/simple; bh=MoTLkea0XKDWmA2drCckQiB2fWdKv+4YvT/MAz61Xjg=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=d3we32i7XgMO5w/jKGIuPJN0WdchTde1Jy1bmZvsbWTXxa17zseDrm6iiA/VqikVW1dmGQfH7bdtKFGRyFri0lyoLK4wx2qAYu0y/I2uEBnzLFdwMuSmm6SGFJOhRsQ1Kp50yo+SU0Lz7tE5FRzHxGUSpISWBDKzWb0HzBssmYU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=t1mS5FEg; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="t1mS5FEg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7F64EC4CEE9; Tue, 27 May 2025 13:50:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1748353815; bh=MoTLkea0XKDWmA2drCckQiB2fWdKv+4YvT/MAz61Xjg=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=t1mS5FEgjQZw64BthcAGa3e+iwcqZSocsywUSvQ28aHWdce8g3oDV+5znBL2ZAZ0Q vXvCcvm53dgKgdxTQfSgFmCtJ4t6SZPctqL7s4pUBdYnrPKEXLEK8As1Cx6VNOHZWH +dJfyzJVNyHiaT3HA9FnHJ9GQ9MVA5WBdwBhQh7/9LPr8hO313BAc0nIAJG02v4kay EOvTba4ngXgRLXQdtryzzAJut8otbLTiY4kdvIcrfUvdcsAWQTkAaEI2AyKO3ymR7A j6FDDyG/yv1wlY9Dxy+NEC644D6/WGo1BRbSao4aDZmeTuI3kC8oIx9F+07RH+M7Da 7qYKFlW92WePg== Message-ID: <0a6ebf149045d2d7c5379e1187d7b44ee297457b.camel@kernel.org> Subject: Re: unable to run NFSD in container if "options sunrpc pool_mode=pernode" From: Jeff Layton To: Mike Snitzer Cc: steved@redhat.com, Chuck Lever , NeilBrown , linux-nfs@vger.kernel.org Date: Tue, 27 May 2025 09:50:13 -0400 In-Reply-To: References: <6bb9e9cce27e2a222bf55e272d690aab8f0eef13.camel@kernel.org> <73c6caaa51804da9ae850ee65b6ab51640706d74.camel@kernel.org> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; keydata=mQINBE6V0TwBEADXhJg7s8wFDwBMEvn0qyhAnzFLTOCHooMZyx7XO7dAiIhDSi7G1NPxw n8jdFUQMCR/GlpozMFlSFiZXiObE7sef9rTtM68ukUyZM4pJ9l0KjQNgDJ6Fr342Htkjxu/kFV1Wv egyjnSsFt7EGoDjdKqr1TS9syJYFjagYtvWk/UfHlW09X+jOh4vYtfX7iYSx/NfqV3W1D7EDi0PqV T2h6v8i8YqsATFPwO4nuiTmL6I40ZofxVd+9wdRI4Db8yUNA4ZSP2nqLcLtFjClYRBoJvRWvsv4lm 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08:05:19AM -0400, Jeff Layton wrote: > > On Fri, 2025-05-23 at 23:53 -0400, Mike Snitzer wrote: > > > On Fri, May 23, 2025 at 07:09:27PM -0400, Mike Snitzer wrote: > > > > On Fri, May 23, 2025 at 06:40:45PM -0400, Jeff Layton wrote: > > > > > On Fri, 2025-05-23 at 18:19 -0400, Mike Snitzer wrote: > > > > > > On Fri, May 23, 2025 at 02:40:17PM -0400, Jeff Layton wrote: > > > > > > > On Fri, 2025-05-23 at 14:29 -0400, Mike Snitzer wrote: > > > > > > > > I don't know if $SUBJECT ever worked... but with latest 6.1= 5 or > > > > > > > > nfsd-testing if I just use pool_mode=3Dglobal then all is f= ine. > > > > > > > >=20 > > > > > > > > If pool_mode=3Dpernode then mounting the container's NFSv3 = export fails. > > > > > > > >=20 > > > > > > > > I haven't started to dig into code yet but pool_mode=3Dpern= ode works > > > > > > > > perfectly fine if NFSD isn't running in a container. > > > > > > > >=20 > > > > >=20 > > > > > Oops, I went and looked and nfsd isn't running in a container on = these > > > > > boxes. There are some other containerized apps running on the box= , but > > > > > nfsd isn't running in a container. > > > >=20 > > > > OK. > > > >=20 > > > > > > I'm using nfs-utils-2.8.2. I don't see any nfsd threads runnin= g if I > > > > > > use "options sunrpc pool_mode=3Dpernode". > > > > > >=20 > > > > >=20 > > > > > I'll have a look soon, but if you figure it out in the meantime, = let us > > > > > know. > > > >=20 > > > > Will do. > > > >=20 > > > > Just the latest info I have, with sunrpc's pool_mode=3Dpernode dd h= angs > > > > with this stack trace: > > >=20 > > > Turns out this pool_mode=3Dpernode issue is a regression caused by th= e > > > very recent nfs-utils 2.8.2 (I rebuilt EL10's nfs-utils package, > > > because why not upgrade to the latest!?). > > >=20 > > > If I use EL9.5's latest nfs-utils-2.5.4-37.el8.x86_64 then sunrpc's > > > pool_mode=3Dpernode works fine. > > >=20 > > > And this issue doesn't have anything to do with running in a containe= r > > > (it seemed to be container related purely because I happened to be > > > seeing the issue with an EL9.5 container that had the EL10-based > > > nfs-utils 2.8.2 installed). > > >=20 > > > Steved, unfortunately I'm not sure what the problem is with the newer > > > nfs-utils and setting "options sunrpc pool_mode=3Dpernode" > > >=20 > >=20 > > I tried to reproduce this using fedora-41 VMs (no f42 available for > > virt-builder yet), but everything worked. I don't have any actual NUMA > > hw here though, so maybe that matters? > >=20 > > Can you run this on the nfs server and send back the output? I'm > > wondering if this setting might not track the module option properly on > > that host for some reason: > >=20 > > # nfsdctl pool-mode >=20 > (from EL9.5 container with nfs-utils 2.8.2) > # nfsdctl pool-mode > pool-mode: pernode > npools: 2 >=20 > (on host) > # numactl -H > available: 2 nodes (0-1) > node 0 cpus: 0 1 2 3 4 5 6 7 > node 0 size: 11665 MB > node 0 free: 9892 MB > node 1 cpus: 8 9 10 11 12 13 14 15 > node 1 size: 6042 MB > node 1 free: 5127 MB > node distances: > node 0 1 > 0: 10 20 > 1: 20 10 >=20 > (and yeahh I was aware the newer nfs-utils uses the netlink interface, > will be interesting to pin down what the issue is with > pool-mode=3Dpernode) Ok, I can reproduce this on a true NUMA machine. The first thing that's interesting is that it seems to be intermittent. Occasionally I can mount and operate on the socket, but socket requests hang most of the time. I turned up all of the nfsd and sunrpc tracepoints. After attempting a mount that hung, I see only a single tracepoint fire: -0 [038] ..s.. 5942.572721: svc_xprt_enqueue: server= =3D[::]:2049 client=3D(einval) flags=3DCONN|CHNGBUF|LISTENER|CACHE_AUTH|CON= G_CTRL Based on the flags, svc_xprt_ready should have returned true. That should make the xprt be enqueued and an idle thread be awoken. It looks like that last bit may not be happening for some reason. At this point, I'll probably have to add some debugging. I'll keep poking at it -- stay tuned. --=20 Jeff Layton