Date: Wed, 25 Aug 2021 03:52:46 -1000 From: "parv/freebsd" <parv.0zero9+freebsd@gmail.com> To: freebsd-questions@freebsd.org Subject: Re: NFS v3 - FreeBSD 12 server connection getting timed out on CentOS 8 client Message-ID: <CABObuOrhtwPuJeFQmqa-YWrejRqpm8qGpkj9XXuTLXM3mbAcDQ@mail.gmail.com> In-Reply-To: <CABObuOpqxqT8N0qLZjoSfrbLVJgw2Oj315_vXjbhoPOTS2Ov%2BA@mail.gmail.com> References: <CABObuOr5rLSoUhm8LsWr6hQZVmpBGrYvJE%2BnruV1kmB8W-9XnQ@mail.gmail.com> <CABObuOpqxqT8N0qLZjoSfrbLVJgw2Oj315_vXjbhoPOTS2Ov%2BA@mail.gmail.com>
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On Tue, Aug 24, 2021 at 2:20 PM parv/freebsd wrote: Hi me, On Sun, Aug 22, 2021 at 8:05 PM parv/freebsd wrote: > > (I have rearranged my quoted email) > > [CentOS 8 NFS v3 client sometimes prints ...] > >> Aug 21 08:31:04 [CLIENT] kernel: watchdog: BUG: soft lockup - CPU#0 stuck >> for 22s! [kworker/u24:0:672075] >> >> Aug 21 08:31:04 [CLIENT] kernel: watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [kworker/u24:10:672632] >> >> ... > How do I go about investigating or solve this? > > ... > I have collected tcpdump output on both server & client ... > > https://github.com/parv/centos8-nfs3-issue/ > ... While trying to find if there is an update for CentOS 8 "nfs-utils" package, I came upon the thread on "linux-nfs" mailing list ... CPU lockup in or near new filecache code, 201912, https://marc.info/?l=linux-nfs&m=157599524312895&w=2 ; a patch, 201912, https://marc.info/?l=linux-nfs&m=157609449120027&w=2 ; more to come, 202001 https://marc.info/?l=linux-nfs&m=157807452103938&w=2 ? Now the question is will the fix be available on CentOS 8 anytime soon, as above thread was concerned with, AIUI, kernel 5.5 (CentOS 8 kernel is hovering around 4.18)? Not a FreeBSD issue anymore, however, seems like. - parv
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