Date: Fri, 26 Aug 2022 03:18:15 +0000 From: Rick Macklem <rmacklem@uoguelph.ca> To: Ganbold Tsagaankhuu <ganbold@gmail.com>, freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: NFS issue - newnfs_request: Wrong session srvslot=1 slot=0, freeing free slot!! Message-ID: <YT4PR01MB9736383BF3B6F85D90115BA2DD759@YT4PR01MB9736.CANPRD01.PROD.OUTLOOK.COM> In-Reply-To: <CAGtf9xNNCQLsWSN%2BspZmE8cQJ6UDTcdNcURbZxGdEo4-qZxn1A@mail.gmail.com> References: <CAGtf9xNNCQLsWSN%2BspZmE8cQJ6UDTcdNcURbZxGdEo4-qZxn1A@mail.gmail.com>
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Ganbold Tsagaankhuu <ganbold@gmail.com> wrote:=0A=
> Hi,=0A=
> =0A=
> We are having trouble with NFS running on STABLE:=0A=
> =0A=
> Aug 26 02:21:42 iron2 kernel: newnfs_request: Wrong session srvslot=3D1 s=
lot=3D0=0A=
> Aug 26 02:21:42 iron2 kernel: freeing free slot!!=0A=
> Aug 26 02:21:43 iron2 kernel: newnfs_request: Wrong session srvslot=3D1 s=
lot=3D0=0A=
> Aug 26 02:21:43 iron2 kernel: freeing free slot!!=0A=
> Aug 26 02:21:54 iron2 kernel: newnfs_request: Wrong session srvslot=3D1 s=
lot=3D0=0A=
> Aug 26 02:21:54 iron2 kernel: freeing free slot!!=0A=
> Aug 26 02:21:58 iron2 kernel: newnfs_request: Wrong session srvslot=3D1 s=
lot=3D2=0A=
> Aug 26 02:21:58 iron2 kernel: retseq diff 0x1=0A=
> Aug 26 02:21:58 iron2 kernel: freeing free slot!!=0A=
> Aug 26 02:21:59 iron2 kernel: newnfs_request: Wrong session srvslot=3D1 s=
lot=3D2=0A=
> Aug 26 02:21:59 iron2 kernel: retseq diff 0x1=0A=
> Aug 26 02:21:59 iron2 kernel: freeing free slot!!=0A=
> Aug 26 02:22:12 iron2 kernel: newnfs_request: Wrong session srvslot=3D0 s=
lot=3D2=0A=
> Aug 26 02:22:12 iron2 kernel: retseq diff 0x1=0A=
> Aug 26 02:22:12 iron2 kernel: freeing free slot!!=0A=
> Aug 26 02:22:14 iron2 kernel: newnfs_request: Wrong session srvslot=3D1 s=
lot=3D0=0A=
> Aug 26 02:22:14 iron2 kernel: freeing free slot!!=0A=
> Aug 26 02:22:15 iron2 kernel: newnfs_request: Bad session slot=3D1=0A=
> Aug 26 02:22:15 iron2 kernel: freeing free slot!!=0A=
> Aug 26 02:22:30 iron2 kernel: newnfs_request: Wrong session srvslot=3D1 s=
lot=3D2=0A=
> Aug 26 02:22:30 iron2 kernel: retseq diff 0x1=0A=
> Aug 26 02:22:30 iron2 kernel: freeing free slot!!=0A=
> Aug 26 02:22:31 iron2 kernel: newnfs_request: Bad session slot=3D1=0A=
> Aug 26 02:22:31 iron2 kernel: freeing free slot!!=0A=
> Aug 26 02:22:46 iron2 kernel: newnfs_request: Wrong session srvslot=3D1 s=
lot=3D0=0A=
> Aug 26 02:22:46 iron2 kernel: freeing free slot!!=0A=
> =0A=
> We are running FreeBSD 13.1-STABLE #3 stable/13-n252198-c1434fd2dea: Fri =
Aug 26 01:51:53 UTC 2022 and mount options are:=0A=
> =0A=
> rw,nfsv4,minorversion=3D1,bg,soft,timeo=3D20,retrans=3D5,retrycnt=3D5=0A=
> ro,nfsv4,minorversion=3D1,bg,soft,timeo=3D20,retrans=3D5,retrycnt=3D5=0A=
> =0A=
> Is there any fix for this issue?=0A=
- Don't use "soft" mounts. See the Bugs section of "man mount_nfs".=0A=
There are patches in stable/13 dated July 10, 2022. (I have no idea=0A=
how to tell if n252198 would have them) that help, but use of "soft"=0A=
mounts will never work correctly for NFSv4.=0A=
- The attached small patch (not committed yet, but should be in=0A=
stable/13 in about 10days) fixes a couple of corner cases. If you=0A=
are using a FreeBSD NFS server, I believe these corner cases only=0A=
occur after the NFS server reboots.=0A=
=0A=
rick=0A=
ps: If you test the attached patch, please let me know how it goes.=0A=
=0A=
thanks a lot,=0A=
=0A=
Ganbold=0A=
=0A=
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