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Date:      Fri, 26 Aug 2022 03:55:31 +0000
From:      Rick Macklem <rmacklem@uoguelph.ca>
To:        Ganbold Tsagaankhuu <ganbold@gmail.com>
Cc:        freebsd-stable <freebsd-stable@freebsd.org>
Subject:   Re: NFS issue - newnfs_request: Wrong session srvslot=1 slot=0, freeing free slot!!
Message-ID:  <YT4PR01MB97362592C844062ABCA85625DD759@YT4PR01MB9736.CANPRD01.PROD.OUTLOOK.COM>
In-Reply-To: <CAGtf9xM6NHZuBEiEnYC%2BFDNqy6gPkUDkt=Ei7O_ymQV5SZEfgA@mail.gmail.com>
References:  <CAGtf9xNNCQLsWSN%2BspZmE8cQJ6UDTcdNcURbZxGdEo4-qZxn1A@mail.gmail.com> <YT4PR01MB9736383BF3B6F85D90115BA2DD759@YT4PR01MB9736.CANPRD01.PROD.OUTLOOK.COM> <CAGtf9xM6NHZuBEiEnYC%2BFDNqy6gPkUDkt=Ei7O_ymQV5SZEfgA@mail.gmail.com>

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Ganbold Tsagaankhuu <ganbold@gmail.com> wrote:=0A=
> Rick,=0A=
> =0A=
> On Fri, Aug 26, 2022 at 11:18 AM Rick Macklem > ><rmacklem@uoguelph.ca<ma=
ilto:rmacklem@uoguelph.ca>> wrote:=0A=
Ganbold Tsagaankhuu <ganbold@gmail.com<mailto: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=
 slot=3D0=0A=
[stuff snipped]=0A=
> > Aug 26 02:22:46 iron2 kernel: newnfs_request: Wrong session srvslot=3D1=
 slot=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: Fr=
i 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=
> Is this patch for NFS server? We are using Netapp NFS server on server si=
de.=0A=
No, it is for the client. However, as far as I know, a Netapp Filer never=
=0A=
generates a NFSERR_BADSESSION error (except maybe if you were using=0A=
a post-July 10. 2022 client), so the patch probably doesn't affect you.=0A=
(Get rid of "soft" and you should be happy.)=0A=
=0A=
rick=0A=
=0A=
thanks,=0A=
=0A=
Ganbold=0A=
=0A=
=0A=
=0A=
thanks a lot,=0A=
=0A=
Ganbold=0A=
=0A=



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