Date: Mon, 8 Dec 2014 15:38:29 +0100 From: Mark Schouten <mark@tuxis.nl> To: freebsd-fs@freebsd.org Subject: Mountd, why not use the '-S' flag by default Message-ID: <710130010-1872@kerio.tuxis.nl>
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--=-v/092G2AT9LgfiAD1CAy Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Hi, I'm using a FreeBSD nfs-server as storage for my Linux KVM-based VPS-platfo= rm. The images reside on the NFS-server. I'm been noticing errors in my VPS disks when running 'zfs set sharenfs=3DX= YZ', probably because of reloads of mountd. While trying to debug that, I ran acros this message in mountd(8): =C2=A0 =C2=A0 =C2=A0-S =C2=A0 =C2=A0 =C2=A0Tell mountd to suspend/resume ex= ecution of the nfsd threads when- =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0ever the exports list is be= ing reloaded. =C2=A0This avoids intermit- =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0tent access errors for clie= nts that do NFS RPCs while the exports =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0are being reloaded, but int= roduces a delay in RPC response while =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the reload is in progress. = =C2=A0If mountd crashes while an exports =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0load is in progress, mountd= must be restarted to get the nfsd =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0threads running again, if t= his option is used. I can't think of a reason why you wouldn't want to use -S by default.. An '= /etc/rc.d/mountd reload' without it causes even my running Bonnie on a norm= al NFS-share (not via a diskimage) to stop with 'input/output error'. Can s= omeone enlighten me with the drawbacks of using -S ? Met vriendelijke groeten, --=C2=A0 Kerio Operator in de Cloud? https://www.kerioindecloud.nl/ Mark Schouten | Tuxis Internet Engineering KvK:=C2=A061527076=C2=A0| http://www.tuxis.nl/ T: 0318 200208 | info@tuxis.nl= --=-v/092G2AT9LgfiAD1CAy Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Description: Electronic Signature S/MIME Content-Transfer-Encoding: base64 MIIRwQYJKoZIhvcNAQcCoIIRsjCCEa4CAQExCzAJBgUrDgMCGgUAMAsGCSqGSIb3DQEHAaCCDt4w ggUbMIIEA6ADAgECAhAsv+VdGX6YsSHI/WRu2j2JMA0GCSqGSIb3DQEBBQUAMIGTMQswCQYDVQQG EwJHQjEbMBkGA1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxmb3JkMRowGAYD VQQKExFDT01PRE8gQ0EgTGltaXRlZDE5MDcGA1UEAxMwQ09NT0RPIENsaWVudCBBdXRoZW50aWNh dGlvbiBhbmQgU2VjdXJlIEVtYWlsIENBMB4XDTE0MDcwMTAwMDAwMFoXDTE1MDcwMTIzNTk1OVow HjEcMBoGCSqGSIb3DQEJARYNbWFya0B0dXhpcy5ubDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCC AQoCggEBANHu3SxlMZOG5GA0/mqtRXR1QmWwhUXzmCIprI0IPtSBWSA31YBJ5qcmXRhLzaiTB3Fr 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