Date: Sun, 11 Oct 2015 13:21:25 +0100 From: Steven Hartland <killing@multiplay.co.uk> To: freebsd-fs@freebsd.org Subject: Re: Zfs locking up process Message-ID: <561A5445.40603@multiplay.co.uk> In-Reply-To: <561A2A4B.4080704@ranner.eu> References: <CAFoaQoDdKHzASfgxY7ptHuqk=nCsxvpq4q3gr9_QsUK4Hkim9w@mail.gmail.com> <CAFoaQoCB5CmorF4wfabz7iBaqxzxxggdqJiqePUTqLCnFichWA@mail.gmail.com> <CAFoaQoAt--8pGh_vGVTfVWjEBJ5uRM0Tr6TS-czFbQ-eSHKvXg@mail.gmail.com> <CAFoaQoDVt5eJKTjcmGmR2fmQoL_WQV1ZebNUb_K9qLY4=cOi6A@mail.gmail.com> <561A2A4B.4080704@ranner.eu>
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On 11/10/2015 10:22, Michael Ranner wrote: > Am 07.10.15 um 17:11 schrieb Rajil Saraswat: >> Hello >> >> I have server running Freenas 9.3 with a few jails. The machine has two new >> disks setup in mirror. I have a dataset (/mnt/tank/media) which is shared >> in two jails. >> >> Unfortunately, sometimes when I do a ls in a jail in the shared directory I >> see that the process just hangs. >> >> Today in the jail I did an 'su' and process just hung. On the host if i do >> ls /mnt/tank/media it also hangs. >> >> The su process (pid 77477) is taking up 100% cpu in the jail. It seems that >> zfs is holding up the process. Any idea what could be wrong? >> >> > It is a known problem with ZFS and nullfs. I had no problems under > FreeBSD 8 witch such a setup, but since FreeBSD 9 it is very unstable to > mount_nullfs on ZFS. I experienced the same behaviour with Apache jails > and PHP, mostly PHP running with 100% CPU inside the jail. I'd have to disagree with this we have hundreds of machines on 10.1 which uses nullfs every day and we've never seen a lockup. Given that do you have more information about this e.g. PR? > So you cannot "share" the dataset between to jails without the risk of > hangs - its a problem inside the VFS. > > You should set the mountpoint via "zfs set" inside your jail. But you > can do this only for one jail. > > Regards > Michael > _______________________________________________ > freebsd-fs@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org"
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