2012/6/7, Boaz Harrosh <bharrosh@xxxxxxxxxxx>: > On 06/07/2012 12:43 PM, Namjae Jeon wrote: > >> 2012/6/7, Boaz Harrosh <bharrosh@xxxxxxxxxxx>: >>> On 06/07/2012 10:47 AM, Namjae Jeon wrote: >>> >>>> Hi Bruce, Trond. >>>> >>>> As you know, Currently umount results in busy on NFS server although >>>> user tried to succeed to umount on NFS client. >>>> I suggest to add umount procedure to avoid umount busy issue. >>>> When calling umount on NFS client, The resources(exportfs entries >>>> cache) of mount point will be flushed on NFS server. and umount will >>>> be succeed without busy issue. >>>> >>>> how do you think about this suggestion ? >>>> >>> >>> >>> I second this request, what is needed so when all clients unmounted, >>> the system comes back to the sate it was before any clients have >>> mounted. i.e filesystems is not referenced and may unmount cleanly. >>> (This also happens with >= 4.0 clients only, so no excuses) >>> >>> This is a real problem for me, on Fedora machines. Because I export >>> iscsi devices which are network devices, and in the shutdown procedure >>> for some reason the "service nfs stop" of the server is much much to >>> late. the original umount of exofs (-o _netdev) fails because it's >>> held by NFSD, the iscsi devices go away regardless, and when nfsd >>> finally releases exofs, it gets deadlocked on some error handling. >>> OK I know I must fix the stuck-ness, but the problem will remain. >>> The FS will not unmount cleanly because it will only attempt >>> an unmount after its devices are gone. This will be solved if >>> nfsd would release its hold on the FS when all clients are gone. >>> >>> It was on my TODO to fix this for a long time, but I seem to be >>> too busy with more urgent matters. (What's the point of fixing the >>> shutdown if the steady state doesn't work yet) >>> >>> If someone has investigated the matter and knows what to do I would >>> appreciate any insights, and/or patches would be wonderful ;-) >> Hi Boaz. >> Oh.. You also are facing same problem. >> Actually I almost finish to imprement the patch about umount busy >> issue on NFS server. But I want to know Maintainer's opinion before >> posting. >> Thanks. > > > Please post it (maybe as RFC) I want to see it Okay, I will soon. > > Thanks > Boaz > >>> >>>> Thanks. >>>> >>> >>> <> >>> >>> Thanks >>> Boaz >>> >>> > > > -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
