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 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
