I/O Wait on exportfs

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Hi,

For a specific case I have /etc/exports with 1281 entries as I need
mount --bind to be exported to NFS Clients too.

Since I have ~1100 entries, reexporting /etc/exports have some bad
effects to connected clients, load rise to ~500 for 4/5 minutes, this is
always reproducible.

This was using 'exportfs -ra'. I did try with 'exportfs
192.168.0.1:/srv/mail/1234' to avoid reexport every directories, and
the sync process but the result is the same.

/etc/exports options look like :

/srv/mail      192.168.0.0/24(rw,async,no_wdelay,secure,no_root_squash,insecure_locks,no_subtree_check,nohide,crossmnt)
/srv/mail/1234 192.168.0.0/24(rw,async,no_wdelay,no_root_squash,insecure_locks,no_subtree_check,nohide,crossmnt)

NFS is mounted like this on client :

 192.168.0.1:/srv/mail on /var/mail type nfs (rw,nosuid,sync,remount,noatime,nodiratime,nfsvers=3,rsize=8192,wsize=8192,hard,intr,proto=udp,nolock,actimeo=3)

Server versions:
 Kernel: 2.6.32-bpo.5-amd64 (debian)
 nfs-utils: 1.1.2

Client versions:
 Kernel: 2.6.26-2-amd64 (debian)
 nfs-utils: 1.1.2

Am I in a huge case not really intended or a configuration mistake ?

Thanks,
Bertrand

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