K 10
svn:author
V 8
rmacklem
K 8
svn:date
V 27
2017-10-16T23:28:12.232946Z
K 7
svn:log
V 543
Use taskqueue(9) to do writes/commits to mirrored DSs concurrently.

When the NFSv4.1 pNFS client is using a Flexible File Layout specifying
mirrored Data Servers, it must do the writes and commits to all mirrors.
This patch modifies the client to use a taskqueue to perform these writes
and commits concurrently.
The number of threads can't be changed for taskqueue(9), so it is set
to 4 * mp_ncpus by default, but this can be overridden by setting the
sysctl vfs.nfs.pnfsiothreads.

Differential Revision:	https://reviews.freebsd.org/D12632

END