For historical reasons zfs_mknode() was written such that it could
never fail. This poses a problem for Linux since zfs_znode_alloc()
could potentually failure due to low memory. Handle this gracefully
by retrying zfs_znode_alloc() until it succeeds, direct reclaim
will eventually be able to allocate memory.
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: loli10K <ezomori.nozomu@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#5535Closes#5908
8d70398740