[DOC] Add boot option vcpu_migration_delay in user.tex

Signed-off-by: Atsushi SAKAI <sakaia@jp.fujitsu.com>

diff --git a/docs/src/user.tex b/docs/src/user.tex
index c4a8171970f4923706c18cd9870c44ce9e500919..69971cdd66fa43d1e8c150f43394f7618beccf4d 100644 (file)
--- a/docs/src/user.tex
+++ b/docs/src/user.tex
@@ -4194,6 +4194,9 @@ writing to the VGA console after domain 0 starts booting (e.g., `vga=text-80x50,
 \item [ dma\_bits=xxx ] Specify width of DMA addresses in bits. This
   is used in NUMA systems to prevent this special DMA memory from
   being exhausted in one node when remote nodes have available memory.
+\item [ vcpu\_migration\_delay=$<$minimum\_time$>$] Set minimum time of 
+  vcpu migration in microseconds (default 0). This parameter avoids agressive
+  vcpu migration. For example, the linux kernel uses 0.5ms by default.
 \end{description}
 
 In addition, the following options may be specified on the Xen command