Kconfig: disable KTASK by default

hulk inclusion
category: bugfix
bugzilla: 46923
CVE: NA

----------------------------------------------

Enable KTASK in vfio, if the BAR size of some straight through
equipment device is too large, it will cause guest crash on booting.
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>
Reviewed-by: NXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>
Signed-off-by: NCheng Jian <cj.chengjian@huawei.com>

init/Kconfig

@@ -352,7 +352,7 @@ config AUDIT_TREE
 config KTASK
 	bool "Multithread CPU-intensive kernel work"
 	depends on SMP
-	default y
+	default n
 	help
 	  Parallelize CPU-intensive kernel work.  This feature is designed for
           big machines that can take advantage of their extra CPUs to speed up