Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / threads.h

diff --git a/kernel/include/linux/threads.h b/kernel/include/linux/threads.h
new file mode 100644 (file)
index 0000000..383ab95
--- /dev/null
+++ b/kernel/include/linux/threads.h
@@ -0,0 +1,45 @@
+#ifndef _LINUX_THREADS_H
+#define _LINUX_THREADS_H
+
+
+/*
+ * The default limit for the nr of threads is now in
+ * /proc/sys/kernel/threads-max.
+ */
+
+/*
+ * Maximum supported processors.  Setting this smaller saves quite a
+ * bit of memory.  Use nr_cpu_ids instead of this except for static bitmaps.
+ */
+#ifndef CONFIG_NR_CPUS
+/* FIXME: This should be fixed in the arch's Kconfig */
+#define CONFIG_NR_CPUS 1
+#endif
+
+/* Places which use this should consider cpumask_var_t. */
+#define NR_CPUS                CONFIG_NR_CPUS
+
+#define MIN_THREADS_LEFT_FOR_ROOT 4
+
+/*
+ * This controls the default maximum pid allocated to a process
+ */
+#define PID_MAX_DEFAULT (CONFIG_BASE_SMALL ? 0x1000 : 0x8000)
+
+/*
+ * A maximum of 4 million PIDs should be enough for a while.
+ * [NOTE: PID/TIDs are limited to 2^29 ~= 500+ million, see futex.h.]
+ */
+#define PID_MAX_LIMIT (CONFIG_BASE_SMALL ? PAGE_SIZE * 8 : \
+       (sizeof(long) > 4 ? 4 * 1024 * 1024 : PID_MAX_DEFAULT))
+
+/*
+ * Define a minimum number of pids per cpu.  Heuristically based
+ * on original pid max of 32k for 32 cpus.  Also, increase the
+ * minimum settable value for pid_max on the running system based
+ * on similar defaults.  See kernel/pid.c:pidmap_init() for details.
+ */
+#define PIDS_PER_CPU_DEFAULT   1024
+#define PIDS_PER_CPU_MIN       8
+
+#endif