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-rw-r--r--init/Kconfig11
-rw-r--r--init/calibrate.c15
-rw-r--r--init/do_mounts.c45
-rw-r--r--init/initramfs.c8
-rw-r--r--init/main.c5
5 files changed, 67 insertions, 17 deletions
diff --git a/init/Kconfig b/init/Kconfig
index a34cd174b76..018d206c21f 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -689,6 +689,17 @@ config CGROUP_MEM_RES_CTLR_SWAP_ENABLED
For those who want to have the feature enabled by default should
select this option (if, for some reason, they need to disable it
then swapaccount=0 does the trick).
+config CGROUP_MEM_RES_CTLR_KMEM
+ bool "Memory Resource Controller Kernel Memory accounting (EXPERIMENTAL)"
+ depends on CGROUP_MEM_RES_CTLR && EXPERIMENTAL
+ default n
+ help
+ The Kernel Memory extension for Memory Resource Controller can limit
+ the amount of memory used by kernel objects in the system. Those are
+ fundamentally different from the entities handled by the standard
+ Memory Controller, which are page-based, and can be swapped. Users of
+ the kmem extension can use it to guarantee that no group of processes
+ will ever exhaust kernel resources alone.
config CGROUP_PERF
bool "Enable perf_event per-cpu per-container group (cgroup) monitoring"
diff --git a/init/calibrate.c b/init/calibrate.c
index 24df7976816..5f117ca9e06 100644
--- a/init/calibrate.c
+++ b/init/calibrate.c
@@ -246,6 +246,19 @@ recalibrate:
static DEFINE_PER_CPU(unsigned long, cpu_loops_per_jiffy) = { 0 };
+/*
+ * Check if cpu calibration delay is already known. For example,
+ * some processors with multi-core sockets may have all cores
+ * with the same calibration delay.
+ *
+ * Architectures should override this function if a faster calibration
+ * method is available.
+ */
+unsigned long __attribute__((weak)) __cpuinit calibrate_delay_is_known(void)
+{
+ return 0;
+}
+
void __cpuinit calibrate_delay(void)
{
unsigned long lpj;
@@ -265,6 +278,8 @@ void __cpuinit calibrate_delay(void)
lpj = lpj_fine;
pr_info("Calibrating delay loop (skipped), "
"value calculated using timer frequency.. ");
+ } else if ((lpj = calibrate_delay_is_known())) {
+ ;
} else if ((lpj = calibrate_delay_direct()) != 0) {
if (!printed)
pr_info("Calibrating delay using timer "
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 0f6e1d985a3..2974c8b3b35 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -325,17 +325,19 @@ static void __init get_fs_names(char *page)
static int __init do_mount_root(char *name, char *fs, int flags, void *data)
{
+ struct super_block *s;
int err = sys_mount(name, "/root", fs, flags, data);
if (err)
return err;
sys_chdir((const char __user __force *)"/root");
- ROOT_DEV = current->fs->pwd.mnt->mnt_sb->s_dev;
+ s = current->fs->pwd.dentry->d_sb;
+ ROOT_DEV = s->s_dev;
printk(KERN_INFO
"VFS: Mounted root (%s filesystem)%s on device %u:%u.\n",
- current->fs->pwd.mnt->mnt_sb->s_type->name,
- current->fs->pwd.mnt->mnt_sb->s_flags & MS_RDONLY ?
- " readonly" : "", MAJOR(ROOT_DEV), MINOR(ROOT_DEV));
+ s->s_type->name,
+ s->s_flags & MS_RDONLY ? " readonly" : "",
+ MAJOR(ROOT_DEV), MINOR(ROOT_DEV));
return 0;
}
@@ -398,15 +400,42 @@ out:
}
#ifdef CONFIG_ROOT_NFS
+
+#define NFSROOT_TIMEOUT_MIN 5
+#define NFSROOT_TIMEOUT_MAX 30
+#define NFSROOT_RETRY_MAX 5
+
static int __init mount_nfs_root(void)
{
char *root_dev, *root_data;
+ unsigned int timeout;
+ int try, err;
- if (nfs_root_data(&root_dev, &root_data) != 0)
- return 0;
- if (do_mount_root(root_dev, "nfs", root_mountflags, root_data) != 0)
+ err = nfs_root_data(&root_dev, &root_data);
+ if (err != 0)
return 0;
- return 1;
+
+ /*
+ * The server or network may not be ready, so try several
+ * times. Stop after a few tries in case the client wants
+ * to fall back to other boot methods.
+ */
+ timeout = NFSROOT_TIMEOUT_MIN;
+ for (try = 1; ; try++) {
+ err = do_mount_root(root_dev, "nfs",
+ root_mountflags, root_data);
+ if (err == 0)
+ return 1;
+ if (try > NFSROOT_RETRY_MAX)
+ break;
+
+ /* Wait, in case the server refused us immediately */
+ ssleep(timeout);
+ timeout <<= 1;
+ if (timeout > NFSROOT_TIMEOUT_MAX)
+ timeout = NFSROOT_TIMEOUT_MAX;
+ }
+ return 0;
}
#endif
diff --git a/init/initramfs.c b/init/initramfs.c
index 2531811d42c..8216c303b08 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -22,7 +22,7 @@ static void __init error(char *x)
static __initdata struct hash {
int ino, minor, major;
- mode_t mode;
+ umode_t mode;
struct hash *next;
char name[N_ALIGN(PATH_MAX)];
} *head[32];
@@ -35,7 +35,7 @@ static inline int hash(int major, int minor, int ino)
}
static char __init *find_link(int major, int minor, int ino,
- mode_t mode, char *name)
+ umode_t mode, char *name)
{
struct hash **p, *q;
for (p = head + hash(major, minor, ino); *p; p = &(*p)->next) {
@@ -120,7 +120,7 @@ static __initdata time_t mtime;
/* cpio header parsing */
static __initdata unsigned long ino, major, minor, nlink;
-static __initdata mode_t mode;
+static __initdata umode_t mode;
static __initdata unsigned long body_len, name_len;
static __initdata uid_t uid;
static __initdata gid_t gid;
@@ -276,7 +276,7 @@ static int __init maybe_link(void)
return 0;
}
-static void __init clean_path(char *path, mode_t mode)
+static void __init clean_path(char *path, umode_t mode)
{
struct stat st;
diff --git a/init/main.c b/init/main.c
index 2c76efb513c..415548e808d 100644
--- a/init/main.c
+++ b/init/main.c
@@ -282,10 +282,6 @@ static int __init unknown_bootoption(char *param, char *val)
return 0;
}
-#ifdef CONFIG_DEBUG_PAGEALLOC
-int __read_mostly debug_pagealloc_enabled = 0;
-#endif
-
static int __init init_setup(char *str)
{
unsigned int i;
@@ -596,7 +592,6 @@ asmlinkage void __init start_kernel(void)
}
#endif
page_cgroup_init();
- enable_debug_pagealloc();
debug_objects_mem_init();
kmemleak_init();
setup_per_cpu_pageset();