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Diffstat (limited to 'kernel')
-rw-r--r--kernel/dma/pool.c4
-rw-r--r--kernel/fork.c3
-rw-r--r--kernel/kthread.c1
-rw-r--r--kernel/rcu/rcutorture.c7
-rw-r--r--kernel/sys.c63
-rw-r--r--kernel/sys_ni.c1
-rw-r--r--kernel/sysctl.c3
-rw-r--r--kernel/trace/ring_buffer.c7
-rw-r--r--kernel/trace/trace_hwlat.c6
-rw-r--r--kernel/trace/trace_osnoise.c3
10 files changed, 78 insertions, 20 deletions
diff --git a/kernel/dma/pool.c b/kernel/dma/pool.c
index 5f84e6cdb78e..4d40dcce7604 100644
--- a/kernel/dma/pool.c
+++ b/kernel/dma/pool.c
@@ -203,7 +203,7 @@ static int __init dma_atomic_pool_init(void)
GFP_KERNEL);
if (!atomic_pool_kernel)
ret = -ENOMEM;
- if (IS_ENABLED(CONFIG_ZONE_DMA)) {
+ if (has_managed_dma()) {
atomic_pool_dma = __dma_atomic_pool_init(atomic_pool_size,
GFP_KERNEL | GFP_DMA);
if (!atomic_pool_dma)
@@ -226,7 +226,7 @@ static inline struct gen_pool *dma_guess_pool(struct gen_pool *prev, gfp_t gfp)
if (prev == NULL) {
if (IS_ENABLED(CONFIG_ZONE_DMA32) && (gfp & GFP_DMA32))
return atomic_pool_dma32;
- if (IS_ENABLED(CONFIG_ZONE_DMA) && (gfp & GFP_DMA))
+ if (atomic_pool_dma && (gfp & GFP_DMA))
return atomic_pool_dma;
return atomic_pool_kernel;
}
diff --git a/kernel/fork.c b/kernel/fork.c
index 3161d7980155..1c989cc4208a 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -42,6 +42,7 @@
#include <linux/mmu_notifier.h>
#include <linux/fs.h>
#include <linux/mm.h>
+#include <linux/mm_inline.h>
#include <linux/vmacache.h>
#include <linux/nsproxy.h>
#include <linux/capability.h>
@@ -365,12 +366,14 @@ struct vm_area_struct *vm_area_dup(struct vm_area_struct *orig)
*new = data_race(*orig);
INIT_LIST_HEAD(&new->anon_vma_chain);
new->vm_next = new->vm_prev = NULL;
+ dup_vma_anon_name(orig, new);
}
return new;
}
void vm_area_free(struct vm_area_struct *vma)
{
+ free_vma_anon_name(vma);
kmem_cache_free(vm_area_cachep, vma);
}
diff --git a/kernel/kthread.c b/kernel/kthread.c
index 7113003fab63..4ed9e7bce9e8 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -523,6 +523,7 @@ struct task_struct *kthread_create_on_cpu(int (*threadfn)(void *data),
to_kthread(p)->cpu = cpu;
return p;
}
+EXPORT_SYMBOL(kthread_create_on_cpu);
void kthread_set_per_cpu(struct task_struct *k, int cpu)
{
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 33ea446101b3..422f7e4cc08d 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -2031,9 +2031,8 @@ static int rcutorture_booster_init(unsigned int cpu)
mutex_lock(&boost_mutex);
rcu_torture_disable_rt_throttle();
VERBOSE_TOROUT_STRING("Creating rcu_torture_boost task");
- boost_tasks[cpu] = kthread_create_on_node(rcu_torture_boost, NULL,
- cpu_to_node(cpu),
- "rcu_torture_boost");
+ boost_tasks[cpu] = kthread_run_on_cpu(rcu_torture_boost, NULL,
+ cpu, "rcu_torture_boost_%u");
if (IS_ERR(boost_tasks[cpu])) {
retval = PTR_ERR(boost_tasks[cpu]);
VERBOSE_TOROUT_STRING("rcu_torture_boost task create failed");
@@ -2042,8 +2041,6 @@ static int rcutorture_booster_init(unsigned int cpu)
mutex_unlock(&boost_mutex);
return retval;
}
- kthread_bind(boost_tasks[cpu], cpu);
- wake_up_process(boost_tasks[cpu]);
mutex_unlock(&boost_mutex);
return 0;
}
diff --git a/kernel/sys.c b/kernel/sys.c
index 8fdac0d90504..2450a9f33cb0 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -2261,6 +2261,66 @@ int __weak arch_prctl_spec_ctrl_set(struct task_struct *t, unsigned long which,
#define PR_IO_FLUSHER (PF_MEMALLOC_NOIO | PF_LOCAL_THROTTLE)
+#ifdef CONFIG_ANON_VMA_NAME
+
+#define ANON_VMA_NAME_MAX_LEN 80
+#define ANON_VMA_NAME_INVALID_CHARS "\\`$[]"
+
+static inline bool is_valid_name_char(char ch)
+{
+ /* printable ascii characters, excluding ANON_VMA_NAME_INVALID_CHARS */
+ return ch > 0x1f && ch < 0x7f &&
+ !strchr(ANON_VMA_NAME_INVALID_CHARS, ch);
+}
+
+static int prctl_set_vma(unsigned long opt, unsigned long addr,
+ unsigned long size, unsigned long arg)
+{
+ struct mm_struct *mm = current->mm;
+ const char __user *uname;
+ char *name, *pch;
+ int error;
+
+ switch (opt) {
+ case PR_SET_VMA_ANON_NAME:
+ uname = (const char __user *)arg;
+ if (uname) {
+ name = strndup_user(uname, ANON_VMA_NAME_MAX_LEN);
+
+ if (IS_ERR(name))
+ return PTR_ERR(name);
+
+ for (pch = name; *pch != '\0'; pch++) {
+ if (!is_valid_name_char(*pch)) {
+ kfree(name);
+ return -EINVAL;
+ }
+ }
+ } else {
+ /* Reset the name */
+ name = NULL;
+ }
+
+ mmap_write_lock(mm);
+ error = madvise_set_anon_name(mm, addr, size, name);
+ mmap_write_unlock(mm);
+ kfree(name);
+ break;
+ default:
+ error = -EINVAL;
+ }
+
+ return error;
+}
+
+#else /* CONFIG_ANON_VMA_NAME */
+static int prctl_set_vma(unsigned long opt, unsigned long start,
+ unsigned long size, unsigned long arg)
+{
+ return -EINVAL;
+}
+#endif /* CONFIG_ANON_VMA_NAME */
+
SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
unsigned long, arg4, unsigned long, arg5)
{
@@ -2530,6 +2590,9 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
error = sched_core_share_pid(arg2, arg3, arg4, arg5);
break;
#endif
+ case PR_SET_VMA:
+ error = prctl_set_vma(arg2, arg3, arg4, arg5);
+ break;
default:
error = -EINVAL;
break;
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index d1944258cfc0..a492f159624f 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -297,6 +297,7 @@ COND_SYSCALL(get_mempolicy);
COND_SYSCALL(set_mempolicy);
COND_SYSCALL(migrate_pages);
COND_SYSCALL(move_pages);
+COND_SYSCALL(set_mempolicy_home_node);
COND_SYSCALL(perf_event_open);
COND_SYSCALL(accept4);
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index d7ed1dffa426..ef77be575d87 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -123,6 +123,7 @@ static unsigned long long_max = LONG_MAX;
static int one_hundred = 100;
static int two_hundred = 200;
static int one_thousand = 1000;
+static int three_thousand = 3000;
#ifdef CONFIG_PRINTK
static int ten_thousand = 10000;
#endif
@@ -2960,7 +2961,7 @@ static struct ctl_table vm_table[] = {
.mode = 0644,
.proc_handler = watermark_scale_factor_sysctl_handler,
.extra1 = SYSCTL_ONE,
- .extra2 = &one_thousand,
+ .extra2 = &three_thousand,
},
{
.procname = "percpu_pagelist_high_fraction",
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 2699e9e562b1..05dfc7a12d3d 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -5898,16 +5898,13 @@ static __init int test_ringbuffer(void)
rb_data[cpu].buffer = buffer;
rb_data[cpu].cpu = cpu;
rb_data[cpu].cnt = cpu;
- rb_threads[cpu] = kthread_create(rb_test, &rb_data[cpu],
- "rbtester/%d", cpu);
+ rb_threads[cpu] = kthread_run_on_cpu(rb_test, &rb_data[cpu],
+ cpu, "rbtester/%u");
if (WARN_ON(IS_ERR(rb_threads[cpu]))) {
pr_cont("FAILED\n");
ret = PTR_ERR(rb_threads[cpu]);
goto out_free;
}
-
- kthread_bind(rb_threads[cpu], cpu);
- wake_up_process(rb_threads[cpu]);
}
/* Now create the rb hammer! */
diff --git a/kernel/trace/trace_hwlat.c b/kernel/trace/trace_hwlat.c
index 56bb7b890578..d440ddd5fd8b 100644
--- a/kernel/trace/trace_hwlat.c
+++ b/kernel/trace/trace_hwlat.c
@@ -491,18 +491,14 @@ static void stop_per_cpu_kthreads(void)
static int start_cpu_kthread(unsigned int cpu)
{
struct task_struct *kthread;
- char comm[24];
- snprintf(comm, 24, "hwlatd/%d", cpu);
-
- kthread = kthread_create_on_cpu(kthread_fn, NULL, cpu, comm);
+ kthread = kthread_run_on_cpu(kthread_fn, NULL, cpu, "hwlatd/%u");
if (IS_ERR(kthread)) {
pr_err(BANNER "could not start sampling thread\n");
return -ENOMEM;
}
per_cpu(hwlat_per_cpu_data, cpu).kthread = kthread;
- wake_up_process(kthread);
return 0;
}
diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c
index 7520d43aed55..89d6cbac6f10 100644
--- a/kernel/trace/trace_osnoise.c
+++ b/kernel/trace/trace_osnoise.c
@@ -1701,7 +1701,7 @@ static int start_kthread(unsigned int cpu)
snprintf(comm, 24, "osnoise/%d", cpu);
}
- kthread = kthread_create_on_cpu(main, NULL, cpu, comm);
+ kthread = kthread_run_on_cpu(main, NULL, cpu, comm);
if (IS_ERR(kthread)) {
pr_err(BANNER "could not start sampling thread\n");
@@ -1710,7 +1710,6 @@ static int start_kthread(unsigned int cpu)
}
per_cpu(per_cpu_osnoise_var, cpu).kthread = kthread;
- wake_up_process(kthread);
return 0;
}
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-12 16:42:56 +0000