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-rw-r--r--fs/proc/Kconfig2
-rw-r--r--fs/proc/array.c66
-rw-r--r--fs/proc/base.c2
-rw-r--r--fs/proc/inode.c21
-rw-r--r--fs/proc/kcore.c2
-rw-r--r--fs/proc/root.c2
-rw-r--r--fs/proc/task_mmu.c17
7 files changed, 57 insertions, 55 deletions
diff --git a/fs/proc/Kconfig b/fs/proc/Kconfig
index 32b1116ae137..d80a1431ef7b 100644
--- a/fs/proc/Kconfig
+++ b/fs/proc/Kconfig
@@ -32,7 +32,7 @@ config PROC_FS
config PROC_KCORE
bool "/proc/kcore support" if !ARM
depends on PROC_FS && MMU
- select CRASH_CORE
+ select VMCORE_INFO
help
Provides a virtual ELF core file of the live kernel. This can
be read with gdb and other ELF tools. No modifications can be
diff --git a/fs/proc/array.c b/fs/proc/array.c
index ff08a8957552..34a47fb0c57f 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -477,13 +477,13 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
int permitted;
struct mm_struct *mm;
unsigned long long start_time;
- unsigned long cmin_flt = 0, cmaj_flt = 0;
- unsigned long min_flt = 0, maj_flt = 0;
- u64 cutime, cstime, utime, stime;
- u64 cgtime, gtime;
+ unsigned long cmin_flt, cmaj_flt, min_flt, maj_flt;
+ u64 cutime, cstime, cgtime, utime, stime, gtime;
unsigned long rsslim = 0;
unsigned long flags;
int exit_code = task->exit_code;
+ struct signal_struct *sig = task->signal;
+ unsigned int seq = 1;
state = *get_task_state(task);
vsize = eip = esp = 0;
@@ -511,12 +511,8 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
sigemptyset(&sigign);
sigemptyset(&sigcatch);
- cutime = cstime = utime = stime = 0;
- cgtime = gtime = 0;
if (lock_task_sighand(task, &flags)) {
- struct signal_struct *sig = task->signal;
-
if (sig->tty) {
struct pid *pgrp = tty_get_pgrp(sig->tty);
tty_pgrp = pid_nr_ns(pgrp, ns);
@@ -527,28 +523,9 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
num_threads = get_nr_threads(task);
collect_sigign_sigcatch(task, &sigign, &sigcatch);
- cmin_flt = sig->cmin_flt;
- cmaj_flt = sig->cmaj_flt;
- cutime = sig->cutime;
- cstime = sig->cstime;
- cgtime = sig->cgtime;
rsslim = READ_ONCE(sig->rlim[RLIMIT_RSS].rlim_cur);
- /* add up live thread stats at the group level */
if (whole) {
- struct task_struct *t;
-
- __for_each_thread(sig, t) {
- min_flt += t->min_flt;
- maj_flt += t->maj_flt;
- gtime += task_gtime(t);
- }
-
- min_flt += sig->min_flt;
- maj_flt += sig->maj_flt;
- thread_group_cputime_adjusted(task, &utime, &stime);
- gtime += sig->gtime;
-
if (sig->flags & (SIGNAL_GROUP_EXIT | SIGNAL_STOP_STOPPED))
exit_code = sig->group_exit_code;
}
@@ -562,10 +539,41 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
if (permitted && (!whole || num_threads < 2))
wchan = !task_is_running(task);
- if (!whole) {
+
+ do {
+ seq++; /* 2 on the 1st/lockless path, otherwise odd */
+ flags = read_seqbegin_or_lock_irqsave(&sig->stats_lock, &seq);
+
+ cmin_flt = sig->cmin_flt;
+ cmaj_flt = sig->cmaj_flt;
+ cutime = sig->cutime;
+ cstime = sig->cstime;
+ cgtime = sig->cgtime;
+
+ if (whole) {
+ struct task_struct *t;
+
+ min_flt = sig->min_flt;
+ maj_flt = sig->maj_flt;
+ gtime = sig->gtime;
+
+ rcu_read_lock();
+ __for_each_thread(sig, t) {
+ min_flt += t->min_flt;
+ maj_flt += t->maj_flt;
+ gtime += task_gtime(t);
+ }
+ rcu_read_unlock();
+ }
+ } while (need_seqretry(&sig->stats_lock, seq));
+ done_seqretry_irqrestore(&sig->stats_lock, seq, flags);
+
+ if (whole) {
+ thread_group_cputime_adjusted(task, &utime, &stime);
+ } else {
+ task_cputime_adjusted(task, &utime, &stime);
min_flt = task->min_flt;
maj_flt = task->maj_flt;
- task_cputime_adjusted(task, &utime, &stime);
gtime = task_gtime(task);
}
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 98a031ac2648..18550c071d71 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1878,8 +1878,6 @@ void proc_pid_evict_inode(struct proc_inode *ei)
hlist_del_init_rcu(&ei->sibling_inodes);
spin_unlock(&pid->lock);
}
-
- put_pid(pid);
}
struct inode *proc_pid_make_inode(struct super_block *sb,
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index b33e490e3fd9..dcd513dccf55 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -30,7 +30,6 @@
static void proc_evict_inode(struct inode *inode)
{
- struct proc_dir_entry *de;
struct ctl_table_header *head;
struct proc_inode *ei = PROC_I(inode);
@@ -38,17 +37,8 @@ static void proc_evict_inode(struct inode *inode)
clear_inode(inode);
/* Stop tracking associated processes */
- if (ei->pid) {
+ if (ei->pid)
proc_pid_evict_inode(ei);
- ei->pid = NULL;
- }
-
- /* Let go of any associated proc directory entry */
- de = ei->pde;
- if (de) {
- pde_put(de);
- ei->pde = NULL;
- }
head = ei->sysctl;
if (head) {
@@ -80,6 +70,13 @@ static struct inode *proc_alloc_inode(struct super_block *sb)
static void proc_free_inode(struct inode *inode)
{
+ struct proc_inode *ei = PROC_I(inode);
+
+ if (ei->pid)
+ put_pid(ei->pid);
+ /* Let go of any associated proc directory entry */
+ if (ei->pde)
+ pde_put(ei->pde);
kmem_cache_free(proc_inode_cachep, PROC_I(inode));
}
@@ -95,7 +92,7 @@ void __init proc_init_kmemcache(void)
proc_inode_cachep = kmem_cache_create("proc_inode_cache",
sizeof(struct proc_inode),
0, (SLAB_RECLAIM_ACCOUNT|
- SLAB_MEM_SPREAD|SLAB_ACCOUNT|
+ SLAB_ACCOUNT|
SLAB_PANIC),
init_once);
pde_opener_cache =
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index 6422e569b080..8e08a9a1b7ed 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -10,7 +10,7 @@
* Safe accesses to vmalloc/direct-mapped discontiguous areas, Kanoj Sarcar <[email protected]>
*/
-#include <linux/crash_core.h>
+#include <linux/vmcore_info.h>
#include <linux/mm.h>
#include <linux/proc_fs.h>
#include <linux/kcore.h>
diff --git a/fs/proc/root.c b/fs/proc/root.c
index b55dbc70287b..06a297a27ba3 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -271,7 +271,7 @@ static void proc_kill_sb(struct super_block *sb)
kill_anon_super(sb);
put_pid_ns(fs_info->pid_ns);
- kfree(fs_info);
+ kfree_rcu(fs_info, rcu);
}
static struct file_system_type proc_fs_type = {
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 3f78ebbb795f..23fbab954c20 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -1352,8 +1352,7 @@ static inline pagemap_entry_t make_pme(u64 frame, u64 flags)
return (pagemap_entry_t) { .pme = (frame & PM_PFRAME_MASK) | flags };
}
-static int add_to_pagemap(unsigned long addr, pagemap_entry_t *pme,
- struct pagemapread *pm)
+static int add_to_pagemap(pagemap_entry_t *pme, struct pagemapread *pm)
{
pm->buffer[pm->pos++] = *pme;
if (pm->pos >= pm->len)
@@ -1380,7 +1379,7 @@ static int pagemap_pte_hole(unsigned long start, unsigned long end,
hole_end = end;
for (; addr < hole_end; addr += PAGE_SIZE) {
- err = add_to_pagemap(addr, &pme, pm);
+ err = add_to_pagemap(&pme, pm);
if (err)
goto out;
}
@@ -1392,7 +1391,7 @@ static int pagemap_pte_hole(unsigned long start, unsigned long end,
if (vma->vm_flags & VM_SOFTDIRTY)
pme = make_pme(0, PM_SOFT_DIRTY);
for (; addr < min(end, vma->vm_end); addr += PAGE_SIZE) {
- err = add_to_pagemap(addr, &pme, pm);
+ err = add_to_pagemap(&pme, pm);
if (err)
goto out;
}
@@ -1519,7 +1518,7 @@ static int pagemap_pmd_range(pmd_t *pmdp, unsigned long addr, unsigned long end,
for (; addr != end; addr += PAGE_SIZE) {
pagemap_entry_t pme = make_pme(frame, flags);
- err = add_to_pagemap(addr, &pme, pm);
+ err = add_to_pagemap(&pme, pm);
if (err)
break;
if (pm->show_pfn) {
@@ -1547,7 +1546,7 @@ static int pagemap_pmd_range(pmd_t *pmdp, unsigned long addr, unsigned long end,
pagemap_entry_t pme;
pme = pte_to_pagemap_entry(pm, vma, addr, ptep_get(pte));
- err = add_to_pagemap(addr, &pme, pm);
+ err = add_to_pagemap(&pme, pm);
if (err)
break;
}
@@ -1597,7 +1596,7 @@ static int pagemap_hugetlb_range(pte_t *ptep, unsigned long hmask,
for (; addr != end; addr += PAGE_SIZE) {
pagemap_entry_t pme = make_pme(frame, flags);
- err = add_to_pagemap(addr, &pme, pm);
+ err = add_to_pagemap(&pme, pm);
if (err)
return err;
if (pm->show_pfn && (flags & PM_PRESENT))
@@ -1807,7 +1806,7 @@ static unsigned long pagemap_page_category(struct pagemap_scan_private *p,
if (p->masks_of_interest & PAGE_IS_FILE) {
swp = pte_to_swp_entry(pte);
if (is_pfn_swap_entry(swp) &&
- !PageAnon(pfn_swap_entry_to_page(swp)))
+ !folio_test_anon(pfn_swap_entry_folio(swp)))
categories |= PAGE_IS_FILE;
}
if (pte_swp_soft_dirty(pte))
@@ -1873,7 +1872,7 @@ static unsigned long pagemap_thp_category(struct pagemap_scan_private *p,
if (p->masks_of_interest & PAGE_IS_FILE) {
swp = pmd_to_swp_entry(pmd);
if (is_pfn_swap_entry(swp) &&
- !PageAnon(pfn_swap_entry_to_page(swp)))
+ !folio_test_anon(pfn_swap_entry_folio(swp)))
categories |= PAGE_IS_FILE;
}
}
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