The patch titled
Subject: mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status-v5
has been added to the -mm tree. Its filename is
mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status-v5.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status-v5.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status-v5.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Subject: mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status-v5
v4 -> v5:
- add (struct hugetlb_usage *) to struct mm_struct
- use %lu instead of %d for seq_printf()
- introduce hugetlb_fork
Cc: Joern Engel <joern@xxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/filesystems/proc.txt | 2 +-
fs/hugetlbfs/inode.c | 12 ++++++++++++
include/linux/hugetlb.h | 22 +++++++++++++++++++---
include/linux/mm_types.h | 7 ++-----
kernel/fork.c | 3 +++
mm/hugetlb.c | 25 ++++++++++++++++++++++---
mm/mmap.c | 1 +
7 files changed, 60 insertions(+), 12 deletions(-)
diff -puN Documentation/filesystems/proc.txt~mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status-v5 Documentation/filesystems/proc.txt
--- a/Documentation/filesystems/proc.txt~mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status-v5
+++ a/Documentation/filesystems/proc.txt
@@ -174,7 +174,7 @@ read the file /proc/PID/status:
VmLib: 1412 kB
VmPTE: 20 kb
VmSwap: 0 kB
- HugetlbPages: 0 kB (0x2048kB)
+ HugetlbPages: 0 kB (0*2048kB)
Threads: 1
SigQ: 0/28578
SigPnd: 0000000000000000
diff -puN fs/hugetlbfs/inode.c~mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status-v5 fs/hugetlbfs/inode.c
--- a/fs/hugetlbfs/inode.c~mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status-v5
+++ a/fs/hugetlbfs/inode.c
@@ -139,6 +139,13 @@ static int hugetlbfs_file_mmap(struct fi
if (vma->vm_pgoff & (~huge_page_mask(h) >> PAGE_SHIFT))
return -EINVAL;
+ if (!vma->vm_mm->hugetlb_usage) {
+ vma->vm_mm->hugetlb_usage = kzalloc(sizeof(struct hugetlb_usage),
+ GFP_KERNEL);
+ if (!vma->vm_mm->hugetlb_usage)
+ return -ENOMEM;
+ }
+
vma_len = (loff_t)(vma->vm_end - vma->vm_start);
mutex_lock(&inode->i_mutex);
@@ -162,6 +169,11 @@ out:
return ret;
}
+void exit_hugetlb_mmap(struct mm_struct *mm)
+{
+ kfree(mm->hugetlb_usage);
+}
+
/*
* Called under down_write(mmap_sem).
*/
diff -puN include/linux/hugetlb.h~mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status-v5 include/linux/hugetlb.h
--- a/include/linux/hugetlb.h~mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status-v5
+++ a/include/linux/hugetlb.h
@@ -483,18 +483,25 @@ static inline spinlock_t *huge_pte_lockp
#define hugepages_supported() (HPAGE_SHIFT != 0)
#endif
+struct hugetlb_usage {
+ atomic_long_t count[HUGE_MAX_HSTATE];
+};
+
void hugetlb_report_usage(struct seq_file *m, struct mm_struct *mm);
+void exit_hugetlb_mmap(struct mm_struct *mm);
+int hugetlb_fork(struct mm_struct *new, struct mm_struct *old);
static inline void inc_hugetlb_count(struct mm_struct *mm, struct hstate *h)
{
- atomic_long_inc(&mm->hugetlb_usage.count[hstate_index(h)]);
+ VM_BUG_ON_MM(!mm->hugetlb_usage, mm);
+ atomic_long_inc(&mm->hugetlb_usage->count[hstate_index(h)]);
}
static inline void dec_hugetlb_count(struct mm_struct *mm, struct hstate *h)
{
- atomic_long_dec(&mm->hugetlb_usage.count[hstate_index(h)]);
+ VM_BUG_ON_MM(!mm->hugetlb_usage, mm);
+ atomic_long_dec(&mm->hugetlb_usage->count[hstate_index(h)]);
}
-
#else /* CONFIG_HUGETLB_PAGE */
struct hstate {};
#define alloc_huge_page(v, a, r) NULL
@@ -536,6 +543,15 @@ static inline void hugetlb_report_usage(
{
}
+static inline void exit_hugetlb_mmap(struct mm_struct *mm)
+{
+}
+
+static inline int hugetlb_fork(struct mm_struct *new, struct mm_struct *old)
+{
+ return 0;
+}
+
static inline void dec_hugetlb_count(struct mm_struct *mm, struct hstate *h)
{
}
diff -puN include/linux/mm_types.h~mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status-v5 include/linux/mm_types.h
--- a/include/linux/mm_types.h~mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status-v5
+++ a/include/linux/mm_types.h
@@ -367,9 +367,7 @@ struct mm_rss_stat {
};
#ifdef CONFIG_HUGETLB_PAGE
-struct hugetlb_usage {
- atomic_long_t count[HUGE_MAX_HSTATE];
-};
+struct hugetlb_usage;
#endif
struct kioctx_table;
@@ -492,9 +490,8 @@ struct mm_struct {
/* address of the bounds directory */
void __user *bd_addr;
#endif
-
#ifdef CONFIG_HUGETLB_PAGE
- struct hugetlb_usage hugetlb_usage;
+ struct hugetlb_usage *hugetlb_usage;
#endif
};
diff -puN kernel/fork.c~mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status-v5 kernel/fork.c
--- a/kernel/fork.c~mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status-v5
+++ a/kernel/fork.c
@@ -425,6 +425,9 @@ static int dup_mmap(struct mm_struct *mm
retval = khugepaged_fork(mm, oldmm);
if (retval)
goto out;
+ retval = hugetlb_fork(mm, oldmm);
+ if (retval)
+ goto out;
prev = NULL;
for (mpnt = oldmm->mmap; mpnt; mpnt = mpnt->vm_next) {
diff -puN mm/hugetlb.c~mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status-v5 mm/hugetlb.c
--- a/mm/hugetlb.c~mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status-v5
+++ a/mm/hugetlb.c
@@ -2790,13 +2790,20 @@ void hugetlb_show_meminfo(void)
1UL << (huge_page_order(h) + PAGE_SHIFT - 10));
}
+static unsigned long mm_hstate_usage(struct mm_struct *mm, int hs_idx)
+{
+ if (!mm->hugetlb_usage)
+ return 0;
+ return atomic_long_read(&mm->hugetlb_usage->count[hs_idx]);
+}
+
void hugetlb_report_usage(struct seq_file *m, struct mm_struct *mm)
{
int i;
unsigned long total_usage = 0;
for (i = 0; i < HUGE_MAX_HSTATE; i++) {
- total_usage += atomic_long_read(&mm->hugetlb_usage.count[i]) *
+ total_usage += mm_hstate_usage(mm, i) *
(huge_page_size(&hstates[i]) >> 10);
}
@@ -2807,13 +2814,25 @@ void hugetlb_report_usage(struct seq_fil
if (i > 0)
seq_puts(m, " ");
- seq_printf(m, "%ldx%dkB",
- atomic_long_read(&mm->hugetlb_usage.count[i]),
+ seq_printf(m, "%ld*%lukB", mm_hstate_usage(mm, i),
huge_page_size(&hstates[i]) >> 10);
}
seq_puts(m, ")\n");
}
+int hugetlb_fork(struct mm_struct *new, struct mm_struct *old)
+{
+ if (old->hugetlb_usage) {
+ new->hugetlb_usage = kmalloc(sizeof(struct hugetlb_usage),
+ GFP_KERNEL);
+ if (!new->hugetlb_usage)
+ return -ENOMEM;
+ memcpy(new->hugetlb_usage, old->hugetlb_usage,
+ sizeof(struct hugetlb_usage));
+ }
+ return 0;
+}
+
/* Return the number pages of memory we physically have, in PAGE_SIZE units. */
unsigned long hugetlb_total_pages(void)
{
diff -puN mm/mmap.c~mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status-v5 mm/mmap.c
--- a/mm/mmap.c~mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status-v5
+++ a/mm/mmap.c
@@ -2860,6 +2860,7 @@ void exit_mmap(struct mm_struct *mm)
nr_accounted += vma_pages(vma);
vma = remove_vma(vma);
}
+ exit_hugetlb_mmap(mm);
vm_unacct_memory(nr_accounted);
}
_
Patches currently in -mm which might be from n-horiguchi@xxxxxxxxxxxxx are
mm-page_isolation-make-set-unset_migratetype_isolate-file-local.patch
mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-smaps.patch
mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status.patch
mm-hugetlb-proc-add-hugetlbpages-field-to-proc-pid-status-v5.patch
mm-hwpoison-introduce-num_poisoned_pages-wrappers.patch
mm-hwpoison-dont-try-to-unpoison-containment-failed-pages.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
