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Groups > linux.kernel > #1210292 > unrolled thread
| Started by | Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> |
|---|---|
| First post | 2015-08-20 10:50 +0200 |
| Last post | 2015-09-07 08:50 +0200 |
| Articles | 8 — 3 participants |
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[PATCH v5 0/2] hugetlb: display per-process/per-vma usage Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> - 2015-08-20 10:50 +0200
[PATCH v5 1/2] mm: hugetlb: proc: add HugetlbPages field to /proc/PID/smaps Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> - 2015-08-20 10:50 +0200
Re: [PATCH v5 1/2] mm: hugetlb: proc: add HugetlbPages field to /proc/PID/smaps Michal Hocko <mhocko@kernel.org> - 2015-08-20 12:50 +0200
Re: [PATCH v5 1/2] mm: hugetlb: proc: add HugetlbPages field to /proc/PID/smaps Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> - 2015-08-21 01:30 +0200
Re: [PATCH v5 1/2] mm: hugetlb: proc: add HugetlbPages field to /proc/PID/smaps Michal Hocko <mhocko@kernel.org> - 2015-08-21 08:40 +0200
Re: [PATCH v5 1/2] mm: hugetlb: proc: add HugetlbPages field to /proc/PID/smaps Pádraig Brady <P@draigBrady.com> - 2015-09-07 03:40 +0200
Re: [PATCH v5 1/2] mm: hugetlb: proc: add HugetlbPages field to /proc/PID/smaps Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> - 2015-09-07 04:30 +0200
Re: [PATCH v5 1/2] mm: hugetlb: proc: add HugetlbPages field to /proc/PID/smaps Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> - 2015-09-07 08:50 +0200
| From | Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> |
|---|---|
| Date | 2015-08-20 10:50 +0200 |
| Subject | [PATCH v5 0/2] hugetlb: display per-process/per-vma usage |
| Message-ID | <pZtHQ-8aH-15@gated-at.bofh.it> |
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| From | Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> |
|---|---|
| Date | 2015-08-20 10:50 +0200 |
| Subject | [PATCH v5 1/2] mm: hugetlb: proc: add HugetlbPages field to /proc/PID/smaps |
| Message-ID | <pZtHQ-8aH-27@gated-at.bofh.it> |
| In reply to | #1210292 |
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| From | Michal Hocko <mhocko@kernel.org> |
|---|---|
| Date | 2015-08-20 12:50 +0200 |
| Subject | Re: [PATCH v5 1/2] mm: hugetlb: proc: add HugetlbPages field to /proc/PID/smaps |
| Message-ID | <pZvzY-2qY-7@gated-at.bofh.it> |
| In reply to | #1210294 |
On Thu 20-08-15 08:26:26, Naoya Horiguchi wrote:
> Currently /proc/PID/smaps provides no usage info for vma(VM_HUGETLB), which
> is inconvenient when we want to know per-task or per-vma base hugetlb usage.
> To solve this, this patch adds a new line for hugetlb usage like below:
>
> Size: 20480 kB
> Rss: 0 kB
> Pss: 0 kB
> Shared_Clean: 0 kB
> Shared_Dirty: 0 kB
> Private_Clean: 0 kB
> Private_Dirty: 0 kB
> Referenced: 0 kB
> Anonymous: 0 kB
> AnonHugePages: 0 kB
> HugetlbPages: 18432 kB
> Swap: 0 kB
> KernelPageSize: 2048 kB
> MMUPageSize: 2048 kB
> Locked: 0 kB
> VmFlags: rd wr mr mw me de ht
I have only now got to this thread. This is indeed very helpful. I would
just suggest to update Documentation/filesystems/proc.txt to be explicit
that Rss: doesn't count hugetlb pages for historical reasons.
> Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
> Acked-by: Joern Engel <joern@logfs.org>
> Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
> ---
> v3 -> v4:
> - suspend Acked-by tag because v3->v4 change is not trivial
> - I stated in previous discussion that HugetlbPages line can contain page
> size info, but that's not necessary because we already have KernelPageSize
> info.
> - merged documentation update, where the current documentation doesn't mention
> AnonHugePages, so it's also added.
> ---
> Documentation/filesystems/proc.txt | 7 +++++--
> fs/proc/task_mmu.c | 29 +++++++++++++++++++++++++++++
> 2 files changed, 34 insertions(+), 2 deletions(-)
>
> diff --git v4.2-rc4/Documentation/filesystems/proc.txt v4.2-rc4_patched/Documentation/filesystems/proc.txt
> index 6f7fafde0884..22e40211ef64 100644
> --- v4.2-rc4/Documentation/filesystems/proc.txt
> +++ v4.2-rc4_patched/Documentation/filesystems/proc.txt
> @@ -423,6 +423,8 @@ Private_Clean: 0 kB
> Private_Dirty: 0 kB
> Referenced: 892 kB
> Anonymous: 0 kB
> +AnonHugePages: 0 kB
> +HugetlbPages: 0 kB
> Swap: 0 kB
> KernelPageSize: 4 kB
> MMUPageSize: 4 kB
> @@ -440,8 +442,9 @@ indicates the amount of memory currently marked as referenced or accessed.
> "Anonymous" shows the amount of memory that does not belong to any file. Even
> a mapping associated with a file may contain anonymous pages: when MAP_PRIVATE
> and a page is modified, the file page is replaced by a private anonymous copy.
> -"Swap" shows how much would-be-anonymous memory is also used, but out on
> -swap.
> +"AnonHugePages" shows the ammount of memory backed by transparent hugepage.
> +"HugetlbPages" shows the ammount of memory backed by hugetlbfs page.
> +"Swap" shows how much would-be-anonymous memory is also used, but out on swap.
>
> "VmFlags" field deserves a separate description. This member represents the kernel
> flags associated with the particular virtual memory area in two letter encoded
> diff --git v4.2-rc4/fs/proc/task_mmu.c v4.2-rc4_patched/fs/proc/task_mmu.c
> index ca1e091881d4..2c37938b82ee 100644
> --- v4.2-rc4/fs/proc/task_mmu.c
> +++ v4.2-rc4_patched/fs/proc/task_mmu.c
> @@ -445,6 +445,7 @@ struct mem_size_stats {
> unsigned long anonymous;
> unsigned long anonymous_thp;
> unsigned long swap;
> + unsigned long hugetlb;
> u64 pss;
> };
>
> @@ -610,12 +611,38 @@ static void show_smap_vma_flags(struct seq_file *m, struct vm_area_struct *vma)
> seq_putc(m, '\n');
> }
>
> +#ifdef CONFIG_HUGETLB_PAGE
> +static int smaps_hugetlb_range(pte_t *pte, unsigned long hmask,
> + unsigned long addr, unsigned long end,
> + struct mm_walk *walk)
> +{
> + struct mem_size_stats *mss = walk->private;
> + struct vm_area_struct *vma = walk->vma;
> + struct page *page = NULL;
> +
> + if (pte_present(*pte)) {
> + page = vm_normal_page(vma, addr, *pte);
> + } else if (is_swap_pte(*pte)) {
> + swp_entry_t swpent = pte_to_swp_entry(*pte);
> +
> + if (is_migration_entry(swpent))
> + page = migration_entry_to_page(swpent);
> + }
> + if (page)
> + mss->hugetlb += huge_page_size(hstate_vma(vma));
> + return 0;
> +}
> +#endif /* HUGETLB_PAGE */
> +
> static int show_smap(struct seq_file *m, void *v, int is_pid)
> {
> struct vm_area_struct *vma = v;
> struct mem_size_stats mss;
> struct mm_walk smaps_walk = {
> .pmd_entry = smaps_pte_range,
> +#ifdef CONFIG_HUGETLB_PAGE
> + .hugetlb_entry = smaps_hugetlb_range,
> +#endif
> .mm = vma->vm_mm,
> .private = &mss,
> };
> @@ -637,6 +664,7 @@ static int show_smap(struct seq_file *m, void *v, int is_pid)
> "Referenced: %8lu kB\n"
> "Anonymous: %8lu kB\n"
> "AnonHugePages: %8lu kB\n"
> + "HugetlbPages: %8lu kB\n"
> "Swap: %8lu kB\n"
> "KernelPageSize: %8lu kB\n"
> "MMUPageSize: %8lu kB\n"
> @@ -651,6 +679,7 @@ static int show_smap(struct seq_file *m, void *v, int is_pid)
> mss.referenced >> 10,
> mss.anonymous >> 10,
> mss.anonymous_thp >> 10,
> + mss.hugetlb >> 10,
> mss.swap >> 10,
> vma_kernel_pagesize(vma) >> 10,
> vma_mmu_pagesize(vma) >> 10,
> --
> 2.4.3
> N?????r??y????b?X??ǧv?^?){.n?+????{????zX????ܨ}???Ơz?&j:+v???????zZ+??+zf???h???~????i???z? ?w?????????&?)ߢf??^jǫy?m??@A?a??? 0??h???i
--
Michal Hocko
SUSE Labs
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| From | Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> |
|---|---|
| Date | 2015-08-21 01:30 +0200 |
| Subject | Re: [PATCH v5 1/2] mm: hugetlb: proc: add HugetlbPages field to /proc/PID/smaps |
| Message-ID | <pZHrr-2Sp-7@gated-at.bofh.it> |
| In reply to | #1210407 |
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| From | Michal Hocko <mhocko@kernel.org> |
|---|---|
| Date | 2015-08-21 08:40 +0200 |
| Subject | Re: [PATCH v5 1/2] mm: hugetlb: proc: add HugetlbPages field to /proc/PID/smaps |
| Message-ID | <pZO9A-44i-5@gated-at.bofh.it> |
| In reply to | #1210786 |
On Thu 20-08-15 23:20:12, Naoya Horiguchi wrote: [...] > From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> > Date: Fri, 21 Aug 2015 08:13:31 +0900 > Subject: [PATCH] Documentation/filesystems/proc.txt: give additional comment > about hugetlb usage > > --- > Documentation/filesystems/proc.txt | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt > index f561fc46e41b..b775b6faaeda 100644 > --- a/Documentation/filesystems/proc.txt > +++ b/Documentation/filesystems/proc.txt > @@ -446,7 +446,8 @@ indicates the amount of memory currently marked as referenced or accessed. > a mapping associated with a file may contain anonymous pages: when MAP_PRIVATE > and a page is modified, the file page is replaced by a private anonymous copy. > "AnonHugePages" shows the ammount of memory backed by transparent hugepage. > -"HugetlbPages" shows the ammount of memory backed by hugetlbfs page. > +"HugetlbPages" shows the ammount of memory backed by hugetlbfs page (which is > +not counted in "Rss" or "Pss" field for historical reasons.) > "Swap" shows how much would-be-anonymous memory is also used, but out on swap. > > "VmFlags" field deserves a separate description. This member represents the kernel Thank you! -- Michal Hocko SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Pádraig Brady <P@draigBrady.com> |
|---|---|
| Date | 2015-09-07 03:40 +0200 |
| Subject | Re: [PATCH v5 1/2] mm: hugetlb: proc: add HugetlbPages field to /proc/PID/smaps |
| Message-ID | <q5Tzz-7IK-1@gated-at.bofh.it> |
| In reply to | #1210294 |
On 20/08/15 09:26, Naoya Horiguchi wrote:
> Currently /proc/PID/smaps provides no usage info for vma(VM_HUGETLB), which
> is inconvenient when we want to know per-task or per-vma base hugetlb usage.
> To solve this, this patch adds a new line for hugetlb usage like below:
>
> Size: 20480 kB
> Rss: 0 kB
> Pss: 0 kB
> Shared_Clean: 0 kB
> Shared_Dirty: 0 kB
> Private_Clean: 0 kB
> Private_Dirty: 0 kB
> Referenced: 0 kB
> Anonymous: 0 kB
> AnonHugePages: 0 kB
> HugetlbPages: 18432 kB
> Swap: 0 kB
> KernelPageSize: 2048 kB
> MMUPageSize: 2048 kB
> Locked: 0 kB
> VmFlags: rd wr mr mw me de ht
>
> Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
> Acked-by: Joern Engel <joern@logfs.org>
> Acked-by: David Rientjes <rientjes@google.com>
> ---
> v3 -> v4:
> - suspend Acked-by tag because v3->v4 change is not trivial
> - I stated in previous discussion that HugetlbPages line can contain page
> size info, but that's not necessary because we already have KernelPageSize
> info.
> - merged documentation update, where the current documentation doesn't mention
> AnonHugePages, so it's also added.
> ---
> Documentation/filesystems/proc.txt | 7 +++++--
> fs/proc/task_mmu.c | 29 +++++++++++++++++++++++++++++
> 2 files changed, 34 insertions(+), 2 deletions(-)
>
> diff --git v4.2-rc4/Documentation/filesystems/proc.txt v4.2-rc4_patched/Documentation/filesystems/proc.txt
> index 6f7fafde0884..22e40211ef64 100644
> --- v4.2-rc4/Documentation/filesystems/proc.txt
> +++ v4.2-rc4_patched/Documentation/filesystems/proc.txt
> @@ -423,6 +423,8 @@ Private_Clean: 0 kB
> Private_Dirty: 0 kB
> Referenced: 892 kB
> Anonymous: 0 kB
> +AnonHugePages: 0 kB
> +HugetlbPages: 0 kB
> Swap: 0 kB
> KernelPageSize: 4 kB
> MMUPageSize: 4 kB
> @@ -440,8 +442,9 @@ indicates the amount of memory currently marked as referenced or accessed.
> "Anonymous" shows the amount of memory that does not belong to any file. Even
> a mapping associated with a file may contain anonymous pages: when MAP_PRIVATE
> and a page is modified, the file page is replaced by a private anonymous copy.
> -"Swap" shows how much would-be-anonymous memory is also used, but out on
> -swap.
> +"AnonHugePages" shows the ammount of memory backed by transparent hugepage.
> +"HugetlbPages" shows the ammount of memory backed by hugetlbfs page.
> +"Swap" shows how much would-be-anonymous memory is also used, but out on swap.
There is no distinction between "private" and "shared" in this "huge page" accounting right?
Would it be possible to account for the huge pages in the {Private,Shared}_{Clean,Dirty} fields?
Or otherwise split the huge page accounting into shared/private?
thanks!
Pádraig.
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| From | Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> |
|---|---|
| Date | 2015-09-07 04:30 +0200 |
| Subject | Re: [PATCH v5 1/2] mm: hugetlb: proc: add HugetlbPages field to /proc/PID/smaps |
| Message-ID | <q5UlY-wp-1@gated-at.bofh.it> |
| In reply to | #1219887 |
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| From | Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> |
|---|---|
| Date | 2015-09-07 08:50 +0200 |
| Subject | Re: [PATCH v5 1/2] mm: hugetlb: proc: add HugetlbPages field to /proc/PID/smaps |
| Message-ID | <q5YpA-6fh-19@gated-at.bofh.it> |
| In reply to | #1219896 |
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