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| Started by | Vlastimil Babka <vbabka@suse.cz> |
|---|---|
| First post | 2015-10-02 15:40 +0200 |
| Last post | 2015-10-05 03:10 +0200 |
| Articles | 3 — 3 participants |
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[PATCH v4 1/4] mm, documentation: clarify /proc/pid/status VmSwap limitations Vlastimil Babka <vbabka@suse.cz> - 2015-10-02 15:40 +0200
Re: [PATCH v4 1/4] mm, documentation: clarify /proc/pid/status VmSwap limitations Jerome Marchand <jmarchan@redhat.com> - 2015-10-02 17:00 +0200
Re: [PATCH v4 1/4] mm, documentation: clarify /proc/pid/status VmSwap limitations Hugh Dickins <hughd@google.com> - 2015-10-05 03:10 +0200
| From | Vlastimil Babka <vbabka@suse.cz> |
|---|---|
| Date | 2015-10-02 15:40 +0200 |
| Subject | [PATCH v4 1/4] mm, documentation: clarify /proc/pid/status VmSwap limitations |
| Message-ID | <qf8J4-4MS-17@gated-at.bofh.it> |
The documentation for /proc/pid/status does not mention that the value of VmSwap counts only swapped out anonymous private pages and not shmem. This is not obvious, so document this limitation. Signed-off-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Acked-by: Michal Hocko <mhocko@suse.com> --- Documentation/filesystems/proc.txt | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt index a99b208..7ef50cb 100644 --- a/Documentation/filesystems/proc.txt +++ b/Documentation/filesystems/proc.txt @@ -239,6 +239,8 @@ Table 1-2: Contents of the status files (as of 4.1) VmPTE size of page table entries VmPMD size of second level page tables VmSwap size of swap usage (the number of referred swapents) + by anonymous private data (shmem swap usage is not + included) HugetlbPages size of hugetlb memory portions Threads number of threads SigQ number of signals queued/max. number for queue -- 2.5.2 -- 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 | Jerome Marchand <jmarchan@redhat.com> |
|---|---|
| Date | 2015-10-02 17:00 +0200 |
| Subject | Re: [PATCH v4 1/4] mm, documentation: clarify /proc/pid/status VmSwap limitations |
| Message-ID | <qf9Yv-6vE-17@gated-at.bofh.it> |
| In reply to | #1238221 |
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On 10/02/2015 03:35 PM, Vlastimil Babka wrote: > The documentation for /proc/pid/status does not mention that the value of > VmSwap counts only swapped out anonymous private pages and not shmem. This is > not obvious, so document this limitation. > > Signed-off-by: Vlastimil Babka <vbabka@suse.cz> > Acked-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> > Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Jerome Marchand <jmarchan@redhat.com>
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| From | Hugh Dickins <hughd@google.com> |
|---|---|
| Date | 2015-10-05 03:10 +0200 |
| Subject | Re: [PATCH v4 1/4] mm, documentation: clarify /proc/pid/status VmSwap limitations |
| Message-ID | <qg2rT-pk-5@gated-at.bofh.it> |
| In reply to | #1238221 |
On Fri, 2 Oct 2015, Vlastimil Babka wrote:
> The documentation for /proc/pid/status does not mention that the value of
> VmSwap counts only swapped out anonymous private pages and not shmem. This is
> not obvious, so document this limitation.
>
> Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
> Acked-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
> Acked-by: Michal Hocko <mhocko@suse.com>
> ---
> Documentation/filesystems/proc.txt | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
> index a99b208..7ef50cb 100644
> --- a/Documentation/filesystems/proc.txt
> +++ b/Documentation/filesystems/proc.txt
> @@ -239,6 +239,8 @@ Table 1-2: Contents of the status files (as of 4.1)
> VmPTE size of page table entries
> VmPMD size of second level page tables
> VmSwap size of swap usage (the number of referred swapents)
> + by anonymous private data (shmem swap usage is not
> + included)
I have difficulty in reading "size of swap usage (the number of referred
swapents) by anonymous private data (shmem swap usage is not included)".
Luckily, VmSwap never was "the number of referred swapents", it's in kB.
So I suggest amount of swap used by anonymous private data
(shmem swap usage is not included)
for which you can assume Acked-by: Hugh Dickins <hughd@google.com>
Hugh
> HugetlbPages size of hugetlb memory portions
> Threads number of threads
> SigQ number of signals queued/max. number for queue
> --
> 2.5.2
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