Re: [PATCH v4 1/4] mm, documentation: clarify /proc/pid/status VmSwap limitations
From: Hugh Dickins <hughd@google.com>
Date: 2015-10-05 01:06:00
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On Fri, 2 Oct 2015, Vlastimil Babka wrote:
quoted hunk ↗ jump to hunk
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 <redacted> Acked-by: Konstantin Khlebnikov <redacted> 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 [off-list ref]
Hugh
HugetlbPages size of hugetlb memory portions Threads number of threads SigQ number of signals queued/max. number for queue -- 2.5.2