This includes the updates that have been made to smaps, specifically,
the addition of Hugetlb[Pud,Pmd,Pte]Mapped.
Signed-off-by: James Houghton <jthoughton@xxxxxxxxxx>
---
Documentation/filesystems/proc.rst | 56 +++++++++++++++++-------------
1 file changed, 32 insertions(+), 24 deletions(-)
diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst
index ec6cfdf1796a..807d6c0694c2 100644
--- a/Documentation/filesystems/proc.rst
+++ b/Documentation/filesystems/proc.rst
@@ -444,29 +444,32 @@ Memory Area, or VMA) there is a series of lines such as the following::
08048000-080bc000 r-xp 00000000 03:02 13130 /bin/bash
- Size: 1084 kB
- KernelPageSize: 4 kB
- MMUPageSize: 4 kB
- Rss: 892 kB
- Pss: 374 kB
- Pss_Dirty: 0 kB
- Shared_Clean: 892 kB
- Shared_Dirty: 0 kB
- Private_Clean: 0 kB
- Private_Dirty: 0 kB
- Referenced: 892 kB
- Anonymous: 0 kB
- LazyFree: 0 kB
- AnonHugePages: 0 kB
- ShmemPmdMapped: 0 kB
- Shared_Hugetlb: 0 kB
- Private_Hugetlb: 0 kB
- Swap: 0 kB
- SwapPss: 0 kB
- KernelPageSize: 4 kB
- MMUPageSize: 4 kB
- Locked: 0 kB
- THPeligible: 0
+ Size: 1084 kB
+ KernelPageSize: 4 kB
+ MMUPageSize: 4 kB
+ Rss: 892 kB
+ Pss: 374 kB
+ Pss_Dirty: 0 kB
+ Shared_Clean: 892 kB
+ Shared_Dirty: 0 kB
+ Private_Clean: 0 kB
+ Private_Dirty: 0 kB
+ Referenced: 892 kB
+ Anonymous: 0 kB
+ LazyFree: 0 kB
+ AnonHugePages: 0 kB
+ ShmemPmdMapped: 0 kB
+ Shared_Hugetlb: 0 kB
+ Private_Hugetlb: 0 kB
+ HugetlbPudMapped: 0 kB
+ HugetlbPmdMapped: 0 kB
+ HugetlbPteMapped: 0 kB
+ Swap: 0 kB
+ SwapPss: 0 kB
+ KernelPageSize: 4 kB
+ MMUPageSize: 4 kB
+ Locked: 0 kB
+ THPeligible: 0
VmFlags: rd ex mr mw me dw
The first of these lines shows the same information as is displayed for the
@@ -507,10 +510,15 @@ implementation. If this is not desirable please file a bug report.
"ShmemPmdMapped" shows the ammount of shared (shmem/tmpfs) memory backed by
huge pages.
-"Shared_Hugetlb" and "Private_Hugetlb" show the ammounts of memory backed by
+"Shared_Hugetlb" and "Private_Hugetlb" show the amounts of memory backed by
hugetlbfs page which is *not* counted in "RSS" or "PSS" field for historical
reasons. And these are not included in {Shared,Private}_{Clean,Dirty} field.
+If the kernel was compiled with ``CONFIG_HUGETLB_HIGH_GRANULARITY_MAPPING``,
+"HugetlbPudMapped", "HugetlbPmdMapped", and "HugetlbPteMapped" will appear and
+show the amount of HugeTLB memory mapped with PUDs, PMDs, and PTEs respectively.
+See Documentation/admin-guide/mm/hugetlbpage.rst.
+
"Swap" shows how much would-be-anonymous memory is also used, but out on swap.
For shmem mappings, "Swap" includes also the size of the mapped (and not
--
2.38.0.135.g90850a2211-goog
