3.11 /proc/<pid>/patch_state - Livepatch patch operation state
3.12 /proc/<pid>/arch_status - Task architecture specific information
3.13 /proc/<pid>/fd - List of symlinks to open files
- 3.14 /proc/<pid/ksm_stat - Information about the process' ksm status.
+ 3.14 /proc/<pid/ksm_stat - Information about the process's ksm status.
4 Configuring procfs
4.1 Mount options
THPeligible: 0
VmFlags: rd ex mr mw me dw
-The first of these lines shows the same information as is displayed for the
-mapping in /proc/PID/maps. Following lines show the size of the mapping
-(size); the size of each page allocated when backing a VMA (KernelPageSize),
-which is usually the same as the size in the page table entries; the page size
-used by the MMU when backing a VMA (in most cases, the same as KernelPageSize);
-the amount of the mapping that is currently resident in RAM (RSS); the
-process' proportional share of this mapping (PSS); and the number of clean and
-dirty shared and private pages in the mapping.
+The first of these lines shows the same information as is displayed for
+the mapping in /proc/PID/maps. Following lines show the size of the
+mapping (size); the size of each page allocated when backing a VMA
+(KernelPageSize), which is usually the same as the size in the page table
+entries; the page size used by the MMU when backing a VMA (in most cases,
+the same as KernelPageSize); the amount of the mapping that is currently
+resident in RAM (RSS); the process's proportional share of this mapping
+(PSS); and the number of clean and dirty shared and private pages in the
+mapping.
The "proportional set size" (PSS) of a process is the count of pages it has
in memory, where each page is divided by the number of processes sharing it.
of stat() output for /proc/<pid>/fd for fast access.
-------------------------------------------------------
-3.14 /proc/<pid/ksm_stat - Information about the process' ksm status
---------------------------------------------------------------------
+3.14 /proc/<pid/ksm_stat - Information about the process's ksm status
+---------------------------------------------------------------------
When CONFIG_KSM is enabled, each process has this file which displays
the information of ksm merging status.
ksm_merge_any
^^^^^^^^^^^^^
-It specifies whether the process'mm is added by prctl() into the candidate list
-of KSM or not, and if KSM scanning is fully enabled at process level.
+It specifies whether the process's 'mm is added by prctl() into the
+candidate list of KSM or not, and if KSM scanning is fully enabled at
+process level.
ksm_mergeable
^^^^^^^^^^^^^
-It specifies whether any VMAs of the process'mm are currently applicable
-to KSM.
+It specifies whether any VMAs of the process''s mms are currently
+applicable to KSM.
More information about KSM can be found in
Documentation/admin-guide/mm/ksm.rst.
hidepid=invisible or hidepid=2 means hidepid=1 plus all /proc/<pid>/ will be
fully invisible to other users. It doesn't mean that it hides a fact whether a
process with a specific pid value exists (it can be learned by other means, e.g.
-by "kill -0 $PID"), but it hides process' uid and gid, which may be learned by
+by "kill -0 $PID"), but it hides process's uid and gid, which may be learned by
stat()'ing /proc/<pid>/ otherwise. It greatly complicates an intruder's task of
gathering information about running processes, whether some daemon runs with
elevated privileges, whether other user runs some sensitive program, whether