symbol the task is blocked in - or "0" if not blocked.
pagemap Page table
stack Report full stack trace, enable via CONFIG_STACKTRACE
- smaps a extension based on maps, showing the memory consumption of
+ smaps an extension based on maps, showing the memory consumption of
each mapping and flags associated with it
numa_maps an extension based on maps, showing the memory locality and
binding policy as well as mem usage (in pages) of each mapping.
This file is only present if the CONFIG_MMU kernel configuration option is
enabled.
+Note: reading /proc/PID/maps or /proc/PID/smaps is inherently racy (consistent
+output can be achieved only in the single read call).
+This typically manifests when doing partial reads of these files while the
+memory map is being modified. Despite the races, we do provide the following
+guarantees:
+
+1) The mapped addresses never go backwards, which implies no two
+ regions will ever overlap.
+2) If there is something at a given vaddr during the entirety of the
+ life of the smaps/maps walk, there will be some output for it.
+
+
The /proc/PID/clear_refs is used to reset the PG_Referenced and ACCESSED/YOUNG
bits on both physical and virtual pages associated with a process, and the
soft-dirty bit on pte (see Documentation/vm/soft-dirty.txt for details).