[099/200] docs/vm: remove unused 3 items explanation for /proc/vmstat

Commit Message

Andrew Morton Dec. 15, 2020, 3:09 a.m. UTC

From: Alex Shi <[e-mail]>
Subject: docs/vm: remove unused 3 items explanation for /proc/vmstat

Commit 5647bc293ab1 ("mm: compaction: Move migration fail/success
stats to migrate.c"), removed 3 items in /proc/vmstat. but the docs
still has their explanation. let's remove them.

"compact_blocks_moved",
"compact_pages_moved",
"compact_pagemigrate_failed",

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Alex Shi <[e-mail]>
Reviewed-by: Zi Yan <[e-mail]>
Cc: Jonathan Corbet <[e-mail]>
Cc: Yang Shi <[e-mail]>
Cc: "Kirill A. Shutemov" <[e-mail]>
Cc: David Rientjes <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
---

 Documentation/admin-guide/mm/transhuge.rst |   15 ---------------
 1 file changed, 15 deletions(-)

Patch

--- a/Documentation/admin-guide/mm/transhuge.rst~docs-vm-remove-unused-3-items-explanation-for-proc-vmstat
+++ a/Documentation/admin-guide/mm/transhuge.rst
@@ -401,21 +401,6 @@  compact_fail
 	is incremented if the system tries to compact memory
 	but failed.
 
-compact_pages_moved
-	is incremented each time a page is moved. If
-	this value is increasing rapidly, it implies that the system
-	is copying a lot of data to satisfy the huge page allocation.
-	It is possible that the cost of copying exceeds any savings
-	from reduced TLB misses.
-
-compact_pagemigrate_failed
-	is incremented when the underlying mechanism
-	for moving a page failed.
-
-compact_blocks_moved
-	is incremented each time memory compaction examines
-	a huge page aligned range of pages.
-
 It is possible to establish how long the stalls were using the function
 tracer to record how long was spent in __alloc_pages_nodemask and
 using the mm_page_alloc tracepoint to identify which allocations were