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docs/vm: remove unused 3 items explanation for /proc/vmstat

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Commit 5647bc293a ("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/1605520282-51993-1-git-send-email-alex.shi@linux.alibaba.com
Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Yang Shi <yang.shi@linux.alibaba.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alex Shi 2020-12-14 19:09:02 -08:00 committed by Linus Torvalds
parent 0a7dd4e901
commit 56db19fef3
1 changed files with 0 additions and 15 deletions
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15
Documentation/admin-guide/mm/transhuge.rst
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@ -401,21 +401,6 @@ compact_fail
is incremented if the system tries to compact memory is incremented if the system tries to compact memory
but failed. 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 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 tracer to record how long was spent in __alloc_pages_nodemask and
using the mm_page_alloc tracepoint to identify which allocations were using the mm_page_alloc tracepoint to identify which allocations were