https://github.com/torvalds/linux
Revision 7a2d19bced51af31d2c9ff55219400ed0a6c012f authored by Mel Gorman on 22 December 2010, 01:24:18 UTC, committed by Linus Torvalds on 23 December 2010, 03:43:33 UTC
When correlating ftrace results with /proc/vmstat, I noticed that the
reporting scripts value for "pages scanned" differed significantly.  Both
values were "right" depending on how you look at it.

The difference is due to vmstat only counting scanning of the inactive
list towards pages scanned.  The analysis script for the tracepoint counts
active and inactive list yielding a far higher value than vmstat.  The
resulting scanning/reclaim ratio looks much worse.  The tracepoint is ok
but this patch updates the reporting script so that the report values for
scanned are similar to vmstat.

Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent dd9e5ef
History
Tip revision: 7a2d19bced51af31d2c9ff55219400ed0a6c012f authored by Mel Gorman on 22 December 2010, 01:24:18 UTC
mm: vmscan: tracepoint: account for scanned pages similarly for both ftrace and vmstat
Tip revision: 7a2d19b
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.gitignore -rw-r--r-- 936 bytes
.mailmap -rw-r--r-- 3.9 KB
COPYING -rw-r--r-- 18.3 KB
CREDITS -rw-r--r-- 91.8 KB
Kbuild -rw-r--r-- 2.4 KB
Kconfig -rw-r--r-- 252 bytes
MAINTAINERS -rw-r--r-- 178.6 KB
Makefile -rw-r--r-- 50.9 KB
README -rw-r--r-- 17.1 KB
REPORTING-BUGS -rw-r--r-- 3.3 KB

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