Re: [PATCH 2/3] mm/page_isolation: add new tracepoint, test_pages_isolated
From: Joonsoo Kim
Date: Fri Nov 20 2015 - 01:21:48 EST
On Thu, Nov 19, 2015 at 03:34:11PM -0800, Andrew Morton wrote:
> On Fri, 13 Nov 2015 11:23:47 +0900 Joonsoo Kim <js1304@xxxxxxxxx> wrote:
> > cma allocation should be guranteeded to succeed, but, sometimes,
> > it could be failed in current implementation. To track down
> > the problem, we need to know which page is problematic and
> > this new tracepoint will report it.
> akpm3:/usr/src/25> size mm/page_isolation.o
> text data bss dec hex filename
> 2972 112 1096 4180 1054 mm/page_isolation.o-before
> 4608 570 1840 7018 1b6a mm/page_isolation.o-after
> This seems an excessive amount of bloat for one little tracepoint. Is
> this expected and normal (and acceptable)?
I checked bloat on other tracepoints and found that it's normal.
It takes 1KB more per tracepoint.
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