Messages in this thread | | | Date | Thu, 14 Jan 2010 14:47:32 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH 1/3] mm: page_alloc.c Remove duplicate call to trace_mm_page_free_direct |
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On Wed, 13 Jan 2010 22:49:17 +0800 Li Hong <lihong.hi@gmail.com> wrote:
> Function 'trace_mm_page_free_direct' is called in function '__free_pages'. > But it is called again in 'free_hot_page' if order == 0 and produce duplicate > records in trace file for mm_page_free_direct event. As below:
When naming functions in changelogs you can just use the name of the function followed by (), such as trace_mm_page_free_direct(). There's no need to call it "function 'trace_mm_page_free_direct'".
> K-PID CPU# TIMESTAMP FUNCTION > gnome-terminal-1567 [000] 4415.246466: mm_page_free_direct: page=ffffea0003db9f40 pfn=1155800 order=0 > gnome-terminal-1567 [000] 4415.246468: mm_page_free_direct: page=ffffea0003db9f40 pfn=1155800 order=0 > gnome-terminal-1567 [000] 4415.246506: mm_page_alloc: page=ffffea0003db9f40 pfn=1155800 order=0 migratetype=0 gfp_flags=GFP_KERNEL > gnome-terminal-1567 [000] 4415.255557: mm_page_free_direct: page=ffffea0003db9f40 pfn=1155800 order=0 > gnome-terminal-1567 [000] 4415.255557: mm_page_free_direct: page=ffffea0003db9f40 pfn=1155800 order=0 > > This patch removes the first call and add a call to 'trace_mm_page_free_direct' > in '__free_pages_ok'. > > Signed-off-by: Li Hong <lihong.hi@gmail.com> > --- > mm/page_alloc.c | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/mm/page_alloc.c b/mm/page_alloc.c > index 4e9f5cc..24344cd 100644 > --- a/mm/page_alloc.c > +++ b/mm/page_alloc.c > @@ -582,6 +582,7 @@ static void __free_pages_ok(struct page *page, unsigned int order) > int bad = 0; > int wasMlocked = __TestClearPageMlocked(page); > > + trace_mm_page_free_direct(page, order); > kmemcheck_free_shadow(page, order); > > for (i = 0 ; i < (1 << order) ; ++i) > @@ -2012,7 +2013,6 @@ void __pagevec_free(struct pagevec *pvec) > void __free_pages(struct page *page, unsigned int order) > { > if (put_page_testzero(page)) { > - trace_mm_page_free_direct(page, order);
Your email client replaces tabs with spaces. I can fix that up, but please do repair that email client. Documentation/email-clients.txt has some help for gmail, but it's ugly.
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