linux-kernel - Re: [PATCH v2 7/9] mm, page_owner: dump page owner info from dump

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Date:	Thu, 26 Nov 2015 11:43:57 +0100
From:	Vlastimil Babka <vbabka@...e.cz>
To:	Michal Hocko <mhocko@...nel.org>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Minchan Kim <minchan@...nel.org>,
	Sasha Levin <sasha.levin@...cle.com>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Mel Gorman <mgorman@...e.de>
Subject: Re: [PATCH v2 7/9] mm, page_owner: dump page owner info from
 dump_page()

On 11/25/2015 03:58 PM, Michal Hocko wrote:
> Nice! This can be really helpful.
> 
>> Signed-off-by: Vlastimil Babka <vbabka@...e.cz>
> 
> Appart from a typo below, looks good to me
> Acked-by: Michal Hocko <mhocko@...e.com>

Thanks!

> [...]
> 
>> +void __dump_page_owner(struct page *page)
>> +{
>> +	struct page_ext *page_ext = lookup_page_ext(page);
>> +	struct stack_trace trace = {
>> +		.nr_entries = page_ext->nr_entries,
>> +		.entries = &page_ext->trace_entries[0],
>> +	};
>> +	gfp_t gfp_mask = page_ext->gfp_mask;
>> +	int mt = gfpflags_to_migratetype(gfp_mask);
>> +
>> +	if (!test_bit(PAGE_EXT_OWNER, &page_ext->flags)) {
>> +		pr_alert("page_owner info is not active (free page?)\n");
>> +		return;
>> +	}
>> +			                        ;
> 
> Typo?

The cat did it!

------8<------
From: Vlastimil Babka <vbabka@...e.cz>
Date: Thu, 26 Nov 2015 11:41:11 +0100
Subject: mm, page_owner: dump page owner info from dump_page()-fix

Remove stray semicolon.
---
 mm/page_owner.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/page_owner.c b/mm/page_owner.c
index a81cfa0c13c3..f4acd2452c35 100644
--- a/mm/page_owner.c
+++ b/mm/page_owner.c
@@ -207,7 +207,7 @@ void __dump_page_owner(struct page *page)
 		pr_alert("page_owner info is not active (free page?)\n");
 		return;
 	}
-			                        ;
+
 	pr_alert("page allocated via order %u, migratetype %s, gfp_mask 0x%x",
 			page_ext->order, migratetype_names[mt], gfp_mask);
 	dump_gfpflag_names(gfp_mask);
-- 
2.6.3


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