From: Dave Hansen <dave@sr71.net>
To: Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Andrew Morton <akpm@linux-foundation.org>
Cc: Mel Gorman <mgorman@suse.de>,
Johannes Weiner <hannes@cmpxchg.org>,
Minchan Kim <minchan@kernel.org>,
Alexander Nyberg <alexn@dsv.su.se>,
Dave Hansen <dave@linux.vnet.ibm.com>,
Michal Nazarewicz <mina86@mina86.com>,
Jungsoo Son <jungsoo.son@lge.com>, Ingo Molnar <mingo@redhat.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH 1/5] mm/page_ext: resurrect struct page extending code for debugging
Date: Wed, 12 Nov 2014 08:33:40 -0800 [thread overview]
Message-ID: <54638BE4.3080509@sr71.net> (raw)
In-Reply-To: <1415780835-24642-2-git-send-email-iamjoonsoo.kim@lge.com>
On 11/12/2014 12:27 AM, Joonsoo Kim wrote:
> @@ -1092,6 +1096,14 @@ struct mem_section {
>
> /* See declaration of similar field in struct zone */
> unsigned long *pageblock_flags;
> +#ifdef CONFIG_PAGE_EXTENSION
> + /*
> + * If !SPARSEMEM, pgdat doesn't have page_ext pointer. We use
> + * section. (see page_ext.h about this.)
> + */
> + struct page_ext *page_ext;
> + unsigned long pad;
> +#endif
Will the distributions be amenable to enabling this? If so, I'm all for
it if it gets us things like page_owner at runtime.
If not, this becomes of much more questionable utility.
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next prev parent reply other threads:[~2014-11-12 16:33 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-12 8:27 [RFC PATCH 0/5] Resurrect and use struct page extension for some debugging features Joonsoo Kim
2014-11-12 8:27 ` [RFC PATCH 1/5] mm/page_ext: resurrect struct page extending code for debugging Joonsoo Kim
2014-11-12 16:33 ` Dave Hansen [this message]
2014-11-13 6:40 ` Joonsoo Kim
2014-11-13 20:40 ` Andrew Morton
2014-11-14 0:14 ` Joonsoo Kim
2014-11-12 8:27 ` [RFC PATCH 2/5] mm/debug-pagealloc: prepare boottime configurable on/off Joonsoo Kim
2014-11-12 8:27 ` [RFC PATCH 3/5] mm/debug-pagealloc: make debug-pagealloc boottime configurable Joonsoo Kim
2014-11-12 8:27 ` [RFC PATCH 4/5] stacktrace: support snprint Joonsoo Kim
2014-11-12 8:27 ` [RFC PATCH 5/5] mm/page_owner: keep track of page owners Joonsoo Kim
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