From: Qian Cai <cai@lca.pw>
To: Anshuman Khandual <Anshuman.Khandual@arm.com>
Cc: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
Michal Hocko <mhocko@suse.com>, Vlastimil Babka <vbabka@suse.cz>,
Oscar Salvador <osalvador@suse.de>,
Mel Gorman <mgorman@techsingularity.net>,
Mike Rapoport <rppt@linux.ibm.com>,
Dan Williams <dan.j.williams@intel.com>,
Pavel Tatashin <pavel.tatashin@microsoft.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm/page_alloc: Add a reason for reserved pages in has_unmovable_pages()
Date: Thu, 3 Oct 2019 07:19:15 -0400 [thread overview]
Message-ID: <285C0297-BF27-4095-87B6-AFC88C1F3C0F@lca.pw> (raw)
In-Reply-To: <37b43978-5652-576c-8990-451e751b7c67@arm.com>
> On Oct 3, 2019, at 5:32 AM, Anshuman Khandual <Anshuman.Khandual@arm.com> wrote:
>
> Even though page flags does contain reserved bit information, the problem
> is that we are explicitly printing the reason for this page dump. In this
> case it is caused by the fact that it is a reserved page.
>
> page dumped because: <reason>
>
> The proposed change makes it explicit that the dump is caused because a
> non movable page with reserved bit set. It also helps in differentiating
> between reserved bit condition and the last one "if (found > count)".
Then, someone later would like to add a reason for every different page flags just because they *think* they are special.
next prev parent reply other threads:[~2019-10-03 11:19 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-03 8:10 [PATCH] mm/page_alloc: Add a reason for reserved pages in has_unmovable_pages() Anshuman Khandual
2019-10-03 9:05 ` Qian Cai
2019-10-03 9:32 ` Anshuman Khandual
2019-10-03 9:53 ` Anshuman Khandual
2019-10-03 11:19 ` Qian Cai [this message]
2019-10-03 11:32 ` Anshuman Khandual
2019-10-03 11:50 ` Qian Cai
2019-10-03 12:02 ` Anshuman Khandual
2019-10-03 12:14 ` Qian Cai
2019-10-04 8:25 ` David Hildenbrand
2020-01-14 8:19 ` Anshuman Khandual
2020-01-14 8:30 ` David Hildenbrand
2020-01-14 9:10 ` Michal Hocko
2020-01-14 10:23 ` Vlastimil Babka
2020-01-14 11:03 ` Anshuman Khandual
2020-01-14 11:32 ` Michal Hocko
2020-01-14 12:04 ` [PATCH] mm, debug: always print flags in dump_page() Vlastimil Babka
2020-01-14 13:35 ` Michal Hocko
2020-01-14 18:22 ` [PATCH] mm/page_alloc: Add a reason for reserved pages in has_unmovable_pages() Ralph Campbell
2019-10-04 10:58 ` Michal Hocko
2019-10-04 11:44 ` Anshuman Khandual
2019-10-04 12:56 ` Qian Cai
2019-10-04 12:56 ` Qian Cai
2019-10-04 13:07 ` Michal Hocko
2019-10-04 13:30 ` Qian Cai
2019-10-04 13:30 ` Qian Cai
2019-10-04 13:38 ` Michal Hocko
2019-10-04 13:56 ` Qian Cai
2019-10-04 13:56 ` Qian Cai
2019-10-04 14:41 ` Michal Hocko
2019-10-05 21:22 ` Andrew Morton
2019-10-05 22:38 ` Qian Cai
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