From: Michal Hocko <mhocko@kernel.org>
To: Qian Cai <cai@lca.pw>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>,
linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
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: Fri, 4 Oct 2019 15:07:13 +0200 [thread overview]
Message-ID: <20191004130713.GK9578@dhcp22.suse.cz> (raw)
In-Reply-To: <1570193776.5576.270.camel@lca.pw>
On Fri 04-10-19 08:56:16, Qian Cai wrote:
[...]
> It might be a good time to rethink if it is really a good idea to dump_page()
> at all inside has_unmovable_pages(). As it is right now, it is a a potential
> deadlock between console vs memory offline. More details are in this thread,
>
> https://lore.kernel.org/lkml/1568817579.5576.172.camel@lca.pw/
Huh. That would imply we cannot do any printk from that path, no?
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2019-10-04 13:07 UTC|newest]
Thread overview: 29+ 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
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 13:07 ` Michal Hocko [this message]
2019-10-04 13:30 ` Qian Cai
2019-10-04 13:38 ` Michal Hocko
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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