From: Christoph Lameter <cl@gentwo.org>
To: Michal Hocko <mhocko@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@redhat.com>,
Alexey Makhalov <amakhalov@vmware.com>,
LKML <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org, Dennis Zhou <dennis@kernel.org>,
Eric Dumazet <eric.dumazet@gmail.com>,
Oscar Salvador <osalvador@suse.de>, Tejun Heo <tj@kernel.org>,
Nico Pache <npache@redhat.com>, Michal Hocko <mhocko@suse.com>
Subject: Re: [PATCH v2 2/4] mm: handle uninitialized numa nodes gracefully
Date: Tue, 14 Dec 2021 11:33:41 +0100 (CET) [thread overview]
Message-ID: <alpine.DEB.2.22.394.2112141131180.370323@gentwo.de> (raw)
In-Reply-To: <20211214100732.26335-3-mhocko@kernel.org>
On Tue, 14 Dec 2021, Michal Hocko wrote:
> This patch takes a different approach (following a lead of [3]) and it
> pre allocates pgdat for all possible nodes in an arch indipendent code
> - free_area_init. All uninitialized nodes are treated as memoryless
> nodes. node_state of the node is not changed because that would lead to
> other side effects - e.g. sysfs representation of such a node and from
> past discussions [4] it is known that some tools might have problems
> digesting that.
Would it be possible to define a pgdat statically and place it in read
only memory? Populate with values that ensure that the page allocator
does not blow up but does a defined fallback.
Point the pgdat for all nodes not online to that readonly pgdat?
Maybe that would save some memory. When the node comes online then a real
pgdat could be allocated.
next prev parent reply other threads:[~2021-12-14 10:33 UTC|newest]
Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-01 20:13 [PATCH] mm: fix panic in __alloc_pages Alexey Makhalov
2021-11-01 20:38 ` Matthew Wilcox
2021-11-02 7:47 ` Michal Hocko
2021-11-02 8:12 ` David Hildenbrand
2021-11-02 8:48 ` Alexey Makhalov
2021-11-02 9:04 ` Michal Hocko
2021-11-02 9:24 ` David Hildenbrand
2021-11-02 10:34 ` Alexey Makhalov
2021-11-02 11:00 ` David Hildenbrand
2021-11-02 11:44 ` Michal Hocko
2021-11-02 12:06 ` David Hildenbrand
2021-11-02 12:27 ` Michal Hocko
2021-11-02 12:39 ` David Hildenbrand
2021-11-02 13:25 ` Michal Hocko
2021-11-02 13:41 ` David Hildenbrand
2021-11-02 14:12 ` Michal Hocko
2021-11-02 14:44 ` David Hildenbrand
2021-11-02 13:52 ` Oscar Salvador
2021-11-02 14:35 ` Michal Hocko
2021-11-08 6:12 ` Alexey Makhalov
2021-11-08 6:36 ` [PATCH v2] " Alexey Makhalov
2021-11-08 8:32 ` David Hildenbrand
2021-11-08 20:23 ` [PATCH v3] " Alexey Makhalov
2021-11-09 2:08 ` Eric Dumazet
2021-11-09 7:03 ` David Hildenbrand
2021-11-09 16:55 ` Eric Dumazet
2021-11-09 17:15 ` Michal Hocko
2021-11-09 19:06 ` Dennis Zhou
2021-11-09 19:54 ` Michal Hocko
2021-11-16 1:31 ` Alexey Makhalov
2021-11-16 9:17 ` Michal Hocko
2021-11-16 20:22 ` Alexey Makhalov
2021-11-18 8:35 ` Michal Hocko
2021-12-07 10:54 ` Michal Hocko
2021-12-07 11:08 ` David Hildenbrand
2021-12-07 12:13 ` Michal Hocko
2021-12-07 12:28 ` David Hildenbrand
2021-12-07 13:23 ` Michal Hocko
2021-12-07 15:09 ` David Hildenbrand
2021-12-07 15:29 ` Michal Hocko
2021-12-07 15:34 ` David Hildenbrand
2021-12-07 15:56 ` Michal Hocko
2021-12-07 16:09 ` David Hildenbrand
2021-12-07 16:27 ` Michal Hocko
2021-12-07 16:36 ` Michal Hocko
2021-12-07 16:40 ` David Hildenbrand
2021-12-08 8:28 ` Michal Hocko
2021-12-07 17:02 ` Alexey Makhalov
2021-12-07 17:13 ` David Hildenbrand
2021-12-07 17:17 ` Alexey Makhalov
2021-12-07 18:03 ` David Hildenbrand
2021-12-08 8:12 ` Michal Hocko
2021-12-08 8:24 ` David Hildenbrand
2021-12-08 8:34 ` Michal Hocko
2021-12-08 8:38 ` David Hildenbrand
2021-12-08 8:04 ` Michal Hocko
2021-12-08 8:19 ` Alexey Makhalov
2021-12-08 8:30 ` Michal Hocko
2021-12-08 8:54 ` Michal Hocko
2021-12-08 8:57 ` Alexey Makhalov
2021-12-08 9:55 ` Michal Hocko
2021-12-09 2:16 ` Alexey Makhalov
2021-12-09 8:46 ` Michal Hocko
2021-12-09 9:28 ` Alexey Makhalov
2021-12-09 9:56 ` Michal Hocko
2021-12-09 10:23 ` Alexey Makhalov
2021-12-09 13:29 ` Michal Hocko
2021-12-09 19:01 ` Alexey Makhalov
2021-12-10 9:11 ` Michal Hocko
2021-12-17 12:53 ` Michal Hocko
2021-12-21 5:46 ` Alexey Makhalov
2021-12-21 9:46 ` Michal Hocko
2021-12-21 20:23 ` Alexey Makhalov
2021-12-22 11:41 ` Michal Hocko
2021-12-09 10:48 ` Michal Hocko
2021-12-13 15:06 ` Michal Hocko
2021-12-13 15:07 ` David Hildenbrand
2021-12-14 8:38 ` Michal Hocko
2021-12-14 10:07 ` [PATCH v2 0/4] mm, memory_hotplug: handle unitialized numa node gracefully Michal Hocko
2021-12-14 10:07 ` [PATCH v2 1/4] mm, memory_hotplug: make arch_alloc_nodedata independent on CONFIG_MEMORY_HOTPLUG Michal Hocko
2021-12-14 10:07 ` [PATCH v2 2/4] mm: handle uninitialized numa nodes gracefully Michal Hocko
2021-12-14 10:33 ` Christoph Lameter [this message]
2021-12-14 10:38 ` Michal Hocko
2022-01-14 0:24 ` Wei Yang
2022-01-14 10:01 ` Michal Hocko
2021-12-15 4:47 ` kernel test robot
2021-12-15 4:47 ` kernel test robot
2021-12-15 10:12 ` Michal Hocko
2021-12-15 10:12 ` Michal Hocko
2021-12-14 10:07 ` [PATCH v2 3/4] mm, memory_hotplug: drop arch_free_nodedata Michal Hocko
2021-12-14 10:07 ` [PATCH v2 4/4] mm, memory_hotplug: reorganize new pgdat initialization Michal Hocko
2021-12-17 14:51 ` [PATCH v2 0/4] mm, memory_hotplug: handle unitialized numa node gracefully David Hildenbrand
2021-12-21 9:51 ` Michal Hocko
2022-01-02 7:14 ` Mike Rapoport
2022-01-10 17:16 ` Michal Hocko
2022-01-10 21:16 ` Rafael Aquini
2022-01-11 8:34 ` Michal Hocko
2021-11-08 10:37 ` [PATCH v2] mm: fix panic in __alloc_pages Michal Hocko
2021-11-02 9:40 ` [PATCH] " Alexey Makhalov
2021-11-02 9:40 ` Michal Hocko
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