From: "David Hildenbrand (Arm)" <david@kernel.org>
To: "Mike Rapoport (Microsoft)" <rppt@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Alexander Potapenko <glider@google.com>,
Marco Elver <elver@google.com>,
"Rafael J. Wysocki" <rafael@kernel.org>
Cc: Dmitry Vyukov <dvyukov@google.com>, Len Brown <lenb@kernel.org>,
Pavel Machek <pavel@kernel.org>,
kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, linux-pm@vger.kernel.org
Subject: Re: [PATCH 3/5] hibernate: handle potential errors in hibernate_{map,unmap}_page()
Date: Wed, 23 Sep 2026 12:13:39 +0200 [thread overview]
Message-ID: <5271866c-a334-453b-a95c-8bfbede1232b@kernel.org> (raw)
In-Reply-To: <20260917-hibernation-v1-3-7f7dfae3dbe0@kernel.org>
On 9/17/26 08:07, Mike Rapoport (Microsoft) wrote:
> When safe_copy_page() had to map/unmap pages only because of
> debug_pagealloc() there could be no errors in the kernel page table
> updates.
>
> However, with the increasing desire to remove pages from the direct map
> this assumption becomes a real stretch.
What's our general direction in that regard?
I'd assume we'd not want to modify the directmap from hibernation code and
simply fail instead if we encounter that scenario.
--
Cheers,
David
next prev parent reply other threads:[~2026-09-23 10:13 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-17 6:07 [PATCH 0/5] hibernation: make safe_copy_page more robust and remove debug_pagealloc support Mike Rapoport (Microsoft)
2026-09-17 6:07 ` [PATCH 1/5] hibernation: make swsusp_page helpers static Mike Rapoport (Microsoft)
2026-09-23 10:08 ` David Hildenbrand (Arm)
2026-09-17 6:07 ` [PATCH 2/5] hibernation: ensure secretmem pages don't reach a snapshot Mike Rapoport (Microsoft)
2026-09-23 10:10 ` David Hildenbrand (Arm)
2026-09-23 15:38 ` Mike Rapoport
2026-09-17 6:07 ` [PATCH 3/5] hibernate: handle potential errors in hibernate_{map,unmap}_page() Mike Rapoport (Microsoft)
2026-09-23 10:13 ` David Hildenbrand (Arm) [this message]
2026-09-23 15:42 ` Mike Rapoport
2026-09-24 8:16 ` David Hildenbrand (Arm)
2026-09-17 6:07 ` [PATCH 4/5] hibernation, KFENCE: explicitly map/unmap KFENCE pages Mike Rapoport (Microsoft)
2026-09-23 10:31 ` David Hildenbrand (Arm)
2026-09-23 15:49 ` Mike Rapoport
2026-09-24 8:19 ` David Hildenbrand (Arm)
2026-09-24 16:02 ` Mike Rapoport
2026-09-24 18:49 ` David Hildenbrand (Arm)
2026-09-25 9:33 ` Mike Rapoport
2026-09-25 11:00 ` David Hildenbrand (Arm)
2026-09-17 6:07 ` [PATCH 5/5] hibernation: make hibernation unavailable when debug_pagealloc is on Mike Rapoport (Microsoft)
2026-09-23 10:24 ` David Hildenbrand (Arm)
2026-09-23 9:26 ` [PATCH 0/5] hibernation: make safe_copy_page more robust and remove debug_pagealloc support Mike Rapoport
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