Re: [PATCH 2/5] mm: rmap: add a ZONE_DEVICE folio warning in folio_referenced()
From: Rik van Riel <riel@surriel.com>
Date: 2026-02-24 02:39:48
Also in:
linux-mm, lkml
On Tue, 2026-02-24 at 09:56 +0800, Baolin Wang wrote:
quoted hunk ↗ jump to hunk
diff --git a/mm/rmap.c b/mm/rmap.c index bff8f222004e..be785dfc9336 100644 --- a/mm/rmap.c +++ b/mm/rmap.c@@ -1065,6 +1065,7 @@ int folio_referenced(struct folio *folio, intis_locked, .invalid_vma = invalid_folio_referenced_vma, }; + VM_WARN_ON_FOLIO(folio_is_zone_device(folio), folio); *vm_flags = 0; if (!pra.mapcount) return 0;
Should be a VM_WARN_ON_ONCE_FOLIO so we do not cause a softlockup if we try to print information about a million ZONE_DEVICE pages? -- All Rights Reversed.