From: "Christoph Lameter (Ampere)" <cl@gentwo.org>
To: Vlastimil Babka <vbabka@suse.cz>
Cc: Matthew Wilcox <willy@infradead.org>,
Harry Yoo <harry.yoo@oracle.com>,
Andrew Morton <akpm@linux-foundation.org>,
David Rientjes <rientjes@google.com>,
Roman Gushchin <roman.gushchin@linux.dev>,
linux-mm@kvack.org
Subject: Re: [PATCH 03/22] slab: Remove dead code in check_slab()
Date: Wed, 10 Sep 2025 15:11:58 -0700 (PDT) [thread overview]
Message-ID: <10360dad-e168-8e95-4ea0-9071702a540d@gentwo.org> (raw)
In-Reply-To: <d82c935e-1569-4ba7-9e9e-13b22dc2e4e5@suse.cz>
On Wed, 10 Sep 2025, Vlastimil Babka wrote:
> However once struct slab stop overlaying struct page/folio then we simply
> can't have this validation via page/folio flag anymore, so it's fine to
> remove it. Maybe there will be a different way to reintroduce something
> similar in the memdesc world.
Why not? The partial list will continue to exist and the metadata of the
slab pages needs to be in order regardless of where the struct slab or
struct page has been allocated.
validate_slab() checks the freelist of slabs, and the metadata of each
object in thoses slabs and does print a list of inconsistencies. It fixes
issues with individual objects and freelists in those slabs but does not
remove the slab from the partial list.
next prev parent reply other threads:[~2025-09-10 22:12 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-29 15:47 [PATCH 00/22] Prepare slab for memdescs Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 01/22] slab: Remove unnecessary test from alloc_debug_processing() Matthew Wilcox (Oracle)
2025-09-10 10:53 ` Harry Yoo
2025-08-29 15:47 ` [PATCH 02/22] slab: Remove unnecessary test from alloc_single_from_partial() Matthew Wilcox (Oracle)
2025-09-10 10:56 ` Harry Yoo
2025-08-29 15:47 ` [PATCH 03/22] slab: Remove dead code in check_slab() Matthew Wilcox (Oracle)
2025-09-10 11:21 ` Harry Yoo
2025-09-10 11:39 ` Matthew Wilcox
2025-09-10 21:12 ` Vlastimil Babka
2025-09-10 22:11 ` Christoph Lameter (Ampere) [this message]
2025-09-11 9:05 ` Harry Yoo
2025-08-29 15:47 ` [PATCH 04/22] slab: Remove dead code in free_consistency_checks() Matthew Wilcox (Oracle)
2025-09-10 11:07 ` Harry Yoo
2025-08-29 15:47 ` [PATCH 05/22] mm: Constify compound_order() and page_size() Matthew Wilcox (Oracle)
2025-08-29 20:42 ` Zi Yan
2025-08-29 22:53 ` Matthew Wilcox
2025-08-31 1:06 ` Zi Yan
2025-09-01 15:45 ` David Hildenbrand
2025-08-29 15:47 ` [PATCH 06/22] slab: Reimplement page_slab() Matthew Wilcox (Oracle)
2025-09-01 15:50 ` David Hildenbrand
2025-08-29 15:47 ` [PATCH 07/22] slab: Remove folio references from __ksize() Matthew Wilcox (Oracle)
2025-09-03 5:23 ` Matthew Wilcox
2025-09-10 11:42 ` Matthew Wilcox
2025-08-29 15:47 ` [PATCH 08/22] slab: Remove folio references in memcg_slab_post_charge() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 09/22] slab: Remove folio references in slab alloc/free Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 10/22] slab: Remove folio references from ___kmalloc_large_node() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 11/22] slab: Remove folio references from free_large_kmalloc() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 12/22] slab: Remove folio references from kvfree_rcu_cb() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 13/22] slab: Remove folio references from kvfree() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 14/22] slab: Remove folio references from __do_krealloc() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 15/22] slab: Remove folio references from build_detached_freelist() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 16/22] slab: Remove dead code from free_large_kmalloc() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 17/22] slab: Remove folio references from kfree_rcu_sheaf() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 18/22] usercopy: Remove folio references from check_heap_object() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 19/22] memcg: Convert mem_cgroup_from_obj_folio() to mem_cgroup_from_obj_slab() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 20/22] kasan: Remove references to folio in __kasan_mempool_poison_object() Matthew Wilcox (Oracle)
2025-09-01 15:47 ` David Hildenbrand
2025-08-29 15:47 ` [PATCH 21/22] slab: Remove references to folios from virt_to_slab() Matthew Wilcox (Oracle)
2025-08-29 15:47 ` [PATCH 22/22] mm: Remove redundant test in validate_page_before_insert() Matthew Wilcox (Oracle)
2025-09-01 15:46 ` David Hildenbrand
2025-08-29 17:05 ` [PATCH 00/22] Prepare slab for memdescs Matthew Wilcox
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