| From: |
| "Matthew Wilcox (Oracle)" <willy-AT-infradead.org> |
| To: |
| Vlastimil Babka <vbabka-AT-suse.cz>, Andrew Morton <akpm-AT-linux-foundation.org> |
| Subject: |
| [PATCH v3 00/17] Prepare slab for memdescs |
| Date: |
| Fri, 24 Oct 2025 21:44:15 +0100 |
| Message-ID: |
| <20251024204434.2461319-1-willy@infradead.org> |
| Cc: |
| "Matthew Wilcox (Oracle)" <willy-AT-infradead.org>, Christoph Lameter <cl-AT-gentwo.org>, David Rientjes <rientjes-AT-google.com>, Roman Gushchin <roman.gushchin-AT-linux.dev>, Harry Yoo <harry.yoo-AT-oracle.com>, linux-mm-AT-kvack.org |
| Archive-link: |
| Article |
When we separate struct folio, struct page and struct slab from each
other, converting to folios then to slabs will be nonsense. It made
sense under the 'folio is just a head page' interpretation, but with
full separation, page_folio() will return NULL for a page which belongs
to a slab.
This patch series removes almost all mentions of folio from slab.
There are a few folio_test_slab() invocations left around the tree that
I haven't decided how to handle yet. We're not yet quite at the point
of separately allocating struct slab, but that's what I'll be working
on next.
v3:
- Rebased on next-20251022
- Picked up review tags (thanks!)
Matthew Wilcox (Oracle) (17):
slab: Reimplement page_slab()
slab: Remove folio references from __ksize()
slab: Remove folio references in memcg_slab_post_charge()
slab: Remove folio references in slab alloc/free
slab: Remove folio references from ___kmalloc_large_node()
slab: Remove folio references from free_large_kmalloc()
slab: Remove folio references from kvfree_rcu_cb()
slab: Remove folio references from kvfree()
slab: Remove folio references from __do_krealloc()
slab: Remove folio references from build_detached_freelist()
slab: Remove dead code from free_large_kmalloc()
slab: Remove folio references from kfree_rcu_sheaf()
slab: Remove folio references from kfree_nolock()
usercopy: Remove folio references from check_heap_object()
memcg: Convert mem_cgroup_from_obj_folio() to
mem_cgroup_from_obj_slab()
kasan: Remove references to folio in __kasan_mempool_poison_object()
slab: Remove references to folios from virt_to_slab()
include/linux/page-flags.h | 16 +----
mm/kasan/common.c | 12 ++--
mm/kfence/core.c | 12 ++--
mm/memcontrol.c | 36 ++++------
mm/slab.h | 58 ++++++++--------
mm/slab_common.c | 29 ++++----
mm/slub.c | 138 ++++++++++++++++++-------------------
mm/usercopy.c | 21 +++---
8 files changed, 148 insertions(+), 174 deletions(-)
--
2.47.2
