The patch titled
Subject: slub: remove use of page->flags
has been added to the -mm mm-unstable branch. Its filename is
slub-remove-use-of-page-flags.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/slub-remove-use-of-page-flags.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: slub: remove use of page->flags
Date: Tue, 26 Mar 2024 17:10:30 +0000
Use slub->__page_flags instead. We can also remove the assertion that
it's not a tail page as struct slab never points to a tail page.
Link: https://lkml.kernel.org/r/20240326171045.410737-9-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/slub.c | 10 ++--------
1 file changed, 2 insertions(+), 8 deletions(-)
--- a/mm/slub.c~slub-remove-use-of-page-flags
+++ a/mm/slub.c
@@ -616,18 +616,12 @@ slub_set_cpu_partial(struct kmem_cache *
*/
static __always_inline void slab_lock(struct slab *slab)
{
- struct page *page = slab_page(slab);
-
- VM_BUG_ON_PAGE(PageTail(page), page);
- bit_spin_lock(PG_locked, &page->flags);
+ bit_spin_lock(PG_locked, &slab->__page_flags);
}
static __always_inline void slab_unlock(struct slab *slab)
{
- struct page *page = slab_page(slab);
-
- VM_BUG_ON_PAGE(PageTail(page), page);
- bit_spin_unlock(PG_locked, &page->flags);
+ bit_spin_unlock(PG_locked, &slab->__page_flags);
}
static inline bool
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
mm-always-initialise-folio-_deferred_list.patch
mm-create-folio_flag_false-and-folio_type_ops-macros.patch
mm-remove-folio_prep_large_rmappable.patch
mm-support-page_mapcount-on-page_has_type-pages.patch
mm-turn-folio_test_hugetlb-into-a-pagetype.patch
mm-turn-folio_test_hugetlb-into-a-pagetype-fix.patch
mm-remove-a-call-to-compound_head-from-is_page_hwpoison.patch
mm-free-up-pg_slab.patch
mm-free-up-pg_slab-fix.patch
mm-improve-dumping-of-mapcount-and-page_type.patch
hugetlb-remove-mention-of-destructors.patch
sh-remove-use-of-pg_arch_1-on-individual-pages.patch
xtensa-remove-uses-of-pg_arch_1-on-individual-pages.patch
mm-make-page_ext_get-take-a-const-argument.patch
mm-make-folio_test_idle-and-folio_test_young-take-a-const-argument.patch
mm-make-is_free_buddy_page-take-a-const-argument.patch
mm-make-page_mapped-take-a-const-argument.patch
mm-convert-arch_clear_hugepage_flags-to-take-a-folio.patch
slub-remove-use-of-page-flags.patch
remove-references-to-page-flags-in-documentation.patch
proc-rewrite-stable_page_flags.patch
