The patch titled Subject: alloc_tag: outline and export free_reserved_page() has been added to the -mm mm-hotfixes-unstable branch. Its filename is alloc_tag-outline-and-export-free_reserved_page.patch
This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...
This patch will later appear in the mm-hotfixes-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: Suren Baghdasaryan surenb@google.com Subject: alloc_tag: outline and export free_reserved_page() Date: Wed, 17 Jul 2024 14:28:44 -0700
Outline and export free_reserved_page() because modules use it and it in turn uses page_ext_{get|put} which should not be exported. The same result could be obtained by outlining {get|put}_page_tag_ref() but that would have higher performance impact as these functions are used in more performance critical paths.
Link: https://lkml.kernel.org/r/20240717212844.2749975-1-surenb@google.com Fixes: dcfe378c81f7 ("lib: introduce support for page allocation tagging") Signed-off-by: Suren Baghdasaryan surenb@google.com Reported-by: kernel test robot lkp@intel.com Closes: https://lore.kernel.org/oe-kbuild-all/202407080044.DWMC9N9I-lkp@intel.com/ Suggested-by: Christoph Hellwig hch@infradead.org Suggested-by: Vlastimil Babka vbabka@suse.cz Acked-by: Vlastimil Babka vbabka@suse.cz Cc: Kees Cook keescook@chromium.org Cc: Kent Overstreet kent.overstreet@linux.dev Cc: Pasha Tatashin pasha.tatashin@soleen.com Cc: Sourav Panda souravpanda@google.com Cc: stable@vger.kernel.org [6.10] Signed-off-by: Andrew Morton akpm@linux-foundation.org ---
include/linux/mm.h | 16 +--------------- mm/page_alloc.c | 17 +++++++++++++++++ 2 files changed, 18 insertions(+), 15 deletions(-)
--- a/include/linux/mm.h~alloc_tag-outline-and-export-free_reserved_page +++ a/include/linux/mm.h @@ -3177,21 +3177,7 @@ extern void reserve_bootmem_region(phys_ phys_addr_t end, int nid);
/* Free the reserved page into the buddy system, so it gets managed. */ -static inline void free_reserved_page(struct page *page) -{ - if (mem_alloc_profiling_enabled()) { - union codetag_ref *ref = get_page_tag_ref(page); - - if (ref) { - set_codetag_empty(ref); - put_page_tag_ref(ref); - } - } - ClearPageReserved(page); - init_page_count(page); - __free_page(page); - adjust_managed_page_count(page, 1); -} +void free_reserved_page(struct page *page); #define free_highmem_page(page) free_reserved_page(page)
static inline void mark_page_reserved(struct page *page) --- a/mm/page_alloc.c~alloc_tag-outline-and-export-free_reserved_page +++ a/mm/page_alloc.c @@ -5805,6 +5805,23 @@ unsigned long free_reserved_area(void *s return pages; }
+void free_reserved_page(struct page *page) +{ + if (mem_alloc_profiling_enabled()) { + union codetag_ref *ref = get_page_tag_ref(page); + + if (ref) { + set_codetag_empty(ref); + put_page_tag_ref(ref); + } + } + ClearPageReserved(page); + init_page_count(page); + __free_page(page); + adjust_managed_page_count(page, 1); +} +EXPORT_SYMBOL(free_reserved_page); + static int page_alloc_cpu_dead(unsigned int cpu) { struct zone *zone; _
Patches currently in -mm which might be from surenb@google.com are
alloc_tag-outline-and-export-free_reserved_page.patch