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ANDROID: mm: add vendor hook in free_unref_folios and free_unref_page

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A vendor hook to bypass free_one_page() via __free_pages_ok() was added
via https://android-review.googlesource.com/c/kernel/common/+/3458032 for
vendor modules to hook pages on certain conditions to use later instead
of freeing pages directly.

In kernel v6.12, for same purpose, free_unref_folios() and free_unref_page()
path also needs same vendor hook to bypass free_one_page().

Bug: 410432482
Change-Id: I1863eb497eee796903b483a3a9f8808ab372b475
Signed-off-by: Sooyong Suk <s.suk@samsung.corp-partner.google.com>
This commit is contained in:
Sooyong Suk
2025-07-23 13:06:46 +09:00
committed by Treehugger Robot
parent f4ada86fbb
commit daadcbc8a2
3 changed files with 18 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/android/vendor_hooks.c
+2
View File
@@ -454,6 +454,8 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_madvise_pageout_bypass);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_madvise_cold_or_pageout_abort);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_free_pages_prepare_bypass);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_free_pages_ok_bypass);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_free_page_bypass);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_free_folio_bypass);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_split_large_folio_bypass);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_page_should_be_protected);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_page_referenced_check_bypass);
include/trace/hooks/mm.h
+6
View File
@@ -346,6 +346,12 @@ DECLARE_HOOK(android_vh_free_pages_ok_bypass,
TP_PROTO(struct page *page, unsigned int order,
int __bitwise flags, bool *skip_free_pages_ok),
TP_ARGS(page, order, flags, skip_free_pages_ok));
DECLARE_HOOK(android_vh_free_page_bypass,
TP_PROTO(struct page *page, unsigned int order, bool *skip_free_page),
TP_ARGS(page, order, skip_free_page));
DECLARE_HOOK(android_vh_free_folio_bypass,
TP_PROTO(struct folio *folio, unsigned int order, bool *skip_free_folio),
TP_ARGS(folio, order, skip_free_folio));
DECLARE_HOOK(android_vh_free_pages_prepare_init,
TP_PROTO(struct page *page, int nr_pages, bool *init),
TP_ARGS(page, nr_pages, init));
mm/page_alloc.c
+10
View File
@@ -2797,6 +2797,7 @@ void free_unref_page(struct page *page, unsigned int order)
unsigned long pfn = page_to_pfn(page);
int migratetype;
bool skip_free_unref_page = false;
bool skip_free_page = false;
if (!pcp_allowed_order(order)) {
__free_pages_ok(page, order, FPI_NONE);
@@ -2806,6 +2807,9 @@ void free_unref_page(struct page *page, unsigned int order)
if (!free_pages_prepare(page, order))
return;
trace_android_vh_free_page_bypass(page, order, &skip_free_page);
if (skip_free_page)
return;
/*
* We only track unmovable, reclaimable, movable and if restrict cma
* fallback flag is set, CMA on pcp lists.
@@ -2857,9 +2861,15 @@ void free_unref_folios(struct folio_batch *folios)
struct folio *folio = folios->folios[i];
unsigned long pfn = folio_pfn(folio);
unsigned int order = folio_order(folio);
bool skip_free_folio = false;
if (!free_pages_prepare(&folio->page, order))
continue;
trace_android_vh_free_folio_bypass(folio, order,
&skip_free_folio);
if (skip_free_folio)
continue;
/*
* Free orders not handled on the PCP directly to the
* allocator.