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ANDROID: vendor_hooks: vendor hook for MM

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2 Vendor hooks add:
    trace_android_vh_free_one_page_bypass
    trace_android_vh_rmqueue_smallest_bypass

Add vendor hook points in __free_one_page and __rmqueue to
manager some customized pages instead of freeing/allocating.

Bug: 286350069
Change-Id: If63e164c02a279f4f14ebd8603f49c58ba0fbc8a
Signed-off-by: chenzhiwei <chenzhiwei@xiaomi.corp-partner.google.com>
This commit is contained in:
chenzhiwei 2023-06-22 14:39:09 +08:00 • committed by Matthias Männich
parent 43d7226c5f
commit ff8496749d
3 changed files with 21 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

2
drivers/android/vendor_hooks.c
View file

@ -307,3 +307,5 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_init_aes_encrypt);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_skip_swap_map_write);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_post_image_save);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_madvise_cold_pageout_skip);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rmqueue_smallest_bypass);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_free_one_page_bypass);

7
include/trace/hooks/mm.h
View file

@ -122,6 +122,13 @@ DECLARE_HOOK(android_vh_mem_cgroup_css_online,
DECLARE_HOOK(android_vh_mem_cgroup_css_offline,
TP_PROTO(struct cgroup_subsys_state *css, struct mem_cgroup *memcg),
TP_ARGS(css, memcg));
DECLARE_HOOK(android_vh_rmqueue_smallest_bypass,
TP_PROTO(struct page **page, struct zone *zone, int order, int migratetype),
TP_ARGS(page, zone, order, migratetype));
DECLARE_HOOK(android_vh_free_one_page_bypass,
TP_PROTO(struct page *page, struct zone *zone, int order, int migratetype,
int fpi_flags, bool *bypass),
TP_ARGS(page, zone, order, migratetype, fpi_flags, bypass));
#endif /* _TRACE_HOOK_MM_H */

13
mm/page_alloc.c
View file

@ -1141,6 +1141,13 @@ static inline void __free_one_page(struct page *page,
unsigned long combined_pfn;
struct page *buddy;
bool to_tail;
bool bypass = false;
trace_android_vh_free_one_page_bypass(page, zone, order,
migratetype, (int)fpi_flags, &bypass);
if (bypass)
return;
VM_BUG_ON(!zone_is_initialized(zone));
VM_BUG_ON_PAGE(page->flags & PAGE_FLAGS_CHECK_AT_PREP, page);
@ -3129,7 +3136,11 @@ static __always_inline struct page *
__rmqueue(struct zone *zone, unsigned int order, int migratetype,
unsigned int alloc_flags)
{
struct page *page;
struct page *page = NULL;
trace_android_vh_rmqueue_smallest_bypass(&page, zone, order, migratetype);
if (page)
return page;
retry:
page = __rmqueue_smallest(zone, order, migratetype);