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ANDROID: vendor_hook: Add hook in __migration_entry_wait()

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android_vh_waiting_for_page_migration: provide a vendor hook
to force not to reclaim the page under migration to a specified
swap location, until the migration is finished.

Bug: 234214858
Signed-off-by: Bing Han <bing.han@transsion.com>
Change-Id: Iceeae91cbd912d9c44d7eac25f1299bbff547388
This commit is contained in:
Bing Han
2022-05-30 14:54:16 +08:00
committed by Treehugger Robot
parent f7c932399e
commit 89a247a638
3 changed files with 7 additions and 0 deletions
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1
drivers/android/vendor_hooks.c
View File

@@ -410,6 +410,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_tune_memcg_scan_type);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_handle_pte_fault_end); EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_handle_pte_fault_end);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_cow_user_page); EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_cow_user_page);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_swapin_add_anon_rmap); EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_swapin_add_anon_rmap);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_waiting_for_page_migration);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_page_isolated_for_reclaim); EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_page_isolated_for_reclaim);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_inactive_is_low); EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_inactive_is_low);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_snapshot_refaults); EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_snapshot_refaults);

3
include/trace/hooks/mm.h
View File

@@ -158,6 +158,9 @@ DECLARE_HOOK(android_vh_cow_user_page,
DECLARE_HOOK(android_vh_swapin_add_anon_rmap, DECLARE_HOOK(android_vh_swapin_add_anon_rmap,
TP_PROTO(struct vm_fault *vmf, struct page *page), TP_PROTO(struct vm_fault *vmf, struct page *page),
TP_ARGS(vmf, page)); TP_ARGS(vmf, page));
DECLARE_HOOK(android_vh_waiting_for_page_migration,
TP_PROTO(struct page *page),
TP_ARGS(page));
DECLARE_HOOK(android_vh_page_isolated_for_reclaim, DECLARE_HOOK(android_vh_page_isolated_for_reclaim,
TP_PROTO(struct mm_struct *mm, struct page *page), TP_PROTO(struct mm_struct *mm, struct page *page),
TP_ARGS(mm, page)); TP_ARGS(mm, page));

3
mm/migrate.c
View File

@@ -54,6 +54,8 @@
#define CREATE_TRACE_POINTS #define CREATE_TRACE_POINTS
#include <trace/events/migrate.h> #include <trace/events/migrate.h>
#undef CREATE_TRACE_POINTS
#include <trace/hooks/mm.h>
#include "internal.h" #include "internal.h"
@@ -311,6 +313,7 @@ void __migration_entry_wait(struct mm_struct *mm, pte_t *ptep,
if (!get_page_unless_zero(page)) if (!get_page_unless_zero(page))
goto out; goto out;
pte_unmap_unlock(ptep, ptl); pte_unmap_unlock(ptep, ptl);
trace_android_vh_waiting_for_page_migration(page);
put_and_wait_on_page_locked(page); put_and_wait_on_page_locked(page);
return; return;
out: out: