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ANDROID: vendor_hooks: Add vendor hooks in __swap_writepage

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Add hook in __swap_writepage for reclaim synchronous or asynchronous in different scenarios.

Bug: 363882594
Change-Id: I06604454fa3019850a499912f6def97525960c0f
Signed-off-by: Jiewen Wang <jiewen.wang@vivo.com>
This commit is contained in:
Jiewen Wang
2024-09-02 14:36:56 +08:00
committed by Treehugger Robot
parent 7669d436d7
commit 8f5f6798e1
3 changed files with 12 additions and 2 deletions
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1
drivers/android/vendor_hooks.c
View File

@@ -550,3 +550,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_do_wp_page);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_do_swap_page);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_do_anonymous_page);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_uprobes_replace_page);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_swap_writepage);

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

@@ -513,6 +513,9 @@ DECLARE_HOOK(android_vh_uprobes_replace_page,
DECLARE_HOOK(android_vh_shmem_swapin_folio,
TP_PROTO(struct folio *folio),
TP_ARGS(folio));
DECLARE_HOOK(android_vh_swap_writepage,
TP_PROTO(unsigned long *sis_flags, struct page *page),
TP_ARGS(sis_flags, page));
#endif /* _TRACE_HOOK_MM_H */
/* This part must be outside protection */

10
mm/page_io.c
View File

@@ -27,6 +27,9 @@
#include <linux/zswap.h>
#include "swap.h"
#undef CREATE_TRACE_POINTS
#include <trace/hooks/mm.h>
static void __end_swap_bio_write(struct bio *bio)
{
struct folio *folio = bio_first_folio_all(bio);
@@ -452,6 +455,7 @@ static void swap_writepage_bdev_async(struct folio *folio,
void __swap_writepage(struct folio *folio, struct writeback_control *wbc)
{
struct swap_info_struct *sis = swp_swap_info(folio->swap);
unsigned long sis_flags = 0;
VM_BUG_ON_FOLIO(!folio_test_swapcache(folio), folio);
/*
@@ -459,14 +463,16 @@ void __swap_writepage(struct folio *folio, struct writeback_control *wbc)
* but that will never affect SWP_FS_OPS, so the data_race
* is safe.
*/
if (data_race(sis->flags & SWP_FS_OPS))
sis_flags = data_race(sis->flags);
trace_android_vh_swap_writepage(&sis_flags, &folio->page);
if (sis_flags & SWP_FS_OPS)
swap_writepage_fs(folio, wbc);
/*
* ->flags can be updated non-atomicially (scan_swap_map_slots),
* but that will never affect __SWP_WRITE_SYNCHRONOUS_IO, so the data_race
* is safe.
*/
else if (data_race(sis->flags & __SWP_WRITE_SYNCHRONOUS_IO))
else if (sis_flags & __SWP_WRITE_SYNCHRONOUS_IO)
swap_writepage_bdev_sync(folio, wbc, sis);
else
swap_writepage_bdev_async(folio, wbc, sis);