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ANDROID: restricted vendor_hook: add swap_read_folio_bdev_sync

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Add restricted vendor hook to optimize the swap-in latency.

Rename swap_readpage_bdev_sync to swap_read_folio_bdev_sync to align
with the upstream function name.

Bug: 436973821
(cherry picked from commit 6d61bc2d2d7fcb6e4eef25e5182563b0ae79e4c3)
Change-Id: I1a2be1a309769590cb427e13762e29d8c8fa9cf6
Signed-off-by: Richard Chang <richardycc@google.com>
This commit is contained in:
Richard Chang
2025-07-02 07:16:49 +00:00
committed by Minchan Kim
parent 7c4c173a5f
commit cb29206296
3 changed files with 14 additions and 0 deletions
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drivers/android/vendor_hooks.c
+1
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@@ -571,6 +571,7 @@ 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);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_swap_read_folio_bdev_sync);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_shrink_node_memcgs);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_mmap_region);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_try_to_unmap_one);
include/trace/hooks/mm.h
+4
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@@ -538,6 +538,10 @@ DECLARE_HOOK(android_vh_shmem_swapin_folio,
DECLARE_HOOK(android_vh_swap_writepage,
TP_PROTO(unsigned long *sis_flags, struct page *page),
TP_ARGS(sis_flags, page));
DECLARE_RESTRICTED_HOOK(android_rvh_swap_read_folio_bdev_sync,
TP_PROTO(struct block_device *bdev, sector_t sector,
struct page *page, bool *read),
TP_ARGS(bdev, sector, page, read), 4);
DECLARE_HOOK(android_vh_mmap_region,
TP_PROTO(struct vm_area_struct *vma, unsigned long addr),
TP_ARGS(vma, addr));
mm/page_io.c
+9
View File
@@ -583,6 +583,15 @@ static void swap_read_folio_bdev_sync(struct folio *folio,
{
struct bio_vec bv;
struct bio bio;
bool read = false;
trace_android_rvh_swap_read_folio_bdev_sync(sis->bdev,
swap_folio_sector(folio) + get_start_sect(sis->bdev),
&folio->page, &read);
if (read) {
count_vm_events(PSWPIN, folio_nr_pages(folio));
return;
}
bio_init(&bio, sis->bdev, &bv, 1, REQ_OP_READ);
bio.bi_iter.bi_sector = swap_folio_sector(folio);