xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ANDROID: mm: page_pinner: add state of page_pinner

Browse Source 
To keep track of page migration failures, record the following
page states to capture natural state transitions of a page during
migration:

  * detected
  * put reference count
  * free

With such transition change, it was a lot easier to analyze page
migration failure issues. Since we already have annotation on the
put_page side, this patch adds the record in free path and page
migration failure path.

Bug: 192475091
Signed-off-by: Minchan Kim <minchan@google.com>
Change-Id: I18182d3fd62850c5580c9e89a5362bdae630f153
This commit is contained in:
Minchan Kim
2021-07-11 12:44:33 -07:00
parent 3254948484
commit 13362ab28e
1 changed files with 3 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
mm/page_pinner.c
View File

@@ -174,6 +174,8 @@ void __reset_page_pinner(struct page *page, unsigned int order, bool free)
page_pinner = get_page_pinner(page_ext);
if (free) {
/* record page free call path */
__page_pinner_migration_failed(page);
atomic_set(&page_pinner->count, 0);
__clear_bit(PAGE_EXT_PINNER_MIGRATION_FAILED, &page_ext->flags);
} else {
@@ -363,6 +365,7 @@ void __page_pinner_mark_migration_failed_pages(struct list_head *page_list)
if (unlikely(!page_ext))
continue;
__set_bit(PAGE_EXT_PINNER_MIGRATION_FAILED, &page_ext->flags);
__page_pinner_migration_failed(page);
}
}