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ANDROID: mm: page_pinner: report test_page_isolation_failure

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Sometimes, alloc_contig_range fails at test_pages_isolated.
Report the failed page to page_pinner for tracking them to
be able to investigate it.

Bug: 192475091
Signed-off-by: Minchan Kim <minchan@google.com>
Change-Id: Ifcb913faa87a131915efd72848e6ca59c15b75b4
This commit is contained in:
Minchan Kim
2021-06-28 23:44:19 -07:00
parent 13362ab28e
commit dba79c3af3
2 changed files with 16 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
include/linux/page_pinner.h
View File

@@ -47,6 +47,14 @@ static inline void page_pinner_put_page(struct page *page)
__page_pinner_migration_failed(page);
}
static inline void page_pinner_failure_detect(struct page *page)
{
if (!static_branch_unlikely(&failure_tracking))
return;
__page_pinner_migration_failed(page);
}
static inline void page_pinner_mark_migration_failed_pages(struct list_head *page_list)
{
if (!static_branch_unlikely(&failure_tracking))
@@ -70,6 +78,9 @@ static inline void dump_page_pinner(struct page *page)
static inline void page_pinner_put_page(struct page *page)
{
}
static inline void page_pinner_failure_detect(struct page *page)
{
}
static inline void page_pinner_mark_migration_failed_pages(struct list_head *page_list)
{
}

6
mm/page_isolation.c
View File

@@ -308,6 +308,10 @@ int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn,
spin_unlock_irqrestore(&zone->lock, flags);
trace_test_pages_isolated(start_pfn, end_pfn, pfn);
if (pfn < end_pfn) {
page_pinner_failure_detect(pfn_to_page(pfn));
return -EBUSY;
}
return pfn < end_pfn ? -EBUSY : 0;
return 0;
}