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ANDROID: vendor_hooks: Add hooks to for free_unref_page_commit

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Provide a vendor hook to skip cma-pages to add in pcplist when
free_unref_page_commit.

The patch is revelant to skip drain_all_pages in alloc_contig_range,
the revelant hooks is android_vh_cma_drain_all_pages_bypass
which is to avoid to delay in drain pcppages when drain_all_pages.

In most case, pcp->high is small so that free-pages with other mt_types
can also fill with pcplist full.

Bug: 224732340
Bug: 234405962
Signed-off-by: Peifeng Li <lipeifeng@oppo.com>
Change-Id: Ifdeeed9f8934d87671ec3fa6787a02675b993082
This commit is contained in:
Peifeng Li
2022-03-26 20:43:40 +08:00
committed by Carlos Llamas
parent c46b91c287
commit 998b760798
3 changed files with 14 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/android/vendor_hooks.c
View File

@@ -212,6 +212,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_show_max_freq);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_page_referenced_check_bypass);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_drain_all_pages_bypass);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_cma_drain_all_pages_bypass);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_pcplist_add_cma_pages_bypass);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_free_task);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_after_enqueue_task);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_after_dequeue_task);

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

@@ -33,6 +33,9 @@ DECLARE_HOOK(android_vh_drain_all_pages_bypass,
DECLARE_HOOK(android_vh_cma_drain_all_pages_bypass,
TP_PROTO(unsigned int migratetype, bool *bypass),
TP_ARGS(migratetype, bypass));
DECLARE_HOOK(android_vh_pcplist_add_cma_pages_bypass,
TP_PROTO(int migratetype, bool *bypass),
TP_ARGS(migratetype, bypass));
#endif /* _TRACE_HOOK_MM_H */

12
mm/page_alloc.c
View File

@@ -3508,6 +3508,7 @@ void free_unref_page(struct page *page, unsigned int order)
unsigned long flags;
unsigned long pfn = page_to_pfn(page);
int migratetype;
bool pcp_skip_cma_pages = false;
if (!free_unref_page_prepare(page, pfn, order))
return;
@@ -3521,7 +3522,10 @@ void free_unref_page(struct page *page, unsigned int order)
*/
migratetype = get_pcppage_migratetype(page);
if (unlikely(migratetype >= MIGRATE_PCPTYPES)) {
if (unlikely(is_migrate_isolate(migratetype))) {
trace_android_vh_pcplist_add_cma_pages_bypass(migratetype,
&pcp_skip_cma_pages);
if (unlikely(is_migrate_isolate(migratetype)) ||
pcp_skip_cma_pages) {
free_one_page(page_zone(page), page, pfn, order, migratetype, FPI_NONE);
return;
}
@@ -3542,6 +3546,7 @@ void free_unref_page_list(struct list_head *list)
unsigned long flags, pfn;
int batch_count = 0;
int migratetype;
bool pcp_skip_cma_pages = false;
/* Prepare pages for freeing */
list_for_each_entry_safe(page, next, list, lru) {
@@ -3556,7 +3561,10 @@ void free_unref_page_list(struct list_head *list)
* comment in free_unref_page.
*/
migratetype = get_pcppage_migratetype(page);
if (unlikely(is_migrate_isolate(migratetype))) {
trace_android_vh_pcplist_add_cma_pages_bypass(migratetype,
&pcp_skip_cma_pages);
if (unlikely(is_migrate_isolate(migratetype)) ||
pcp_skip_cma_pages) {
list_del(&page->lru);
free_one_page(page_zone(page), page, pfn, 0, migratetype, FPI_NONE);
continue;