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ANDROID: mm: Add vendor hook in pagecache_get_page()

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Add a vendor hook for pagecache hit/miss and other
vendor specific functions.

Bug: 174088128
Bug: 172987241
Signed-off-by: Chiawei Wang <chiaweiwang@google.com>
Change-Id: Ie9f14a69a86b8ed81de766e44e30f2eba1d9bd84
This commit is contained in:
Chiawei Wang 2021-02-18 10:47:37 +08:00 committed by Suren Baghdasaryan
parent 369de37804
commit db158b4ae0
3 changed files with 11 additions and 1 deletions
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1
drivers/android/vendor_hooks.c
View File

@ -155,3 +155,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_iommu_setup_dma_ops);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_pick_next_entity);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_check_preempt_wakeup);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rmqueue);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_pagecache_get_page);

5
include/trace/hooks/mm.h
View File

@ -28,7 +28,10 @@ DECLARE_HOOK(android_vh_rmqueue,
unsigned int alloc_flags, int migratetype),
TP_ARGS(preferred_zone, zone, order,
gfp_flags, alloc_flags, migratetype));
DECLARE_HOOK(android_vh_pagecache_get_page,
TP_PROTO(struct address_space *mapping, pgoff_t index,
int fgp_flags, gfp_t gfp_mask, struct page *page),
TP_ARGS(mapping, index, fgp_flags, gfp_mask, page));
/* macro versions of hooks are no longer required */
#endif /* _TRACE_HOOK_MM_H */

6
mm/filemap.c
View File

@ -49,6 +49,9 @@
#define CREATE_TRACE_POINTS
#include <trace/events/filemap.h>
#undef CREATE_TRACE_POINTS
#include <trace/hooks/mm.h>
/*
* FIXME: remove all knowledge of the buffer layer from the core VM
*/
@ -1799,6 +1802,9 @@ struct page *pagecache_get_page(struct address_space *mapping, pgoff_t index,
page = find_get_entry(mapping, index);
if (xa_is_value(page))
page = NULL;
trace_android_vh_pagecache_get_page(mapping, index, fgp_flags,
gfp_mask, page);
if (!page)
goto no_page;