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ANDROID: vendor_hooks: Add hooks to for alloc_contig_range

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Provide a vendor hook to allow drain_all_pages to be skipped
during alloc_contig_range in some cases to avoid delays caused by
it in cases when the benefits of draining pcp lists are known
to be small.

Bug: 224732340
Bug: 234405962
Signed-off-by: Peifeng Li <lipeifeng@oppo.com>
Change-Id: I0a82f668cf985ad5344d666c0c6372a7e61c3798
This commit is contained in:
Peifeng Li
2022-03-15 21:24:08 +08:00
committed by Carlos Llamas
parent 8c19c1e07e
commit a82943cdfb
3 changed files with 9 additions and 1 deletions
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1
drivers/android/vendor_hooks.c
View File

@@ -211,6 +211,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_set_balance_anon_file_reclaim);
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_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

@@ -30,6 +30,9 @@ DECLARE_HOOK(android_vh_drain_all_pages_bypass,
int migratetype, unsigned long did_some_progress,
bool *bypass),
TP_ARGS(gfp_mask, order, alloc_flags, migratetype, did_some_progress, bypass));
DECLARE_HOOK(android_vh_cma_drain_all_pages_bypass,
TP_PROTO(unsigned int migratetype, bool *bypass),
TP_ARGS(migratetype, bypass));
#endif /* _TRACE_HOOK_MM_H */

6
mm/page_alloc.c
View File

@@ -9155,6 +9155,7 @@ int alloc_contig_range(unsigned long start, unsigned long end,
unsigned long outer_start, outer_end;
unsigned int order;
int ret = 0;
bool skip_drain_all_pages = false;
struct compact_control cc = {
.nr_migratepages = 0,
@@ -9197,7 +9198,10 @@ int alloc_contig_range(unsigned long start, unsigned long end,
if (ret)
return ret;
drain_all_pages(cc.zone);
trace_android_vh_cma_drain_all_pages_bypass(migratetype,
&skip_drain_all_pages);
if (skip_drain_all_pages)
drain_all_pages(cc.zone);
/*
* In case of -EBUSY, we'd like to know which page causes problem.