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ANDROID: vendor hooks: Add hooks to adjust page alloc water mark

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When allocating memory, we can adjust the water level to open a fast
allocation channel for some important foreground processes, while
allowing less important background processes to wait.

Bug: 405889864

Change-Id: I71d709c8c782aa614d2c9e1d3150ce14a0106acb
Signed-off-by: Qianfeng Rong <rongqianfeng@vivo.corp-partner.google.com>
This commit is contained in:
Qianfeng Rong
2025-04-09 14:56:21 +08:00
committed by Suren Baghdasaryan
parent c23618753d
commit 1588efb8b0
3 changed files with 21 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/android/vendor_hooks.c
+2
View File
@@ -451,4 +451,6 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_mm_kcompactd_cpu_online);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_direct_reclaim_begin);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_direct_reclaim_end);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_do_read_fault);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_alloc_pages_reclaim_start);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_alloc_pages_reclaim_cycle_end);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_bd_link_disk_holder);
include/trace/hooks/mm.h
+9 -1
View File
@@ -399,7 +399,15 @@ DECLARE_HOOK(android_vh_customize_alloc_gfp,
DECLARE_HOOK(android_vh_mm_kcompactd_cpu_online,
TP_PROTO(int cpu),
TP_ARGS(cpu));
DECLARE_HOOK(android_rvh_alloc_pages_reclaim_start,
TP_PROTO(gfp_t gfp_mask, int order, int *alloc_flags),
TP_ARGS(gfp_mask, order, alloc_flags));
DECLARE_HOOK(android_rvh_alloc_pages_reclaim_cycle_end,
TP_PROTO(gfp_t gfp_mask, int order, int *alloc_flags,
unsigned long *did_some_progress, int *no_progress_loops,
unsigned long direct_reclaim_retries),
TP_ARGS(gfp_mask, order, alloc_flags, did_some_progress,
no_progress_loops, direct_reclaim_retries));
#endif /* _TRACE_HOOK_MM_H */
/* This part must be outside protection */
mm/page_alloc.c
+10
View File
@@ -4560,6 +4560,7 @@ __alloc_pages_slowpath(gfp_t gfp_mask, unsigned int order,
int retry_loop_count = 0;
u64 stime = 0;
bool should_alloc_retry = false;
unsigned long direct_reclaim_retries = 0;
if (unlikely(nofail)) {
/*
@@ -4622,6 +4623,9 @@ restart:
if (alloc_flags & ALLOC_KSWAPD)
wake_all_kswapds(order, gfp_mask, ac);
if (can_direct_reclaim && !direct_reclaim_retries && !(current->flags & PF_MEMALLOC))
trace_android_rvh_alloc_pages_reclaim_start(gfp_mask, order, &alloc_flags);
/*
* The adjusted alloc_flags might result in immediate success, so try
* that first
@@ -4731,6 +4735,9 @@ retry:
if (page)
goto got_pg;
if (direct_reclaim_retries < ULONG_MAX)
direct_reclaim_retries++;
/* Try direct reclaim and then allocating */
page = __alloc_pages_direct_reclaim(gfp_mask, order, alloc_flags, ac,
&did_some_progress);
@@ -4756,6 +4763,9 @@ retry:
!(gfp_mask & __GFP_RETRY_MAYFAIL)))
goto nopage;
trace_android_rvh_alloc_pages_reclaim_cycle_end(gfp_mask, order,
&alloc_flags, &did_some_progress, &no_progress_loops, direct_reclaim_retries);
if (should_reclaim_retry(gfp_mask, order, ac, alloc_flags,
did_some_progress > 0, &no_progress_loops))
goto retry;