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ANDROID: vendor_hooks: Add hooks for reducing virtual address fragmentation

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When running 32-bit apps for a long time, virtual address becomes fragmented which can lead to allocation failures when a large virtually-contiguous area is requested.
Add hooks to implement pools to cluster together small-sized virtual address mappings.
Add hooks to implement reserved virtual address zone with usage restrictions controlled by vendor hooks.
These hooks help in controlling virtual address space fragmentation.

Bug: 187259935

Signed-off-by: xieliujie <xieliujie@oppo.com>
Change-Id: I48c057041f9c7b8c5ab0af305f0cd87a039d0447
This commit is contained in:
xieliujie
2021-05-06 20:12:24 +08:00
committed by Suren Baghdasaryan
parent f150653471
commit dc5241048f
3 changed files with 24 additions and 1 deletions
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11
include/trace/hooks/mm.h
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@@ -47,6 +47,17 @@ DECLARE_HOOK(android_vh_meminfo_proc_show,
DECLARE_HOOK(android_vh_exit_mm,
TP_PROTO(struct mm_struct *mm),
TP_ARGS(mm));
DECLARE_HOOK(android_vh_get_unmapped_area_from_anti_fragment_pool,
TP_PROTO(struct mm_struct *mm, struct vm_unmapped_area_info *info,
unsigned long *addr),
TP_ARGS(mm, info, addr));
DECLARE_HOOK(android_vh_exclude_reserved_zone,
TP_PROTO(struct mm_struct *mm, struct vm_unmapped_area_info *info),
TP_ARGS(mm, info));
DECLARE_HOOK(android_vh_get_unmapped_area_include_reserved_zone,
TP_PROTO(struct mm_struct *mm, struct vm_unmapped_area_info *info,
unsigned long *addr),
TP_ARGS(mm, info, addr));
DECLARE_HOOK(android_vh_show_mem,
TP_PROTO(unsigned int filter, nodemask_t *nodemask),
TP_ARGS(filter, nodemask));