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ANDROID: vendor_hook: customize gfp and decide whether to bypass in the large folio allocation path

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This hook is used as a supplement to the previous hook to dynamic modify the gfp and bypass of order pmd:
https://android-review.googlesource.com/c/kernel/common/+/3227165

Bug: 438090847
Change-Id: Ia33fdc62ab466cf5cfcc53d02b515e28a1ac1431
Signed-off-by: yan chang <changyan1@xiaomi.com>
This commit is contained in:
yan chang
2025-08-12 14:34:39 +08:00
committed by Treehugger Robot
parent d62d9aa3e3
commit 3dd71156b3
3 changed files with 8 additions and 0 deletions
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1
drivers/android/vendor_hooks.c
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@@ -582,6 +582,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_mem_cgroup_charge);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_filemap_add_folio);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_shrink_node);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_customize_thp_gfp_orders);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_customize_pmd_gfp_bypass);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_thp_vma_allowable_orders);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_cpuset_fork);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_alloc_uid);

3
include/trace/hooks/mm.h
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@@ -603,6 +603,9 @@ DECLARE_HOOK(android_vh_mm_try_split_folio_bypass,
DECLARE_HOOK(android_vh_customize_thp_gfp_orders,
TP_PROTO(gfp_t *gfp_mask, unsigned long *orders, int *order),
TP_ARGS(gfp_mask, orders, order));
DECLARE_HOOK(android_vh_customize_pmd_gfp_bypass,
TP_PROTO(gfp_t *gfp_mask, bool *bypass),
TP_ARGS(gfp_mask, bypass));
DECLARE_HOOK(android_vh_thp_vma_allowable_orders,
TP_PROTO(struct vm_area_struct *vma, unsigned long *orders),
TP_ARGS(vma, orders));

4
mm/huge_memory.c
View File

@@ -1281,6 +1281,7 @@ vm_fault_t do_huge_pmd_anonymous_page(struct vm_fault *vmf)
struct folio *folio;
unsigned long haddr = vmf->address & HPAGE_PMD_MASK;
vm_fault_t ret;
bool bypass = false;
if (!thp_vma_suitable_order(vma, haddr, PMD_ORDER))
return VM_FAULT_FALLBACK;
@@ -1330,6 +1331,9 @@ vm_fault_t do_huge_pmd_anonymous_page(struct vm_fault *vmf)
return ret;
}
gfp = vma_thp_gfp_mask(vma);
trace_android_vh_customize_pmd_gfp_bypass(&gfp, &bypass);
if (bypass)
return VM_FAULT_FALLBACK;
folio = vma_alloc_folio(gfp, HPAGE_PMD_ORDER, vma, haddr, true);
if (unlikely(!folio)) {
count_vm_event(THP_FAULT_FALLBACK);