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ANDROID: vendor_hooks: add hook to retry mempool allocation without delay

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Allow important priority threads to retry mempool allocation,
achieving fast memory allocation and solving lagging problems
caused by delaying 5 seconds.

Bug: 423832910
Change-Id: I80e6b1c55652f5a62ac36bbf0091d22ec7fb6189
Signed-off-by: Justin Jiang <justinjiang@vivo.corp-partner.google.com>
This commit is contained in:
Justin Jiang
2025-06-10 20:39:11 +08:00
committed by Treehugger Robot
parent 45afa56280
commit 68191d9c7a
3 changed files with 12 additions and 0 deletions
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1
drivers/android/vendor_hooks.c
View File

@@ -677,3 +677,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_filemap_folio_mapped);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_folio_remove_rmap_ptes);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_pageset_update);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_xhci_full_reset_on_remove);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_mempool_alloc_skip_wait);

3
include/trace/hooks/mm.h
View File

@@ -596,6 +596,9 @@ DECLARE_HOOK(android_vh_folio_remove_rmap_ptes,
DECLARE_HOOK(android_vh_pageset_update,
TP_PROTO(unsigned long *high, unsigned long *batch),
TP_ARGS(high, batch));
DECLARE_HOOK(android_vh_mempool_alloc_skip_wait,
TP_PROTO(gfp_t *gfp_flags, bool *skip_wait),
TP_ARGS(gfp_flags, skip_wait));
#endif /* _TRACE_HOOK_MM_H */
/* This part must be outside protection */

8
mm/mempool.c
View File

@@ -19,6 +19,8 @@
#include <linux/mempool.h>
#include <linux/writeback.h>
#include "slab.h"
#undef CREATE_TRACE_POINTS
#include <trace/hooks/mm.h>
#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_SLUB_DEBUG_ON)
static void poison_error(mempool_t *pool, void *element, size_t size,
@@ -383,6 +385,7 @@ void *mempool_alloc(mempool_t *pool, gfp_t gfp_mask)
unsigned long flags;
wait_queue_entry_t wait;
gfp_t gfp_temp;
bool skip_wait = false;
VM_WARN_ON_ONCE(gfp_mask & __GFP_ZERO);
might_alloc(gfp_mask);
@@ -428,6 +431,11 @@ repeat_alloc:
spin_unlock_irqrestore(&pool->lock, flags);
return NULL;
}
trace_android_vh_mempool_alloc_skip_wait(&gfp_temp, &skip_wait);
if (skip_wait) {
spin_unlock_irqrestore(&pool->lock, flags);
goto repeat_alloc;
}
/* Let's wait for someone else to return an element to @pool */
init_wait(&wait);