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Jianxiong Pan
71008eab74
PD#SWPL-73422 Problem: When driver/kernel call kmalloc with large size, memory may waste if size is not equal to 2^n. For example, driver call kmalloc with size 129KB, kmalloc will allocate a 256KB memory block to caller. Then 127kb memory will be wasted if this caller do not free it. Solution: Free tail of slab memory if size is not match to 2^n. This change can save about 900KB memory after boot, and more than 100KB durning runtime. Verify: local. Change-Id: I19cfbdddc92b1c2050cbc17ea65feb4b01f0445d Signed-off-by: Jianxiong Pan <jianxiong.pan@amlogic.com>
14 lines
459 B
C
14 lines
459 B
C
/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
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/*
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* Copyright (c) 2019 Amlogic, Inc. All rights reserved.
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*/
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#ifndef _INC_AML_MM_H_
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#define _INC_AML_MM_H_
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void should_wakeup_kswap(gfp_t gfp_mask, int order,
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struct alloc_context *ac);
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void adjust_redzone_end(const void *ptr, size_t size, unsigned long *p_end);
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void *aml_slub_alloc_large(size_t size, gfp_t flags, int order);
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int aml_free_nonslab_page(struct page *page, void *object);
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#endif
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