qcow2-cache.c (59c58f96b270f5edd4ad10954c3a96556cb3a728) qcow2-cache.c (038adc2f5850e32019bda06c559d0301be436eae)
1/*
2 * L2/refcount table cache for the QCOW2 format
3 *
4 * Copyright (c) 2010 Kevin Wolf <kwolf@redhat.com>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights

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69 }
70}
71
72static void qcow2_cache_table_release(Qcow2Cache *c, int i, int num_tables)
73{
74/* Using MADV_DONTNEED to discard memory is a Linux-specific feature */
75#ifdef CONFIG_LINUX
76 void *t = qcow2_cache_get_table_addr(c, i);
1/*
2 * L2/refcount table cache for the QCOW2 format
3 *
4 * Copyright (c) 2010 Kevin Wolf <kwolf@redhat.com>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights

--- 60 unchanged lines hidden (view full) ---

69 }
70}
71
72static void qcow2_cache_table_release(Qcow2Cache *c, int i, int num_tables)
73{
74/* Using MADV_DONTNEED to discard memory is a Linux-specific feature */
75#ifdef CONFIG_LINUX
76 void *t = qcow2_cache_get_table_addr(c, i);
77 int align = getpagesize();
77 int align = qemu_real_host_page_size;
78 size_t mem_size = (size_t) c->table_size * num_tables;
79 size_t offset = QEMU_ALIGN_UP((uintptr_t) t, align) - (uintptr_t) t;
80 size_t length = QEMU_ALIGN_DOWN(mem_size - offset, align);
81 if (mem_size > offset && length > 0) {
82 madvise((uint8_t *) t + offset, length, MADV_DONTNEED);
83 }
84#endif
85}

--- 373 unchanged lines hidden --- 		78 size_t mem_size = (size_t) c->table_size * num_tables;
79 size_t offset = QEMU_ALIGN_UP((uintptr_t) t, align) - (uintptr_t) t;
80 size_t length = QEMU_ALIGN_DOWN(mem_size - offset, align);
81 if (mem_size > offset && length > 0) {
82 madvise((uint8_t *) t + offset, length, MADV_DONTNEED);
83 }
84#endif
85}

--- 373 unchanged lines hidden ---