函数逻辑报告 |
Source Code:kernel\trace\ring_buffer.c |
Create Date:2022-07-27 13:01:08 |
| Last Modify:2020-03-17 19:30:04 | Copyright©Brick |
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函数名称：g_buffer_alloc_read_page - allocate a page to read from buffer*@buffer: the buffer to allocate for
函数原型：void *ring_buffer_alloc_read_page(struct ring_buffer *buffer, int cpu)
返回类型：void
参数：
| 类型 | 参数 | 名称 |
|---|---|---|
| struct ring_buffer * | buffer | |
| int | cpu |
| 4596 | struct buffer_data_page * bpage = NULL |
| 4603 | cpu_buffer等于buffers[cpu] |
| 4604 | local_irq_save(flags) |
| 4605 | r sched/core.c and kernel_lock.c: ( & lock) |
| 4607 | 如果free_page则 |
| 4612 | arch_spin_unlock( & lock) |
| 4613 | local_irq_restore(flags) |
| 4618 | page等于Allocate pages, preferring the node given as nid. When nid == NUMA_NO_NODE,* prefer the current CPU's closest node. Otherwise node must be valid and* online. |
| 4623 | bpage等于page_address(page) |
| 4625 | out : |
| 4626 | rb_init_page(bpage) |
| 4628 | 返回:bpage |
| 源代码转换工具 开放的插件接口 | X |
|---|---|
| 支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告 代码生成和批量转换代码 |