函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:lib\raid6\algos.c Create Date:2022-07-27 08:07:08
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：raid6_choose_gen

函数原型：static inline const struct raid6_calls *raid6_choose_gen(void *( *const dptrs)[(65536/((1UL)<<12))+2], const int disks)

返回类型：struct raid6_calls

参数：

类型参数名称
void *( *constdptrs
const intdisks
152  start等于disks右移1位的值减1, stop等于disks减3
156  以algo循环
157  如果非best或Has special performance attribute 大于等于Has special performance attribute 则
158  如果valid且非valid()则继续下一循环
161  如果非IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm',* 0 otherwise.(CONFIG_RAID6_PQ_BENCHMARK)则
162  best等于algo
163  退出
166  perf等于0
168  禁止抢占()
169  j0等于jiffies
170  当j1等于jiffies恒等于j0循环
171  cpu_relax()
172  当time_before(jiffies, j1 + (1 << RAID6_TIME_JIFFIES_LG2))循环
174  gen_syndrome(disks, PAGE_SIZE, * dptrs)
175  perf自加
177  禁用抢占和中断()
179  如果perf大于bestgenperf则
180  bestgenperf等于perf
181  best等于algo
183  打印信息("raid6: %-8s gen() %5ld MB/s\n", Name of this routine set , (perf * HZ) >> (20 - 16 + RAID6_TIME_JIFFIES_LG2))
186  如果非xor_syndrome则继续下一循环
189  perf等于0
191  禁止抢占()
192  j0等于jiffies
193  当j1等于jiffies恒等于j0循环
194  cpu_relax()
195  当time_before(jiffies, j1 + (1 << RAID6_TIME_JIFFIES_LG2))循环
197  xor_syndrome(disks, start, stop, PAGE_SIZE, * dptrs)
199  perf自加
201  禁用抢占和中断()
203  如果best恒等于algo则bestxorperf等于perf
206  打印信息("raid6: %-8s xor() %5ld MB/s\n", Name of this routine set , (perf * HZ) >> (20 - 16 + RAID6_TIME_JIFFIES_LG2 + 1))
211  如果best则
212  打印信息("raid6: using algorithm %s gen() %ld MB/s\n", Name of this routine set , (bestgenperf * HZ) >> (20 - 16 + RAID6_TIME_JIFFIES_LG2))
215  如果xor_syndrome则打印信息("raid6: .... xor() %ld MB/s, rmw enabled\n", (bestxorperf * HZ) >> (20 - 16 + RAID6_TIME_JIFFIES_LG2 + 1))
218  raid6_call等于best
219  否则打印错误信息("raid6: Yikes! No algorithm found!\n")
222  返回:best
调用者
名称描述
raid6_select_algoThis code uses the gfmul table as convenient data set to abuse