sysctl_extfrag_threshold 90 include/linux/compaction.h extern int sysctl_extfrag_threshold; sysctl_extfrag_threshold 1484 kernel/sysctl.c .data = &sysctl_extfrag_threshold, sysctl_extfrag_threshold 2028 mm/compaction.c if (fragindex >= 0 && fragindex <= sysctl_extfrag_threshold) sysctl_extfrag_threshold 2327 mm/compaction.c int sysctl_extfrag_threshold = 500;