Description Sub-command "swap" in crash command doesn't show any info about swap partition in kernel versions 2.6.28 and above crash> swap FILENAME TYPE SIZE USED PCT PRIORITY crash> q feastlp4:~ # Analysis Swap specific information comes from the kernel data structure swap_info_struct .The problem starts when it access the fields of swap_info_struct. In this case ---------------------- flags = INT(vt->swap_info_struct + OFFSET(swap_info_struct_flags)); if (!(flags & SWP_USED)) continue; <== Hits this case ---------------------- flags gets value '0' and hence it returns with out calculating swap values This is happening because post 2.6.28 (precisely commit: ebebbbe904634b0ca1c674457b399f68db5e05b1) changes flag field in swap_info_struct from 'int' to 'unsigned long'. flags always gets zero and jumps further calculation. Fix Patch has been attached to this mail Thanks Sharyathi