Hi folks, I met a problem when investigating the swap code. There is an array called swap_vnodes[],which contains pointers to all the swap vnodes in system.
static struct vnode **swap_vnodes; #define MAX_SWAP_VNODES 2048 While this is a pointer to pointer,I would like to dump the array and see which slots are already allocated. mdb -k > swap_vnodes/K swap_vnodes: swap_vnodes: fffffffecc47e000 > fffffffecc47e000::array "struct vnode *" 0t2048 p|::eval <p/K 0xfffffffecc47e000: 0 0xfffffffecc47e008: 0 0xfffffffecc47e010: 0 0xfffffffecc47e018: 0 0xfffffffecc47e020: 0 0xfffffffecc47e028: 0 0xfffffffecc47e030: 0 0xfffffffecc47e038: 0 0xfffffffecc47e040: 0 0xfffffffecc47e048: 0 0xfffffffecc47e050: 0 0xfffffffecc47e058: 0 0xfffffffecc47e060: 0 0xfffffffecc47e068: 0 0xfffffffecc47e070: 0 ...... > fffffffecc47e000::array "struct vnode *" 0t2048 p|::eval <p/K|::grep .!=0 sh: =0: not found mdb: syntax error on line 1 of (pipeline) near ":" > fffffffecc47e000::array "struct vnode *" 0t2048 p|::eval <p/K|::grep .==0 mdb: syntax error on line 1 of (pipeline) near ":" > 0xfffffffecc47e000/K|::grep .!=0 sh: =0: not found > 0xfffffffecc47e000/K|::grep .==0 0 My two questions: 1) It seems that != is not supported in mdb, so how can I specify "not equal" in mdb? 2) While == works, it doesn't work for the above case, I guess it is related to "/K", is there any way to work around it or do we need to fix it? Thanks, Zhijun
