May be my previous message was not delivered, so i repeat it now: 2011/3/23 Степан Фёдоров <stepan.fedorov@xxxxxxxx>: > Hello! > I have some questions about dm-ioband module. > My m-ioband patch version is 1.14.0 on SLES11SP1 2.6.32.29-0.3-xen kernel. > /dev/mapper/1id-22-109 is a multipath device. In normal case, block device > performance test shows 500-600Mb/sec on this device. > Next i do next commands: > echo "0 $(blockdev --getsize /dev/mapper/1id-22-109) ioband > /dev/mapper/1id-22-109 0 0 0 none range-bw 0 :10000:50000" |dmsetup create > iob-22-109 > in /dev/mapper i see iob-22-109 device. OK. > My block device performance test shows on this device about 50Mb/sec. > dmsetup table shows me: > iob-22-109: 0 10485760 ioband 253:5 0 4 192 none range-bw 12288 :10000:50000 > for this device. > All this is OK, and next i want to change somthing. I do: > dmsetup message iob-22-109 0 max-bw 70000 > My block device performance test shows now on this device about > 500-600Mb/sec, and dmsetup table shows: > iob-22-109: 0 10485760 ioband 253:5 0 4 192 none range-bw 12288 :10000:0 > As you can see - maximum bandwidth value, resets to zero after setting it to > 70Mb by "dmsetup message ..." command. > If next i change min-bw by same way - it also rests to zero instead right > value. > My question: is this a bug in some software, or just a result of something > wrong in my actions? > Thank you! > -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
