From mboxrd@z Thu Jan 1 00:00:00 1970 From: Simon Kirby Subject: MD request counter broken on 4.0-rc5 RAID1 Date: Tue, 24 Mar 2015 17:04:03 -0700 Message-ID: <20150325000403.GA27368@hostway.ca> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Hello :) I'm seeing "iostat -x -k 1" print this after a RAID1 rebuild on 4.0-rc5. It's not abnormal other than it's 3-disk, with one being SSD (sdc) and the other two being write-mostly: Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util sda 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 sdb 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 sdc 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 md0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 345.00 0.00 0.00 0.00 0.00 100.00 md2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 58779.00 0.00 0.00 0.00 0.00 100.00 md1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 12.00 0.00 0.00 0.00 0.00 100.00 This was working on 3.18. Shall I bisect, or is it obvious? It seems to just be leaking as the counters were going up gradually while it was rebuilding. Personalities : [linear] [raid0] [raid1] [raid10] md1 : active raid1 sdb2[1](W) sda2[0](W) sdc2[2] 530048 blocks [3/3] [UUU] md2 : active raid1 sdb3[0](W) sdc3[2] sda3[1](W) 153613440 blocks [3/3] [UUU] md0 : active raid1 sdb1[0](W) sdc1[2] sda1[1](W) 2104384 blocks [3/3] [UUU] unused devices: Simo-