Ok, thanks. So we can look forward this bug will fix in rhel 6.11. If my system is base on rhel 6.7, is there any way to solve it? Xiao Ni <xni@xxxxxxxxxx> 于2019年1月30日周三 下午5:15写道： > > > > On 01/30/2019 03:25 PM, Jack Wang wrote: > > 李春 <pickup112@xxxxxxxxx> 于2019年1月30日周三 上午7:08写道： > >> # Description of problem: > >> We loaded a disk from two network of storage node via iscsi, merged > >> into a disk through multipath, and made a raid1 with local disk by > >> mdadm. > >> However, when the storage machine of iscsi disk rebooted, raid1 disk > >> does not automatically eject the abnormal disk when there are some IO > >> pressure. > >> > >> # Version-Release number of selected component (if applicable): > >> vermagic: 2.6.32-573.el6.x86_64 SMP mod_unload modversions > >> srcversion: 39AAB97325332236F2FFCA9 > >> > >> # How reproducible: > >> always > >> > >> # Steps to Reproduce: > >> 1. export a disk from storage node > >> 2. load the disk on another node and merge it with multipath > >> 3. assemble a local disk and the multipath by madm to a raid1 disk > >> 4. reboot > >> > >> # Actual results: > >> * multipath disk not eject from raid1 disk under Fio pressure > >> * multipath disk eject immediately from raid1 disk when stop Fio pressure > >> > >> # Expected results: > >> * multipath disk eject immediately from raid1 disk under Fio pressure > >> > >> # Additional info: > >> We have done the following tests: > >> * In rhel6.7 with kernel of 2.6.32-573.el6.x86_64 test, mdadm's raid1 > >> will eliminate the abnormal disk after 5 seconds without IO pressure > >> * In rhel6.7 with kernel of 2.6.32-573.el6.x86_64 test, in the case of > >> IO pressure, mdadm's raid1 will not reject the abnormal disk, until > >> the IO pressure stops, the disk will be removed. > >> * In rhel7.4 with kernel of 3.10.0-693.el7.x86_64 test, mdadm's raid1 > >> will eliminate the abnormal disk after 5 seconds without IO pressure > >> * In rhel7.4 with kernel of 3.10.0-693.el7.x86_64 test, mdadm's raid1 > >> will eliminate abnormal disk after 5 seconds under IO pressure > >> > >> Thanks for your help. > > Sounds like, you want failfast feature in upstream, not sure if RH > > backport it into their kernel. > Thanks for the reporting and analysis. > rhel6 is in the period that it's recommended to fix bugs only. So it > doesn't backport some features. > I'll have a try to backport this to rhel6. > > Regards > Xiao -- 李春 Pickup Li 产品研发部 首席架构师 www.woqutech.com 杭州沃趣科技股份有限公司 杭州市滨江区滨安路1190号智汇中心A座1004室 310052 Hangzhou WOQU Technology Co., Ltd. Room 1004, Building A, D-innovation Center, No. 1190, Bin' an road, Hangzhou 310052 T：(0571) 87770835 M：(86)18989451982 F：(0571) 86805750 E：pickup.li@xxxxxxxxxxxx
