> On Apr 13, 2017, at 3:34 AM, Roman Mamedov <rm@xxxxxxxxxxx> wrote: > > On Thu, 13 Apr 2017 18:25:44 +0800 > d tbsky <tbskyd@xxxxxxxxx> wrote: > >> RHEL 7 use kernel 3.10 so it should not be affected. at least >> RHEL 7.2 I didn't notice this kind of problem. maybe RHEL 7.3 pull >> some feature/patch from upstream kernel. I will try to report to >> redhat bugzilla to see if they can fix these. > > Out of curiousity I checked the RHEL 7.3 kernel 3.10 source as available at: > http://vault.centos.org/7.3.1611/updates/Source/SPackages/kernel-3.10.0-514.10.2.el7.src.rpm > and yes indeed they have included that patch from the upstream 4.x kernel. > Interesting. Just to say that I have noticed a similar issue on CentOS 7.3 (using 3.10.0-514.10.2.el7_lustre.x86_64). I am using multiple raid6 md (8+2) and I had to deploy a cron script that checks if each raid is degraded or not, and set speed_limit_max accordingly (eg. higher “priority” for rebuild if array degraded) but always below the max throughput… or other user I/Os become too slow. Not ideal but works fine this way. Best regards, Stéphane��.n��������+%������w��{.n�����{����w��ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
