Re: [PATCH 14/14] skip readahead if the cgroup is congested

2018-07-02 Thread Tejun Heo
On Fri, Jun 29, 2018 at 03:25:42PM -0400, Josef Bacik wrote: > From: Josef Bacik > > We noticed in testing we'd get pretty bad latency stalls under heavy > pressure because read ahead would try to do its thing while the cgroup > was under severe pressure. If we're under this much pressure we

Re: [PATCH 14/14] skip readahead if the cgroup is congested

2018-07-02 Thread Tejun Heo
On Fri, Jun 29, 2018 at 03:25:42PM -0400, Josef Bacik wrote: > From: Josef Bacik > > We noticed in testing we'd get pretty bad latency stalls under heavy > pressure because read ahead would try to do its thing while the cgroup > was under severe pressure. If we're under this much pressure we