| commit | 4f16e9aa09862911cb7ec38061a48b91a72142c3 | [log] [tgz] |
|---|---|---|
| author | Josef Bacik <jbacik@fb.com> | Thu Jun 14 07:49:51 2018 -0700 |
| committer | Josef Bacik <josef@toxicpanda.com> | Fri Jun 29 15:19:28 2018 -0400 |
| tree | 5ac767728a7dae721fb634bd121d63ef12835f99 | |
| parent | 2db6d8938b1d8cd8fac55b90c95385deb44c1007 [diff] |
skip readahead if the cgroup is congested 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 want to do as little IO as possible so we can still make progress on real work if we're a throttled cgroup, so just skip readahead if our group is under pressure. Signed-off-by: Josef Bacik <jbacik@fb.com>