Jianlin Lv <iecedge@xxxxxxxxx> writes: > From: Jianlin Lv <iecedge@xxxxxxxxx> > > Global reclaim will swap even if swappiness is set to 0. Why? Can you elaborate the situation? > In particular > case, users wish to be able to completely disable swap for specific > processes. One scenario is that if JVM memory pages falls into swap, > the performance will noticeably reduce and the GC pauses tend to increase > to levels not tolerable by most applications. > If it's possible to only disable swap out for specific processes, it can > address the JVM GC pauses issues, and at the same time, memory reclaim > pressure is also manageable. > > This patch adds "memory.swap_force_disable" control file to support disable > swap for non-root cgroup. When process is associated with a cgroup, > 'echo 1 > memory.swap_force_disable' will forbid anon pages be swapped out. > This patch also adds read and write handler of the control file. -- Best Regards, Huang, Ying
