Hi, Please check this patch, it could fix your problem, http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e62e384e9da8d9a0c599795464a7e76fd490931c -- Thanks, Zhu Yanhai 2013/6/26 Aaron Staley <aaron@xxxxxxxxxxx> > Hi Serge, > > Thanks a lot. Would you know of any workarounds outside of forcing every > write to sync to disk (which kills performance)? Perhaps some settings in > the container I can set? Unfortunately, modifying dirty_background_ratio > and dirty_expire_centiseconds globally (/etc/sysctl.conf) as suggested by > the serverfault answer will not stop the OOM kills. > > Regards, > Aaron > > > On Tue, Jun 25, 2013 at 6:24 AM, Serge Hallyn <serge.hallyn@xxxxxxxxxx > >wrote: > > > Quoting Aaron Staley (aaron@xxxxxxxxxxx): > > > This is better explained here: > > > > > > http://serverfault.com/questions/516074/why-are-applications-in-a-memory-limited-lxc-container-writing-large-files-to-di > > > (The > > > highest-voted answer believes this to be a kernel bug.) > > > > Yeah, sorry I haven't had time to look more into it, but I'm pretty > > that's the case. When you sent the previous email I looked quickly at > > the dd source. I had always assumed that dd looked at available memory > > and malloced as much as it thought it could - but looking at the source, > > it does not in fact do that. So yes, I think the kernel is simply > > leaving it all in page cache and accounting that to the process which > > then gets OOMed. > > > > Instead, the kernel should be throttling the task while it waits for > > the page cache to be written to disk (since blkio might also be > > slowed down). > > > > -serge > > > > > > -- > Aaron Staley > *PiCloud, Inc.* > _______________________________________________ > Containers mailing list > Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx > https://lists.linuxfoundation.org/mailman/listinfo/containers > _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/containers
