Messages in this thread | | | Date | Fri, 08 Sep 2006 23:56:56 +0530 | From | Balbir Singh <> | Subject | Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) |
| |
Dave Hansen wrote: > On Fri, 2006-09-08 at 11:33 +0400, Pavel Emelianov wrote: >> I'm afraid we have different understandings of what a "guarantee" is. > > It appears so. > >> Don't we? >> Guarantee may be one of >> >> 1. container will be able to touch that number of pages >> 2. container will be able to sys_mmap() that number of pages >> 3. container will not be killed unless it touches that number of pages > > A "death sentence" guarantee? I like it. :) > >> 4. anything else >> >> Let's decide what kind of a guarantee we want.
I think of guarantees w.r.t resources as the lower limit on the resource. Guarantees and limits can be thought of as the range (guarantee, limit] for the usage of the resource.
> > I think of it as: "I will be allowed to use this many total pages, and > they are guaranteed not to fail." (1), I think. The sum of all of the > system's guarantees must be less than or equal to the amount of free > memory on the machine. >
Yes, totally agree.
> If we knew to which NUMA node the memory was going to go, we might as > well take the pages out of the allocator. > > -- Dave > --
Balbir Singh, Linux Technology Center, IBM Software Labs - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |