On Mon, Jun 11, 2012 at 2:23 AM, David Rientjes <rientjes@xxxxxxxxxx> wrote: > On Mon, 11 Jun 2012, Kamezawa Hiroyuki wrote: > >> Now, I think... >> >> 1. I need to agree that overhead is _not_ negligible. >> >> 2. THP should be the way rather than hugetlb for my main target platform. >> (shmem/tmpfs should support THP. we need study.) >> user-experience should be fixed by THP+tmpfs+memcg. >> >> 3. It seems Aneesh decided to have independent hugetlb cgroup. >> >> So, now, I admit to have independent hugetlb cgroup. >> Other opinions ? >> > > I suggested the seperate controller in the review of the patchset so I > obviously agree with your conclusion. I don't think we should account for > hugetlb pages in memory.usage_in_bytes and enforce memory.limit_in_bytes > since 512 4K pages is not the same as 1 2M page which may be a sacred > resource if fragmentation is high. > Based on the usecase at Google, I see a definite value in including hugepage usage in memory.usage_in_bytes as well and having a single limit for memory usage for the job. Our jobs wants to specify only one (total) memory limit (including slab usage, and other kernel memory usage, hugepages, etc.). The hugepage/smallpage requirements of the job vary during its lifetime. Having two different limits means less flexibility for jobs as they now have to specify their limit as (max_hugepage, max_smallpage) instead of max(hugepage + smallpage). Two limits complicates the API for the users and requires them to over-specify the resources. > Many thanks to Aneesh for continuing to update the patchset and working > toward a resolution on this, I love the direction its taking. > > -- > To unsubscribe, send a message with 'unsubscribe linux-mm' in > the body to majordomo@xxxxxxxxx. For more info on Linux MM, > see: http://www.linux-mm.org/ . > Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a> Thanks, -- Aditya -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href