Re: [PATCH] mm: Do not walk all of system memory during show_mem

2013-11-04 Thread Mel Gorman
On Wed, Oct 16, 2013 at 06:11:56PM -0700, David Rientjes wrote: > On Wed, 16 Oct 2013, Mel Gorman wrote: > > > It has been reported on very large machines that show_mem is taking almost > > 5 minutes to display information. This is a serious problem if there is > > an OOM storm. The bulk of the co

Re: [PATCH] mm: Do not walk all of system memory during show_mem

2013-10-30 Thread KOSAKI Motohiro
(10/16/13 6:42 AM), Mel Gorman wrote: It has been reported on very large machines that show_mem is taking almost 5 minutes to display information. This is a serious problem if there is an OOM storm. The bulk of the cost is in show_mem doing a very expensive PFN walk to give us the following infor

Re: [PATCH] mm: Do not walk all of system memory during show_mem

2013-10-16 Thread David Rientjes
On Wed, 16 Oct 2013, Mel Gorman wrote: > It has been reported on very large machines that show_mem is taking almost > 5 minutes to display information. This is a serious problem if there is > an OOM storm. The bulk of the cost is in show_mem doing a very expensive > PFN walk to give us the followi

[PATCH] mm: Do not walk all of system memory during show_mem

2013-10-16 Thread Mel Gorman
It has been reported on very large machines that show_mem is taking almost 5 minutes to display information. This is a serious problem if there is an OOM storm. The bulk of the cost is in show_mem doing a very expensive PFN walk to give us the following information Total RAM: Also available a