Hello Vivek, On Wed, 8 Aug 2012 09:25:10 -0400 Vivek Goyal <vgoyal at redhat.com> wrote: > On Wed, Aug 08, 2012 at 02:14:00PM +0900, Atsushi Kumagai wrote: > > Hello Vivek, > > > > On Mon, 6 Aug 2012 16:47:31 -0400 > > Vivek Goyal <vgoyal at redhat.com> wrote: > > > > > On Fri, Jun 29, 2012 at 11:13:20AM +0900, Atsushi Kumagai wrote: > > > > Hello, > > > > > > > > I improved prototype of cyclic processing as version 2. > > > > If there is no objection to basic idea, I want to consider the things > > > > related to performance as next step. (Concretely, buffer size and the patch set > > > > HATAYAMA-san sent a short time ago.) > > > > > > Hi Atsushi San, > > > > > > Just checking that what's the state of these patches now. Are they ready > > > to be included in makedumpfile? > > > > Yes, v2 patches with some fixes are ready to be merged into mainline. > > At this time, makedumpfile can work in constant memory space. > > (To make sure it's correct, we need to see the result of HATAYAMA-san's benchmark.) > > > > > I would love to see new makedumpfile where memory usage does not grow > > > by physical memory present in the system. (Assuming computig overhead > > > of cycles is bearable). > > > > I planed to release the next version with the new method to exclude free pages > > (based on HATAYAMA-san's RFC patches). This method looks up members of each page > > instead of free_list, it's only for performance. > > > > http://lists.infradead.org/pipermail/kexec/2012-June/006441.html > > > > But, this method need more time for consideration, review and test. > > > > > > If you need the new makedumpfile which can work in constant memory space soon, > > shall I release the new version as soon as possible ? > > (But, this version still looks up free_list to exclude free pages same as v1.4.4.) > > > > I think once Hatayama's testing is done, it is a good idea to merge cyclic > patches and make a release. And soon after review and testing, merge > hatayama's other patches of walking through mem_map array. My understanding > is that walking through mem_map array will save us cpu cycles in fixed > memory usage mode. OK, I start to prepare for the release of the next version with cyclic patches. Your understanding of walking through mem_map array is correct, it's expected to reduce wasteful process in fixed memory usage mode. http://lists.infradead.org/pipermail/kexec/2012-July/006543.html Thanks Atsushi Kumagai
