On Wed, Nov 06, 2013 at 09:47:49AM +0800, Jingbai Ma wrote: > On 11/06/2013 04:26 AM, Vivek Goyal wrote: > >On Tue, Nov 05, 2013 at 09:45:32PM +0800, Jingbai Ma wrote: > >>This patch set intend to exclude unnecessary hugepages from vmcore dump file. > >> > >>This patch requires the kernel patch to export necessary data structures into > >>vmcore: "kexec: export hugepage data structure into vmcoreinfo" > >>http://lists.infradead.org/pipermail/kexec/2013-November/009997.html > >> > >>This patch introduce two new dump levels 32 and 64 to exclude all unused and > >>active hugepages. The level to exclude all unnecessary pages will be 127 now. > > > >Interesting. Why hugepages should be treated any differentely than normal > >pages? > > > >If user asked to filter out free page, then it should be filtered and > >it should not matter whether it is a huge page or not? > > Yes, free hugepages should be filtered out with other free pages. It > sounds reasonable. > > But for active hugepages, I would offer user more > choices/flexibility. (maybe bad). > I'm OK to filter active hugepages with other user data page. > > Any other comments? I really can't see why hugepages are different than regular pages when it comes to filtering. IMO, we really should not create filtering option/levels only for huge pages, until and unless there is a strong use case. Thanks Vivek
