(2013/09/18 12:00), Atsushi Kumagai wrote: > (2013/08/30 10:33), HATAYAMA Daisuke wrote: >> (2013/08/29 7:08), Cliff Wickman wrote: >>> From: Cliff Wickman <cpw at sgi.com> >>> >>> I am submitting 6 patches that I have found helpful in speeding the dump >>> process or clarifying the progress report. >>> They are not a series, and should not be interdependent. But if you >>> find any dependencies I apply them in this order: >>> [PATCH] makedumpfile: reverse -c and -p if using snappy compression >>> [PATCH] makedumpfile: use non-cyclic when possible >>> [PATCH] makedumpfile: shorten cyclic exclude-unnecessary passes >>> [PATCH] makedumpfile: shorten cyclic unnecessary-page scans >>> [PATCH] makedumpfile: show needed memory >>> [PATCH] makedumpfile: search for a debug vmlinux >>> >>> The last one (search for a debug vmlinux) is useful in identifying huge >>> pages with the PG_head/PG-tail flags. There was a patch from Petr Tesarik >>> that enables that huge page filtering. I don't think you are taking that one >>> as-is, but are reworking it. Seems like Hatayama-san was doing that work. >> >> No. If I have good memory, Kumagai-san was investigating how to integrate >> huge page filtering into current memory types currently supported by >> makedumpfile. > > Yes, I was investigating it but I'm not working for it now. > > I think main features should work without vmlinux, > but it was impossible about his patch as said by himself: > >> This patch depends on exporting the relevant PG_* flags from the >> kernel (in VMCOREINFO), and that's where I got stuck, because depending >> on the number of available bits for the page flags, the kernel either >> has PG_head and PG_tail, or only PG_compound, so I needed a #ifdef, and >> the kernel maintainers didn't like the conditional. >> I can restart the discussion with kernel maintainers and see what I can do > > Therefore, I waited that his work is finished and I was going to continue > my work, but I didn't say my thinking definitely, sorry. > > Anyway, I should cooperate with Petr to develop huge page filtering, > so could you let me know the status of your work ? > To whom do you make this question? It seems Cliff according to content of this question. If so you should resend. If to me, I have not done huge page filtering work at all so far as I already said in the previous mail in this thread. -- Thanks. HATAYAMA, Daisuke
