Did test on 1TB machine. Total vmcore capture and save took 143 minutes while vmcore size increased from 9Gb to 59Gb. Will do some debug for that. Maxim. 2013/6/3 Atsushi Kumagai > Hello Maxim, > > On Thu, 30 May 2013 14:30:01 +0400 > Maxim Uvarov wrote: > > > 2013/5/30 Zhang Yanfei > > > > > On 05/30/2013 05:14 PM, Maxim Uvarov wrote: > > > > > > > > > > > > > > > > 2013/5/27 HATAYAMA Daisuke > > d.hatayama@jp.fujitsu.com>> > > > > > > > > (2013/05/24 18:02), Maxim Uvarov wrote: > > > > > > > > > > > > > > > > > > > > 2013/5/24 Andrew Morton > > akpm@linux-foundation.org> > > akpm@linux-foundation.org>>> > > > > > > > > > > > > On Thu, 23 May 2013 14:25:48 +0900 HATAYAMA Daisuke < > > > d.hatayama@jp.fujitsu.com > > d.hatayama@jp.fujitsu.__com >> > wrote: > > > > > > > > > This patch introduces mmap_vmcore(). > > > > > > > > > > Don't permit writable nor executable mapping even with > > > mprotect() > > > > > because this mmap() is aimed at reading crash dump > memory. > > > > > Non-writable mapping is also requirement of > > > remap_pfn_range() when > > > > > mapping linear pages on non-consecutive physical > pages; > > > see > > > > > is_cow_mapping(). > > > > > > > > > > Set VM_MIXEDMAP flag to remap memory by > remap_pfn_range > > > and by > > > > > remap_vmalloc_range_pertial at the same time for a > single > > > > > vma. do_munmap() can correctly clean partially > remapped > > > vma with two > > > > > functions in abnormal case. See zap_pte_range(), > > > vm_normal_page() and > > > > > their comments for details. > > > > > > > > > > On x86-32 PAE kernels, mmap() supports at most 16TB > > > memory only. This > > > > > limitation comes from the fact that the third > argument of > > > > > remap_pfn_range(), pfn, is of 32-bit length on x86-32: > > > unsigned long. > > > > > > > > More reviewing and testing, please. > > > > > > > > > > > > Do you have git pull for both kernel and userland changes? I > > > would like to do some more testing on my machines. > > > > > > > > Maxim. > > > > > > > > > > > > Thanks! That's very helpful. > > > > > > > > -- > > > > Thanks. > > > > HATAYAMA, Daisuke > > > > > > > > Any update for this? Where can I checkout all sources? > > > > > > This series is now in Andrew Morton's -mm tree. > > > > > > Ok, and what about makedumpfile changes? Is it possible to fetch them > from > > somewhere? > > You can fetch them from here, "mmap" branch is the change: > > git://git.code.sf.net/p/makedumpfile/code > > And they will be merged into v1.5.4. > > > Thanks > Atsushi Kumagai > > _______________________________________________ > kexec mailing list > kexec@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/kexec > -- Best regards, Maxim Uvarov