Hello Maxim, On Thu, 30 May 2013 14:30:01 +0400 Maxim Uvarov <muvarov at gmail.com> wrote: > 2013/5/30 Zhang Yanfei <zhangyanfei at cn.fujitsu.com> > > > On 05/30/2013 05:14 PM, Maxim Uvarov wrote: > > > > > > > > > > > > 2013/5/27 HATAYAMA Daisuke <d.hatayama at jp.fujitsu.com <mailto: > > d.hatayama at jp.fujitsu.com>> > > > > > > (2013/05/24 18:02), Maxim Uvarov wrote: > > > > > > > > > > > > > > > 2013/5/24 Andrew Morton <akpm at linux-foundation.org <mailto: > > akpm at linux-foundation.org> <mailto:akpm at linux-foundation.__org <mailto: > > akpm at linux-foundation.org>>> > > > > > > > > > On Thu, 23 May 2013 14:25:48 +0900 HATAYAMA Daisuke < > > d.hatayama at jp.fujitsu.com <mailto:d.hatayama at jp.fujitsu.com> <mailto: > > d.hatayama at jp.fujitsu.__com <mailto:d.hatayama at 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
