(2013/10/02 21:03), Michael Holzheu wrote: > Hello Alexey, > > Looks like the following commit broke mmap for /proc/vmcore: > > commit c4fe24485729fc2cbff324c111e67a1cc2f9adea > Author: Alexey Dobriyan <adobriyan at gmail.com> > Date: Tue Aug 20 22:17:24 2013 +0300 > > sparc: fix PCI device proc file mmap(2) > > Because /proc/vmcore (fs/proc/vmcore.c) does not implement the > get_unmapped_area() fops function mmap now always returns EIO. > > Michael > I confirmed the bug on v3.12-rc3. According to makedumpfile's log, mmap failed on /proc/vmcore. mem_map (271) mem_map : ffffea001da40000 pfn_start : 878000 pfn_end : 880000 Kernel can't mmap vmcore, using reads. STEP [Excluding unnecessary pages] : 1.268799 seconds STEP [Excluding unnecessary pages] : 1.268756 seconds STEP [Copying data ] : 44.847924 seconds Writing erase info... I'll post a patch later. -- Thanks. HATAYAMA, Daisuke
