Re: [Crash-utility] WARNING: cannot access vmalloc'd module memory

Mike Mason wrote: Hi Mike, It's a read error, and given that netdump/diskdump/kdump all use the same "read_netdump()" function, if the physical address associated with vmalloc address f8c6f680 is not found in the vmcore file, a read error like the above will occur. However, that does presume that the virtual-to-physical translation of the module's vmalloc'd address is correct. If you run crash on the live system running that particular kernel, is module data accessible? Also, if you do a "vtop f8c6f680", it will give you the physical address that would be passed to read_netdump() to access. You can then check that physical address against the ranges of physical memory stored in the vmcore by doing a "help -n". Dave