On 09/11/2020 04:53 PM, HAGIO KAZUHITO(萩尾 一仁) wrote: > Hi Pingfan, > > -----Original Message----- >> Hello, >> >> There is an appeal which only wants to save some user page including env >> and args pages, and discards the other user space pages. > > I understand that it's helpful to get them even with -d 31 for crash's > "ps -a" option.. > >> >> To achieve this feature, mm_struct's members "arg_start, arg_end, >> env_start, env_end;" should be accessed. So we need to export mm_struct >> and init_mm through vmcore. > > How many offsets/sizes will be required to walk all tasks? At present, I think only the info "arg_start, arg_end, env_start, env_end" in mm_struct are required. > If kernel maintainers accept it, I will not oppose that feature.. OK, I will start with kernel side as the first step. > > (or it would be simpler to mark the pages something special when allocating, > but I don't feel like it's easy to change kernel to do so.) Yes, I agree. From kernel side, the page is a normal user space page, there should not be exception. Thanks, Pingfan _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
