On Thu 02-11-17 12:10:39, Pavel Tatashin wrote: > > > > > > Yes, but as I said, unfortunately memset(1) with CONFIG_VM_DEBUG does not > > > catch this case. So, when CONFIG_VM_DEBUG is enabled kexec reboots without > > > issues. > > > > Can we make the init pattern to catch this? > > Unfortunately, that is not easy: memset() gives us only one byte to play > with, and if we use something else that will make CONFIG_VM_DEBUG > unacceptably slow.
Why cannot we do something similar to the optimized struct page initialization and write 8B at the time and fill up the size unaligned chunk in 1B? -- Michal Hocko SUSE Labs
