On Sat 25-06-16 09:20:06, Chenjie (K) wrote: > > > On 2016/6/23 20:42, Michal Hocko wrote: > > On Fri 24-06-16 01:30:10, [email protected] wrote: > > > From: chenjie <[email protected]> > > > > > > cat /dev/kmem and echo > /dev/kmem will lead panic > > > > Writing to /dev/kmem without being extremely careful is a disaster AFAIK > > and even reading from the file can lead to unexpected results. Anyway > > I am trying to understand what exactly you are trying to fix here. Why > > writing to/reading from zero pfn should be any special wrt. any other > > potentially dangerous addresses > > > > cat /dev/mem not panic. cat /dev/kmem, just the user's operation for > nothing.
I am sorry, but I do not follow. Could you be more specific please? -- Michal Hocko SUSE Labs
