On Mon, 03 Jun 2024 22:52:37 -0700 Kees Cook <kees@xxxxxxxxxx> wrote: > On June 3, 2024 4:33:31 PM PDT, Steven Rostedt <rostedt@xxxxxxxxxxx> wrote: > >From: "Steven Rostedt (Google)" <rostedt@xxxxxxxxxxx> > > > >In order to allow for requesting a memory region that can be used for > >things like pstore on multiple machines where the memory layout is not the > >same, add a new option to the kernel command line called "reserve_mem". > > > >The format is: reserve_mem=nn:align:name > > > >Where it will find nn amount of memory at the given alignment of align. > >The name field is to allow another subsystem to retrieve where the memory > >was found. For example: > > > > reserve_mem=12M:4096:oops ramoops.mem_name=oops > > How does this interact with KASLR? It has chosen its physical location > before this parsing happens, so I'd expect this to fail once in a while, > unless the size/alignment is lucky enough that KASLR never uses that > portion of the physical memory... >
