On Mon, Jan 15, 2018 at 02:40:35PM -0800, Randy Dunlap wrote: >On 01/15/2018 04:40 AM, Chao Fan wrote: >> In current code, kaslr only has a method to avoid some memory regions, >> but no method to specify the regions for kaslr to extract. So kaslr >> may choose the wrong position sometimes, which will cause some other >> features fail. >> >> Here is a problem that kaslr may choose the memory region in movable >> nodes to extract kernel, which will make the nodes can't be hot-removed. >> To solve it, we can specify the memory region in immovable node. >> Create "kaslr_mem=" to store the regions in immovable nodes, where should >> be chosen by kaslr. >> >> Also change the "handle_mem_memmap" to "handle_mem_filter", since >> it will not only handle memmap parameter now. > >Hi, > >Are any of the kernel command-line parameters documented anywhere?
Hi, Sorry for that, not yet. Because the patchset has been discussed in mailing list for a long time, and changed for many times, I want to add the document after this version has been merged or ACKed. Thanks, Chao Fan > >Thanks. > >> Multiple regions can be specified, comma delimited. >> Considering the usage of memory, only support for 4 regions. >> 4 regions contains 2 nodes at least, enough for kernel to extract. >> >> Signed-off-by: Chao Fan <[email protected]> >> --- >> arch/x86/boot/compressed/kaslr.c | 73 >> ++++++++++++++++++++++++++++++++++++++-- >> 1 file changed, 70 insertions(+), 3 deletions(-) > > >-- >~Randy > >
