On Wed, Apr 11, 2018 at 7:12 PM, Nicholas Piggin <npig...@gmail.com> wrote: > For consideration: > > * Add IPv6 support built in + additional modules - Because it's 2018 maan. > * Add DEFERRED_STRUCT_PAGE_INIT - Let's see what breaks.
We did not find any benefits with this on a P8 in terms of boot time with large memory. May be worth reinvestigating > * Add PPC_MEMTRACE - Small powernv debugfs driver for getting hardware traces. > * Add MEMORY_FAILURE - Machine check exceptions can now drive memory failure. > * Turn on FANOTIFY - This is the current filesystem notification feature. > * Turn on SCOM_DEBUGFS - Handy for hardware/firmware debugging, security risk? Yep, should not be in defconfig, IMHO > * Turn on async SCSI scanning - Let's see what breaks. > > * Make a bunch of USB hid drivers modules. > * Make SCSI SG, SR, and FC modules - FC is huge. > * Make video drivers (except AST GPU) modules - Also huge. > * Add MLX5 driver as a module - Popular demand. > * Make PCI serial driver a module - Uncommon? > > * Get rid of /dev/port - Not used. > * Remove legacy BSD ttys - Long dead. > * Remove IDE - Deprecated and replaced with ATA. > * Remove WIRELESS - Until we get POWER9 laptops. > * Remove RAW - Long deprecated in favour of direct IO. > * Remove floppy, parport, and PS2 input devices - not supported. > * Remove virtio drivers, ballooning - We're host only. I still think its good to have them, may be as modules? Should I switch to powerpc64le_defconfig for a single config with everything -- same kernel as guest and bare metal? > * Remove PPP - Sorry Paulus. > * Make more things modules, NFS FS, RAM disk, netconsole, MS-DOS fs. > > This does not disable FTRACE options, that's just an optimisation the > defconfig target made. make powernv_defconfig adds those to .config. > > This results in a significantly smaller vmlinux: > > text data bss dec hex filename > 13121779 5284224 1383776 19789779 12df7d3 vmlinux > 12126273 4771930 1341464 18239667 11650b3 vmlinux > > Signed-off-by: Nicholas Piggin <npig...@gmail.com> > --- Balbir Singh.
