Re: unwind_init() takes 100 ms

2018-10-08 Thread Ingo Molnar
* Josh Poimboeuf wrote: > > 4. Would a command line parameter be reasonable `disable_unwind`, so people > > could decrease their boot time with distribution kernels, and easily turn it > > back on, when they need a stacktrace without having to rebuild the Linux > > kernel? > > I think a boot

Re: unwind_init() takes 100 ms

2018-10-08 Thread Ingo Molnar
* Josh Poimboeuf wrote: > On Mon, Oct 08, 2018 at 12:34:17PM -0500, Josh Poimboeuf wrote: > > > 4. Would a command line parameter be reasonable `disable_unwind`, so > > > people > > > could decrease their boot time with distribution kernels, and easily turn > > > it > > > back on, when they

Re: unwind_init() takes 100 ms

2018-10-08 Thread Josh Poimboeuf
On Mon, Oct 08, 2018 at 12:34:17PM -0500, Josh Poimboeuf wrote: > > 4. Would a command line parameter be reasonable `disable_unwind`, so people > > could decrease their boot time with distribution kernels, and easily turn it > > back on, when they need a stacktrace without having to rebuild the Li

Re: unwind_init() takes 100 ms

2018-10-08 Thread Josh Poimboeuf
On Mon, Oct 08, 2018 at 11:52:46AM +0200, Paul Menzel wrote: > Dear Josh, dear Linux folks, > > > Trying to decrease the boot time of the 64-bit Linux kernel (Linux 4.19-rc7 > (0238df64)) on a Asus F2A85-M PRO with an AMD processor, I noticed > `unwind_init()` called from `setup_arch()` `arch/x86

unwind_init() takes 100 ms

2018-10-08 Thread Paul Menzel
Dear Josh, dear Linux folks, Trying to decrease the boot time of the 64-bit Linux kernel (Linux 4.19-rc7 (0238df64)) on a Asus F2A85-M PRO with an AMD processor, I noticed `unwind_init()` called from `setup_arch()` `arch/x86/kernel/setup.c` takes over 100 ms to initialize according to Linux