Re: [PATCH 0/1] speeding up cpu_up()

2015-05-05 Thread Borislav Petkov
On Mon, May 04, 2015 at 05:45:17PM -0500, Aravind Gopalakrishnan wrote: > Tested a delay of 0 on Fam10h and Fam15h Model 30h-3fh and both work fine. Cool, thanks for testing. > Feedback from asking internally about this is that we should be OK to move > to a no-delay default from K8 onwards. Als

Re: [PATCH 0/1] speeding up cpu_up()

2015-05-04 Thread Aravind Gopalakrishnan
On 5/3/2015 11:13 AM, Aravind Gopalakrishnan wrote: On 5/1/15 7:42 PM, Aravind Gopalakrishnan wrote: On 5/1/15 5:47 PM, Borislav Petkov wrote: Aravind and I could probably test on a couple of AMD boxes to narrow down. @Aravind, see here: https://lkml.kernel.org/r/87d69aab88c14d65ae1e7be550

Re: [PATCH 0/1] speeding up cpu_up()

2015-05-03 Thread Aravind Gopalakrishnan
On 5/1/15 7:42 PM, Aravind Gopalakrishnan wrote: On 5/1/15 5:47 PM, Borislav Petkov wrote: On Fri, May 01, 2015 at 02:42:39PM -0700, Len Brown wrote: On Mon, Apr 20, 2015 at 12:15 AM, Ingo Molnar wrote: So instead of playing games with an ancient delay, I'd suggest we install the 10 msec I

Re: [PATCH 0/1] speeding up cpu_up()

2015-05-01 Thread Aravind Gopalakrishnan
On 5/1/15 5:47 PM, Borislav Petkov wrote: On Fri, May 01, 2015 at 02:42:39PM -0700, Len Brown wrote: On Mon, Apr 20, 2015 at 12:15 AM, Ingo Molnar wrote: So instead of playing games with an ancient delay, I'd suggest we install the 10 msec INIT assertion wait as a platform quirk instead, and

Re: [PATCH 0/1] speeding up cpu_up()

2015-05-01 Thread Borislav Petkov
On Fri, May 01, 2015 at 02:42:39PM -0700, Len Brown wrote: > On Mon, Apr 20, 2015 at 12:15 AM, Ingo Molnar wrote: > > > So instead of playing games with an ancient delay, I'd suggest we > > install the 10 msec INIT assertion wait as a platform quirk instead, > > and activate it for all CPUs/syste

Re: [PATCH 0/1] speeding up cpu_up()

2015-05-01 Thread Len Brown
On Mon, Apr 20, 2015 at 12:15 AM, Ingo Molnar wrote: > So instead of playing games with an ancient delay, I'd suggest we > install the 10 msec INIT assertion wait as a platform quirk instead, > and activate it for all CPUs/systems that we think might need it, with > a sufficiently robust and futu

Re: [PATCH 0/1] speeding up cpu_up()

2015-04-20 Thread Ingo Molnar
* Len Brown wrote: > The following patch... > > [PATCH 1/1] x86: replace cpu_up hard-coded mdelay with variable > > enables reducing cpu_up() time by 10ms on modern systems. > > This means that for every processor in the system, > boot-time and resume-time can be reduced by 10ms per-processor