Messages in this thread | | | Subject | Re: Hibernate resume bug around 3,18-rc2 - Full PAT support | From | Juergen Gross <> | Date | Fri, 20 Nov 2015 09:47:08 +0100 |
| |
On 20/11/15 06:25, Vassilis Virvilis wrote: > On 11/19/2015 10:35 PM, Vassilis Virvilis wrote: >> >> I compiled and I am running 4.3 right now. >> > > It failed this morning. Last night I did 3 hibernate / resume cycles. In > the last one I I also turned off the PSU (this seems to push it over the > edge - but it may be random behavior) and it worked. This morning 7h > later failed to resume - but it didn't hang on _lapic_resume. This time > it rebooted - and I seem to recall this behavior for 4.2+ kernels. I > forgot to mention it because my testing with 4.x kernels were one month > before. > > So 4.3 kernel - reboots on resume after a long hibernation time. > > I am testing with 4.3 and nopat right now.
I've just found a potential issue: In case MTRR is disabled by the BIOS the PAT register of the boot processor won't be restored after resume.
Can you check whether pr_info("MTRR: Disabled\n") has been executed in early boot? If yes, this might be a BIOS option.
Juergen
| |