Date: Mon, 16 May 2016 14:44:22 +0200 From: Gary Jennejohn <gljennjohn@gmail.com> To: Konstantin Belousov <kostikbel@gmail.com> Cc: current@FreeBSD.org Subject: Re: EARLY_AP_STARTUP hangs during boot Message-ID: <20160516144422.4686058c@ernst.home> In-Reply-To: <20160516103835.GT89104@kib.kiev.ua> References: <20160516122242.39249a54@ernst.home> <20160516122731.65a8614a@ernst.home> <20160516103835.GT89104@kib.kiev.ua>
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On Mon, 16 May 2016 13:38:35 +0300 Konstantin Belousov <kostikbel@gmail.com> wrote: > On Mon, May 16, 2016 at 12:27:31PM +0200, Gary Jennejohn wrote: > > On Mon, 16 May 2016 12:22:42 +0200 > > Gary Jennejohn <gljennjohn@gmail.com> wrote: > > > > > I tried out EARLY_AP_STARTUP, but the kernel hangs and I can't > > > break into DDB. > > > > > > I did a verbose boot and the last lines I see are related to routing > > > MSI-X to various local APIC vectors. I copied the last few lines and > > > they look like this: > > > > > > msi: routing MSI-X IRQ 256 to local APIC 2 vector 48 > > > msi: routing MSI-X IRQ 257 to local APIC 3 vector 48 > > > msi: routing MSI-X IRQ 258 to local APIC 4 vector 48 > > > msi: routing MSI-X IRQ 256 to local APIC 0 vector 49 > > > > Oops, the the last line should read > > msi: Assigning MSI-X IRQ 256 to local APIC 0 vector 49 > You should be able to enter ddb at this point. Methods depend on the > console used, serial break for serial console, ctrl-alt-esc for sc/vt > AFAIR. If you have IPMI/DRAC/ILO, send nmi. > > After getting at ddb> prompt, do 'bt' then 'ps' then 'alltrace' and > show the output. I tried ctrl-alt-esc, nothing happens. Maybe because USB isn't up yet. Judging from the way the case fan starts ramping up it seems like the CPU is in a tight loop. -- Gary Jennejohn
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