Date: Thu, 1 Sep 2016 14:45:00 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Slawa Olhovchenkov <slw@zxy.spb.ru> Cc: stable@freebsd.org, avg@freebsd.org Subject: Re: X2APIC support Message-ID: <20160901114500.GJ83214@kib.kiev.ua> In-Reply-To: <20160901112724.GX88122@zxy.spb.ru> References: <20151212130615.GE70867@zxy.spb.ru> <20151212133513.GL82577@kib.kiev.ua> <20160901112724.GX88122@zxy.spb.ru>
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On Thu, Sep 01, 2016 at 02:27:24PM +0300, Slawa Olhovchenkov wrote: > On Sat, Dec 12, 2015 at 03:35:13PM +0200, Konstantin Belousov wrote: > > > On Sat, Dec 12, 2015 at 04:06:15PM +0300, Slawa Olhovchenkov wrote: > > > Does STABLE support X2APIC? > > > I see X2APIC related commits in CURRENT, what is status for STABLE? > > > I am try to enable X2APIC support on X10DRi and see kernel trap on > > > boot. > > > > x2APIC is only supported in HEAD. The code to parse processor x2APIC > > structures in MADT was committed, but AFAIK never tested on real hardware. > > > > There are no plans to merge this to stable/10. > > I am try now on real hardware and got kernel fault at boot when set in > BIOS X2APIC_OPT_OUT Flag to [Enable]. > https://s9.postimg.org/6mt8bu21b/fault2.jpg How do you know that the issue is due to that flag ? I doubt that BIOS would provide direct knob to manage that flag, since requesting that out-out only makes sense if BIOS is unable to handle x2APIC mode, e.g. in SMI handlers. How precisely the BIOS setting called which you frobbed ? Show complete verbose dmesg from the first line to backtrace. > > 0xffffffff80537e74 is /usr/src/sys/kern/subr_smp.c:959 And this is a topology probe code, which should not be affected by the x2APIC mode at all, except possibly due to longer format of the APIC IDs. I added Andrey to Cc:, he might give some more guidance. > > Boot success if X2APIC_OPT_OUT Flag set to [Disable] > Supermicro X10DRi, dual E5-2650v4
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