Re: [PATCH] x86: trim ram need to check if mtrr is there v3

[Jeremy Fitzhardinge]

Yinghai Lu wrote:
> On Jan 25, 2008 11:27 AM, Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:
>   
> > Ingo Molnar wrote:
> >     
> > > * Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:
> > >
> > >
> > >       
> > > > I was referring to:
> > > >
> > > > commit 6a4544a9c8b54b82893044cb53695502cc386f00
> > > > Author: Yinghai Lu <Yinghai.Lu@xxxxxxx>
> > > > Date:   Fri Jan 25 00:15:29 2008 +0100
> > > >
> > > >    x86_32: trim memory by updating e820 v3
> > > >
> > > > but you've answered the question...
> > > >
> > > >         
> > > yeah, i guess what i've pushed out just now is v3++. Does it work for
> > > you?
> > >
> > >       
> > Yes, it does.  And for the record:
> >
> > [root@qemu ~]# cat /proc/mtrr
> > [root@qemu ~]#
> >     
>
> so the boot msg say:
> WARNING: strange, CPU MTRRs all blank?
>   

Yes.

WARNING: strange, CPU MTRRs all blank?
------------[ cut here ]------------
WARNING: at /home/jeremy/hg/xen/paravirt/linux/arch/x86/kernel/cpu/mtrr/main.c:710 mtrr_trim_uncached_memory+0xf8/0x17b()
Modules linked in:
Pid: 0, comm: swapper Not tainted 2.6.24 #1938
[<c012804c>] warn_on_slowpath+0x41/0x51
[<c01285d4>] ? __call_console_drivers+0x4e/0x5a
[<c03c3e85>] ? _spin_unlock_irqrestore+0xf/0x2f
[<c03c3e91>] ? _spin_unlock_irqrestore+0x1b/0x2f
[<c012880c>] ? release_console_sem+0x1a0/0x1a8
[<c0128c1f>] ? vprintk+0x294/0x2ee
[<c0128c2b>] ? vprintk+0x2a0/0x2ee
[<c04e811b>] ? __alloc_bootmem_core+0x100/0x27a
[<c0128c8e>] ? printk+0x15/0x17
[<c0128c8e>] ? printk+0x15/0x17
[<c04de51e>] mtrr_trim_uncached_memory+0xf8/0x17b
[<c04de7ae>] ? mtrr_bp_init+0x20d/0x215
[<c04dc79b>] setup_arch+0x283/0x3c2
[<c0128c8e>] ? printk+0x15/0x17
[<c04d6689>] start_kernel+0x60/0x311
=======================

	J


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