linux-kernel - Re: slow boot with 7fef431be9c9 ("mm/page_alloc: place pages to tail in __free_pages

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Message-ID: <41dc97ec-d3ab-07b1-d7e3-84dc2bced8fc@redhat.com>
Date:   Tue, 16 Mar 2021 12:10:26 +0100
From:   David Hildenbrand <david@...hat.com>
To:     "Liang, Liang (Leo)" <Liang.Liang@....com>,
        Mike Rapoport <rppt@...ux.ibm.com>
Cc:     "Deucher, Alexander" <Alexander.Deucher@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Huang, Ray" <Ray.Huang@....com>,
        "Koenig, Christian" <Christian.Koenig@....com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        George Kennedy <george.kennedy@...cle.com>
Subject: Re: slow boot with 7fef431be9c9 ("mm/page_alloc: place pages to tail
 in __free_pages_core()")

On 16.03.21 12:02, Liang, Liang (Leo) wrote:
> [AMD Public Use]
> 
> Hi David and Mike,
> 
> It's BIOS buggy. Now fixed by new BIOS. Thanks you so much! Cheers!
> 
> [    0.000034] MTRR variable ranges enabled:
> [    0.000035]   0 base 000000000000 mask FFFF80000000 write-back
> [    0.000037]   1 base 0000FFE00000 mask FFFFFFE00000 write-protect
> [    0.000039]   2 base 0000FFDE0000 mask FFFFFFFE0000 write-protect
> [    0.000040]   3 base 0000FF000000 mask FFFFFFF80000 write-protect
> [    0.000041]   4 disabled
> [    0.000042]   5 disabled
> [    0.000043]   6 disabled
> [    0.000044]   7 disabled
> [    0.000045] TOM2: 0000000280000000 aka 10240M
> 
> root@...u-Chachani:/home/scbu# cat /proc/mtrr
> reg00: base=0x000000000 (    0MB), size= 2048MB, count=1: write-back
> reg01: base=0x0ffe00000 ( 4094MB), size=    2MB, count=1: write-protect
> reg02: base=0x0ffde0000 ( 4093MB), size=  128KB, count=1: write-protect
> reg03: base=0x0ff000000 ( 4080MB), size=  512KB, count=1: write-protect

Great :)

(another latent BUG found with 7fef431be9c9 :) )

-- 
Thanks,

David / dhildenb