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From: "Liang, Liang (Leo)" <Liang.Liang@amd.com>
To: David Hildenbrand <david@redhat.com>, Mike Rapoport <rppt@linux.ibm.com>
Cc: "Deucher, Alexander" <Alexander.Deucher@amd.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	amd-gfx list <amd-gfx@lists.freedesktop.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	"Huang, Ray" <Ray.Huang@amd.com>,
	"Koenig, Christian" <Christian.Koenig@amd.com>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	George Kennedy <george.kennedy@oracle.com>
Subject: RE: slow boot with 7fef431be9c9 ("mm/page_alloc: place pages to tail in __free_pages_core()")
Date: Tue, 16 Mar 2021 08:58:35 +0000	[thread overview]
Message-ID: <MW3PR12MB4537B6D5911092E456220818F36B9@MW3PR12MB4537.namprd12.prod.outlook.com> (raw)
In-Reply-To: <b9b324e4-4c98-b81d-ddae-52e4feb33064@redhat.com>

[AMD Public Use]

Hi David,

root@scbu-Chachani:~# 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=0x100000000 ( 4096MB), size=   16MB, count=1: write-protect
reg03: base=0x0ffde0000 ( 4093MB), size=  128KB, count=1: write-protect
reg04: base=0x0ff000000 ( 4080MB), size=  512KB, count=1: write-protect

BRs,
Leo
-----Original Message-----
From: David Hildenbrand <david@redhat.com> 
Sent: Tuesday, March 16, 2021 4:54 PM
To: Liang, Liang (Leo) <Liang.Liang@amd.com>; Mike Rapoport <rppt@linux.ibm.com>
Cc: Deucher, Alexander <Alexander.Deucher@amd.com>; linux-kernel@vger.kernel.org; amd-gfx list <amd-gfx@lists.freedesktop.org>; Andrew Morton <akpm@linux-foundation.org>; Huang, Ray <Ray.Huang@amd.com>; Koenig, Christian <Christian.Koenig@amd.com>; Rafael J. Wysocki <rafael@kernel.org>; George Kennedy <george.kennedy@oracle.com>
Subject: Re: slow boot with 7fef431be9c9 ("mm/page_alloc: place pages to tail in __free_pages_core()")

On 16.03.21 09:43, Liang, Liang (Leo) wrote:
> [AMD Public Use]
> 
> Hi David,
> 
> Thanks for your explanation. We saw slow boot issue on our farm/QA's machines and mine. All of machines are same SoC/board.

I cannot spot anything really special in the logs -- it's just ordinary system ram -- except:

[    0.000027] MTRR fixed ranges enabled:
[    0.000028]   00000-9FFFF write-back
[    0.000029]   A0000-BFFFF uncachable
[    0.000030]   C0000-FFFFF write-through
[    0.000031] MTRR variable ranges enabled:
[    0.000032]   0 base 000000000000 mask FFFF80000000 write-back
[    0.000034]   1 base 0000FFE00000 mask FFFFFFE00000 write-protect
[    0.000035]   2 base 000100000000 mask FFFFFF000000 write-protect
[    0.000036]   3 base 0000FFDE0000 mask FFFFFFFE0000 write-protect
[    0.000038]   4 base 0000FF000000 mask FFFFFFF80000 write-protect
[    0.000039]   5 disabled
[    0.000039]   6 disabled
[    0.000040]   7 disabled

Not sure if "2 base 000100000000" indicates something nasty. Not sure how to interpret the masks.

Can you provide the output of "cat /proc/mtrr" ?

--
Thanks,

David / dhildenb

WARNING: multiple messages have this Message-ID (diff)
From: "Liang, Liang (Leo)" <Liang.Liang@amd.com>
To: David Hildenbrand <david@redhat.com>, Mike Rapoport <rppt@linux.ibm.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	amd-gfx list <amd-gfx@lists.freedesktop.org>,
	George Kennedy <george.kennedy@oracle.com>,
	"Huang, Ray" <Ray.Huang@amd.com>,
	"Deucher, Alexander" <Alexander.Deucher@amd.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	"Koenig, Christian" <Christian.Koenig@amd.com>
Subject: RE: slow boot with 7fef431be9c9 ("mm/page_alloc: place pages to tail in __free_pages_core()")
Date: Tue, 16 Mar 2021 08:58:35 +0000	[thread overview]
Message-ID: <MW3PR12MB4537B6D5911092E456220818F36B9@MW3PR12MB4537.namprd12.prod.outlook.com> (raw)
In-Reply-To: <b9b324e4-4c98-b81d-ddae-52e4feb33064@redhat.com>

[AMD Public Use]

Hi David,

root@scbu-Chachani:~# 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=0x100000000 ( 4096MB), size=   16MB, count=1: write-protect
reg03: base=0x0ffde0000 ( 4093MB), size=  128KB, count=1: write-protect
reg04: base=0x0ff000000 ( 4080MB), size=  512KB, count=1: write-protect

BRs,
Leo
-----Original Message-----
From: David Hildenbrand <david@redhat.com> 
Sent: Tuesday, March 16, 2021 4:54 PM
To: Liang, Liang (Leo) <Liang.Liang@amd.com>; Mike Rapoport <rppt@linux.ibm.com>
Cc: Deucher, Alexander <Alexander.Deucher@amd.com>; linux-kernel@vger.kernel.org; amd-gfx list <amd-gfx@lists.freedesktop.org>; Andrew Morton <akpm@linux-foundation.org>; Huang, Ray <Ray.Huang@amd.com>; Koenig, Christian <Christian.Koenig@amd.com>; Rafael J. Wysocki <rafael@kernel.org>; George Kennedy <george.kennedy@oracle.com>
Subject: Re: slow boot with 7fef431be9c9 ("mm/page_alloc: place pages to tail in __free_pages_core()")

On 16.03.21 09:43, Liang, Liang (Leo) wrote:
> [AMD Public Use]
> 
> Hi David,
> 
> Thanks for your explanation. We saw slow boot issue on our farm/QA's machines and mine. All of machines are same SoC/board.

I cannot spot anything really special in the logs -- it's just ordinary system ram -- except:

[    0.000027] MTRR fixed ranges enabled:
[    0.000028]   00000-9FFFF write-back
[    0.000029]   A0000-BFFFF uncachable
[    0.000030]   C0000-FFFFF write-through
[    0.000031] MTRR variable ranges enabled:
[    0.000032]   0 base 000000000000 mask FFFF80000000 write-back
[    0.000034]   1 base 0000FFE00000 mask FFFFFFE00000 write-protect
[    0.000035]   2 base 000100000000 mask FFFFFF000000 write-protect
[    0.000036]   3 base 0000FFDE0000 mask FFFFFFFE0000 write-protect
[    0.000038]   4 base 0000FF000000 mask FFFFFFF80000 write-protect
[    0.000039]   5 disabled
[    0.000039]   6 disabled
[    0.000040]   7 disabled

Not sure if "2 base 000100000000" indicates something nasty. Not sure how to interpret the masks.

Can you provide the output of "cat /proc/mtrr" ?

--
Thanks,

David / dhildenb
_______________________________________________
amd-gfx mailing list
amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx

  reply	other threads:[~2021-03-16  8:59 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-11 14:41 slow boot with 7fef431be9c9 ("mm/page_alloc: place pages to tail in __free_pages_core()") Deucher, Alexander
2021-03-11 14:41 ` Deucher, Alexander
2021-03-11 15:02 ` David Hildenbrand
2021-03-11 15:02   ` David Hildenbrand
2021-03-12 14:06   ` Deucher, Alexander
2021-03-12 14:06     ` Deucher, Alexander
2021-03-12 14:12     ` David Hildenbrand
2021-03-12 14:12       ` David Hildenbrand
2021-03-12 15:39       ` Deucher, Alexander
2021-03-12 15:39         ` Deucher, Alexander
2021-03-12 15:48         ` David Hildenbrand
2021-03-12 15:48           ` David Hildenbrand
2021-03-12 16:15           ` Deucher, Alexander
2021-03-12 16:15             ` Deucher, Alexander
2021-03-12 16:19         ` Liang, Liang (Leo)
2021-03-12 16:19           ` Liang, Liang (Leo)
2021-03-12 16:46           ` David Hildenbrand
2021-03-12 16:46             ` David Hildenbrand
2021-03-13  4:04             ` Liang, Liang (Leo)
2021-03-13  4:04               ` Liang, Liang (Leo)
2021-03-13  9:05               ` David Hildenbrand
2021-03-13  9:05                 ` David Hildenbrand
2021-03-13 13:48                 ` Mike Rapoport
2021-03-13 13:48                   ` Mike Rapoport
2021-03-15 13:04                   ` David Hildenbrand
2021-03-15 13:04                     ` David Hildenbrand
2021-03-16  0:36                     ` Liang, Liang (Leo)
2021-03-16  0:36                       ` Liang, Liang (Leo)
2021-03-16  6:50                       ` Mike Rapoport
2021-03-16  6:50                         ` Mike Rapoport
2021-03-16  8:00                         ` Liang, Liang (Leo)
2021-03-16  8:00                           ` Liang, Liang (Leo)
2021-03-16  8:37                           ` David Hildenbrand
2021-03-16  8:37                             ` David Hildenbrand
2021-03-16  8:43                             ` Liang, Liang (Leo)
2021-03-16  8:43                               ` Liang, Liang (Leo)
2021-03-16  8:54                               ` David Hildenbrand
2021-03-16  8:54                                 ` David Hildenbrand
2021-03-16  8:58                                 ` Liang, Liang (Leo) [this message]
2021-03-16  8:58                                   ` Liang, Liang (Leo)
2021-03-16  9:08                                   ` David Hildenbrand
2021-03-16  9:08                                     ` David Hildenbrand
2021-03-16 10:30                                     ` Mike Rapoport
2021-03-16 10:30                                       ` Mike Rapoport
2021-03-16 11:02                                       ` Liang, Liang (Leo)
2021-03-16 11:02                                         ` Liang, Liang (Leo)
2021-03-16 11:10                                         ` David Hildenbrand
2021-03-16 11:10                                           ` David Hildenbrand

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