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From: Baoquan He <bhe@redhat.com>
To: Jiri Bohac <jbohac@suse.cz>
Cc: Toshi Kani <toshi.kani@hpe.com>, David Airlie <airlied@linux.ie>,
	kexec@lists.infradead.org, linux-kernel@vger.kernel.org,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Dave Young <dyoung@redhat.com>, Vivek Goyal <vgoyal@redhat.com>
Subject: Re: [PATCH] x86/kexec: Exclude GART aperture from vmcore
Date: Mon, 6 Nov 2017 17:27:29 +0800	[thread overview]
Message-ID: <20171106092729.GB3669@x1> (raw)
In-Reply-To: <20171106090155.p7jhe2m57whfxma3@dwarf.suse.cz>

Hi Jiri,

Thanks for providing these information.

On 11/06/17 at 10:01am, Jiri Bohac wrote:
> Hi Baoquan,
> 
> 	[    0.000000] memblock_reserve: [0x00000000b8000000-0x00000000bbffffff] gart_iommu_hole_init+0x396/0x4b6
> 	[    0.000000] AGP: Mapping aperture over RAM [mem 0xb8000000-0xbbffffff] (65536KB)
> ^^^^^

> /proc/iomem:
> 	00000000-00000fff : Reserved
> 	00001000-0009d7ff : System RAM
> 	0009d800-0009ffff : Reserved
> 	000a0000-000bffff : PCI Bus 0000:00
> 	000c0000-000cafff : PCI Bus 0000:00
> 	  000c0000-000cafff : Video ROM
> 	000cb000-000ccfff : Adapter ROM
> 	000ce000-000fffff : Reserved
> 	  000f0000-000fffff : System ROM
> 	00100000-c7e7ffff : System RAM
> 	  0b000000-0b792eb5 : Kernel code
> 	  0b792eb6-0bd5d47f : Kernel data
> 	  0c274000-0c3c8fff : Kernel bss
> 	  b7000000-c6ffffff : Crash kernel

It's weird, gart aperture located in crashkernel region? Or we need
reserve the low crashkernel memory for gart aperture usage, Just like
swiotlb?

Sorry, I am not familiar with gart.

Thanks
Baoquan


> 	c7e80000-c7e8afff : ACPI Tables
> 	c7e8b000-c7e8cfff : ACPI Non-volatile Storage
> 	c7e8d000-c7ffffff : Reserved
> 	c8000000-ce0fffff : PCI Bus 0000:00
> 	  c8000000-c80003ff : IOAPIC 1
> 	  c8014000-c80143ff : 0000:00:11.0
> 	    c8014000-c80143ff : ahci
> 	  c8014400-c80144ff : 0000:00:12.2
> 	    c8014400-c80144ff : ehci_hcd
 
 

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WARNING: multiple messages have this Message-ID (diff)
From: Baoquan He <bhe@redhat.com>
To: Jiri Bohac <jbohac@suse.cz>
Cc: David Airlie <airlied@linux.ie>, Dave Young <dyoung@redhat.com>,
	Vivek Goyal <vgoyal@redhat.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Toshi Kani <toshi.kani@hpe.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
	linux-kernel@vger.kernel.org, kexec@lists.infradead.org,
	Borislav Petkov <bp@alien8.de>
Subject: Re: [PATCH] x86/kexec: Exclude GART aperture from vmcore
Date: Mon, 6 Nov 2017 17:27:29 +0800	[thread overview]
Message-ID: <20171106092729.GB3669@x1> (raw)
In-Reply-To: <20171106090155.p7jhe2m57whfxma3@dwarf.suse.cz>

Hi Jiri,

Thanks for providing these information.

On 11/06/17 at 10:01am, Jiri Bohac wrote:
> Hi Baoquan,
> 
> 	[    0.000000] memblock_reserve: [0x00000000b8000000-0x00000000bbffffff] gart_iommu_hole_init+0x396/0x4b6
> 	[    0.000000] AGP: Mapping aperture over RAM [mem 0xb8000000-0xbbffffff] (65536KB)
> ^^^^^

> /proc/iomem:
> 	00000000-00000fff : Reserved
> 	00001000-0009d7ff : System RAM
> 	0009d800-0009ffff : Reserved
> 	000a0000-000bffff : PCI Bus 0000:00
> 	000c0000-000cafff : PCI Bus 0000:00
> 	  000c0000-000cafff : Video ROM
> 	000cb000-000ccfff : Adapter ROM
> 	000ce000-000fffff : Reserved
> 	  000f0000-000fffff : System ROM
> 	00100000-c7e7ffff : System RAM
> 	  0b000000-0b792eb5 : Kernel code
> 	  0b792eb6-0bd5d47f : Kernel data
> 	  0c274000-0c3c8fff : Kernel bss
> 	  b7000000-c6ffffff : Crash kernel

It's weird, gart aperture located in crashkernel region? Or we need
reserve the low crashkernel memory for gart aperture usage, Just like
swiotlb?

Sorry, I am not familiar with gart.

Thanks
Baoquan


> 	c7e80000-c7e8afff : ACPI Tables
> 	c7e8b000-c7e8cfff : ACPI Non-volatile Storage
> 	c7e8d000-c7ffffff : Reserved
> 	c8000000-ce0fffff : PCI Bus 0000:00
> 	  c8000000-c80003ff : IOAPIC 1
> 	  c8014000-c80143ff : 0000:00:11.0
> 	    c8014000-c80143ff : ahci
> 	  c8014400-c80144ff : 0000:00:12.2
> 	    c8014400-c80144ff : ehci_hcd
 
 

  reply	other threads:[~2017-11-06  9:28 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-11-03 17:28 [PATCH] x86/kexec: Exclude GART aperture from vmcore Jiri Bohac
2017-11-03 17:28 ` Jiri Bohac
2017-11-06  2:41 ` Baoquan He
2017-11-06  2:41   ` Baoquan He
2017-11-06  9:01   ` Jiri Bohac
2017-11-06  9:01     ` Jiri Bohac
2017-11-06  9:27     ` Baoquan He [this message]
2017-11-06  9:27       ` Baoquan He
2017-11-06  9:56       ` Jiri Bohac
2017-11-06  9:56         ` Jiri Bohac
2017-11-07 11:39         ` Baoquan He
2017-11-07 11:39           ` Baoquan He
2017-11-07 13:42           ` Jiri Bohac
2017-11-07 13:42             ` Jiri Bohac
2017-11-07 15:34             ` Jiri Bohac
2017-11-07 15:34               ` Jiri Bohac
2017-11-12  8:04               ` Baoquan He
2017-11-12  8:04                 ` Baoquan He
2017-11-12 10:23                 ` Baoquan He
2017-11-12 10:23                   ` Baoquan He
2017-11-28 21:58                 ` Jiri Bohac
2017-11-28 21:58                   ` Jiri Bohac
2017-11-29  2:43                   ` Baoquan He
2017-11-29  2:43                     ` Baoquan He
2017-11-29 12:27                     ` Jiri Bohac
2017-11-29 12:27                       ` Jiri Bohac

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