sable-memory-range = " property to crash dump
kernel. Now, we pass
"linux,usable-memory-range = " to crash
dump kernel to support two crash kernel regions and load crash
kernel high.
Signed-off-by: Chen Zhou
---
kexec/arch/arm64/crashdump-arm64.c | 44 +--
After commit (arm64: kdump: support reserving crashkernel above 4G),
there may be two crash kernel regions, one is below 4G, the other is
above 4G.
Crash dump kernel reads more than one crash kernel regions via a dtb
property under node /chosen,
linux,usable-memory-range =
Signed-off-by: Chen
node /chosen,
linux,usable-memory-range = .
Besides, we need to modify kexec-tools:
arm64: support more than one crash kernel regions
Chen Zhou (3):
arm64: kdump: support reserving crashkernel above 4G
arm64: kdump: support more than one crash kernel regions
kdump: update Documentation
-off-by: Chen Zhou
---
arch/arm64/kernel/setup.c | 3 ++
arch/arm64/mm/init.c | 71 +--
2 files changed, 71 insertions(+), 3 deletions(-)
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index 413d566..82cd9a0 100644
--- a/arch
Now we support crashkernel=X,[high,low] on arm64, update the
Documentation.
Signed-off-by: Chen Zhou
---
Documentation/admin-guide/kernel-parameters.txt | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt
b/Documentation/admin
Hi Mike,
On 2019/4/3 19:29, Mike Rapoport wrote:
> On Wed, Apr 03, 2019 at 11:05:45AM +0800, Chen Zhou wrote:
>> After commit (arm64: kdump: support reserving crashkernel above 4G),
>> there may be two crash kernel regions, one is below 4G, the other is
>> above 4G.
>>
Hi Mike,
On 2019/4/4 22:44, Mike Rapoport wrote:
> Hi,
>
> On Wed, Apr 03, 2019 at 09:51:27PM +0800, Chen Zhou wrote:
>> Hi Mike,
>>
>> On 2019/4/3 19:29, Mike Rapoport wrote:
>>> On Wed, Apr 03, 2019 at 11:05:45AM +0800, Chen Zhou wrote:
>>>&g
Hi Mike,
On 2019/4/4 22:46, Mike Rapoport wrote:
> Hi,
>
> On Wed, Apr 03, 2019 at 11:05:44AM +0800, Chen Zhou wrote:
>> When crashkernel is reserved above 4G in memory, kernel should
>> reserve some amount of low memory for swiotlb and some DMA buffers.
>>
>>
Hi Mike,
On 2019/4/5 10:17, Chen Zhou wrote:
> Hi Mike,
>
> On 2019/4/4 22:44, Mike Rapoport wrote:
>> Hi,
>>
>> On Wed, Apr 03, 2019 at 09:51:27PM +0800, Chen Zhou wrote:
>>> Hi Mike,
>>>
>>> On 2019/4/3 19:29, Mike Rapoport wrote:
>>
Hi Mike,
On 2019/4/8 14:57, Mike Rapoport wrote:
> Hi,
>
> On Fri, Apr 05, 2019 at 11:47:27AM +0800, Chen Zhou wrote:
>> Hi Mike,
>>
>> On 2019/4/5 10:17, Chen Zhou wrote:
>>> Hi Mike,
>>>
>>> On 2019/4/4 22:44, Mike Rapoport wrote:
>&
below:
Link:
https://lore.kernel.org/linux-arm-kernel/20190403030546.23718-1-chenzho...@huawei.com/T/#t
Signed-off-by: Chen Zhou
---
kexec/arch/arm64/crashdump-arm64.c | 44 +
kexec/arch/arm64/crashdump-arm64.h | 3 +-
kexec/arch/arm64/ke
Hi Mike,
On 2019/4/8 16:39, Chen Zhou wrote:
>>>
>>> Sorry, just ignore my previous reply, I got that wrong.
>>>
>>> I think it carefully, we can cap the memory range for [min(regs[*].start,
>>> max(regs[*].end)]
>>> firstly. B
-off-by: Chen Zhou
---
arch/arm64/include/asm/kexec.h | 3 ++
arch/arm64/kernel/setup.c | 3 ++
arch/arm64/mm/init.c | 26 +
arch/x86/include/asm/kexec.h | 3 ++
arch/x86/kernel/setup.c| 66 +-
include/linux/kexec.h
After commit (arm64: kdump: support reserving crashkernel above 4G),
there may be two crash kernel regions, one is below 4G, the other is
above 4G.
Crash dump kernel reads more than one crash kernel regions via a dtb
property under node /chosen,
linux,usable-memory-range =
Signed-off-by: Chen
Now we support crashkernel=X,[high,low] on arm64, update the
Documentation.
Signed-off-by: Chen Zhou
---
Documentation/admin-guide/kernel-parameters.txt | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt
b/Documentation/admin
/022792.html
[v1]: https://lkml.org/lkml/2019/4/8/628
Chen Zhou (3):
arm64: kdump: support reserving crashkernel above 4G
arm64: kdump: support more than one crash kernel regions
kdump: update Documentation about crashkernel on arm64
Documentation/admin-guide/kernel-parameters.txt | 4
Hi Bhupesh,
On 2019/4/9 13:20, Bhupesh Sharma wrote:
> Hi Chen,
>
> Thanks for the patchset.
>
> Before I review the patches in detail, I have a couple of generic queries.
> Please see them in-line:
>
> On 04/03/2019 11:05 AM, Chen Zhou wrote:
>> When crash
-off-by: Chen Zhou
---
arch/arm64/include/asm/kexec.h | 3 +++
arch/arm64/kernel/setup.c | 3 +++
arch/arm64/mm/init.c | 26 +-
3 files changed, 27 insertions(+), 5 deletions(-)
diff --git a/arch/arm64/include/asm/kexec.h b/arch/arm64/include/asm/kexec.h
In preparation for supporting more than one crash kernel regions
in arm64 as x86_64 does, move reserve_crashkernel_low() into
kexec/kexec_core.c.
Signed-off-by: Chen Zhou
---
arch/x86/include/asm/kexec.h | 3 ++
arch/x86/kernel/setup.c | 66
Now we support crashkernel=X,[high,low] on arm64, update the
Documentation.
Signed-off-by: Chen Zhou
---
Documentation/admin-guide/kernel-parameters.txt | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt
b/Documentation/admin
crash kernel regions
case, we cap the memory range [min(regs[*].start), max(regs[*].end)]
and then remove the memory range in the middle.
[1]: http://lists.infradead.org/pipermail/kexec/2019-April/022792.html
[v1]: https://lkml.org/lkml/2019/4/8/628
[v2]: https://lkml.org/lkml/2019/4/9/86
Chen Zh
After commit (arm64: kdump: support reserving crashkernel above 4G),
there may be two crash kernel regions, one is below 4G, the other is
above 4G.
Crash dump kernel reads more than one crash kernel regions via a dtb
property under node /chosen,
linux,usable-memory-range =
Signed-off-by: Chen
wrote:
> Hi,
>
> On Tue, Apr 09, 2019 at 06:28:18PM +0800, Chen Zhou wrote:
>> After commit (arm64: kdump: support reserving crashkernel above 4G),
>> there may be two crash kernel regions, one is below 4G, the other is
>> above 4G.
>>
>> Crash dump kernel re
Hi Ingo,
On 2019/4/10 15:09, Ingo Molnar wrote:
>
> * Chen Zhou wrote:
>
>> In preparation for supporting more than one crash kernel regions
>> in arm64 as x86_64 does, move reserve_crashkernel_low() into
>> kexec/kexec_core.c.
>>
>> Signed-off-by: Che
Hi Mike,
On 2019/4/11 20:17, Chen Zhou wrote:
> Hi Mike,
>
> This overall looks well.
> Replacing memblock_cap_memory_range() with memblock_cap_memory_ranges() was
> what i wanted
> to do in v1, sorry for don't express that clearly.
>
> But there are some issues as
Hi Mike,
On 2019/4/14 20:10, Mike Rapoport wrote:
> Hi,
>
> On Thu, Apr 11, 2019 at 08:17:43PM +0800, Chen Zhou wrote:
>> Hi Mike,
>>
>> This overall looks well.
>> Replacing memblock_cap_memory_range() with memblock_cap_memory_ranges() was
>> what i
Hi Mike,
On 2019/4/14 20:13, Mike Rapoport wrote:
> Hi,
>
> On Tue, Apr 09, 2019 at 06:28:18PM +0800, Chen Zhou wrote:
>> After commit (arm64: kdump: support reserving crashkernel above 4G),
>> there may be two crash kernel regions, one is below 4G, the other is
>>
]: https://lkml.org/lkml/2019/4/9/86
[V3]: https://lkml.org/lkml/2019/4/15/6
Chen Zhou (5):
x86: kdump: move reserve_crashkernel_low() into kexec_core.c
arm64: kdump: support reserving crashkernel above 4G
memblock: add memblock_cap_memory_ranges for multiple ranges
arm64: kdump: support mo
The memblock_cap_memory_range() removes all the memory except the
range passed to it. Extend this function to receive memblock_type
with the regions that should be kept.
Enable this function in arm64 for reservation of multiple regions
for the crash kernel.
Signed-off-by: Chen Zhou
Signed-off
In preparation for supporting more than one crash kernel regions
in arm64 as x86_64 does, move reserve_crashkernel_low() into
kexec/kexec_core.c.
Signed-off-by: Chen Zhou
---
arch/x86/include/asm/kexec.h | 3 ++
arch/x86/kernel/setup.c | 66
-off-by: Chen Zhou
---
arch/arm64/include/asm/kexec.h | 3 +++
arch/arm64/kernel/setup.c | 3 +++
arch/arm64/mm/init.c | 25 -
3 files changed, 26 insertions(+), 5 deletions(-)
diff --git a/arch/arm64/include/asm/kexec.h b/arch/arm64/include/asm/kexec.h
property under node /chosen,
linux,usable-memory-range = .
Besides, replace memblock_cap_memory_range() with
memblock_cap_memory_ranges().
Signed-off-by: Chen Zhou
Signed-off-by: Mike Rapoport
---
arch/arm64/mm/init.c | 34 --
include/linux/memblock.h | 1 -
mm
Now we support crashkernel=X,[high,low] on arm64, update the
Documentation.
Signed-off-by: Chen Zhou
---
Documentation/admin-guide/kernel-parameters.txt | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt
b/Documentation/admin
Hi Mike,
On 2019/4/16 3:09, Mike Rapoport wrote:
> Hi,
>
> On Mon, Apr 15, 2019 at 06:57:23PM +0800, Chen Zhou wrote:
>> The memblock_cap_memory_range() removes all the memory except the
>> range passed to it. Extend this function to receive memblock_type
>> with the
permail/kexec/2019-April/022792.html
[v1]: https://lkml.org/lkml/2019/4/8/628
[v2]: https://lkml.org/lkml/2019/4/9/86
[v3]: https://lkml.org/lkml/2019/4/15/6
[v4]: https://lkml.org/lkml/2019/4/15/273
Chen Zhou (4):
x86: kdump: move reserve_crashkernel_low() into kexec_core.c
arm64: kdump: support r
Now we support crashkernel=X,[high,low] on arm64, update the
Documentation.
Signed-off-by: Chen Zhou
---
Documentation/admin-guide/kernel-parameters.txt | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt
b/Documentation/admin
-off-by: Chen Zhou
---
arch/arm64/include/asm/kexec.h | 3 +++
arch/arm64/kernel/setup.c | 3 +++
arch/arm64/mm/init.c | 25 -
3 files changed, 26 insertions(+), 5 deletions(-)
diff --git a/arch/arm64/include/asm/kexec.h b/arch/arm64/include/asm/kexec.h
In preparation for supporting more than one crash kernel regions
in arm64 as x86_64 does, move reserve_crashkernel_low() into
kexec/kexec_core.c.
Signed-off-by: Chen Zhou
---
arch/x86/include/asm/kexec.h | 3 ++
arch/x86/kernel/setup.c | 66
ded memory.
Enable use of this function in arm64 for reservation of multiple
regions for the crash kernel.
Signed-off-by: Chen Zhou
---
arch/arm64/mm/init.c | 34 --
include/linux/memblock.h | 2 +-
mm/memblock.c| 44 -
g/pipermail/kexec/2019-April/022792.html
[v1]: https://lkml.org/lkml/2019/4/8/628
[v2]: https://lkml.org/lkml/2019/4/9/86
[v3]: https://lkml.org/lkml/2019/4/15/6
[v4]: https://lkml.org/lkml/2019/4/15/273
Chen Zhou (3):
x86: kdump: move reserve_crashkernel_low() into kexec_core.c
arm64: kdump
In preparation for supporting more than one crash kernel regions
in arm64 as x86_64 does, move reserve_crashkernel_low() into
kexec/kexec_core.c.
Signed-off-by: Chen Zhou
---
arch/x86/include/asm/kexec.h | 3 ++
arch/x86/kernel/setup.c | 66
-off-by: Chen Zhou
---
arch/arm64/include/asm/kexec.h | 3 +++
arch/arm64/kernel/setup.c | 3 +++
arch/arm64/mm/init.c | 25 -
3 files changed, 26 insertions(+), 5 deletions(-)
diff --git a/arch/arm64/include/asm/kexec.h b/arch/arm64/include/asm/kexec.h
remove the unneeded memory.
Enable use of this function in arm64 for reservation of multiple
regions for the crash kernel.
Signed-off-by: Mike Rapoport
Signed-off-by: Chen Zhou
---
arch/arm64/mm/init.c | 34 --
include/linux/memblock.h | 2 +-
mm/
Now we support crashkernel=X,[high,low] on arm64, update the
Documentation.
Signed-off-by: Chen Zhou
---
Documentation/admin-guide/kernel-parameters.txt | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt
b/Documentation/admin
g/lkml/2019/4/2/1174
[v2]: https://lkml.org/lkml/2019/4/9/86
[v3]: https://lkml.org/lkml/2019/4/9/306
[v4]: https://lkml.org/lkml/2019/4/15/273
Chen Zhou (3):
x86: kdump: move reserve_crashkernel_low() into kexec_core.c
arm64: kdump: support reserving crashkernel above 4G
kdump: update
Now we support crashkernel=X,[high,low] on arm64, update the
Documentation.
Signed-off-by: Chen Zhou
---
Documentation/admin-guide/kernel-parameters.txt | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt
b/Documentation
In preparation for supporting reserving crashkernel above 4G
in arm64 as x86_64 does, move reserve_crashkernel_low() into
kexec/kexec_core.c.
Signed-off-by: Chen Zhou
---
arch/x86/include/asm/kexec.h | 3 ++
arch/x86/kernel/setup.c | 66
,high" is specified.
Signed-off-by: Chen Zhou
---
arch/arm64/include/asm/kexec.h | 3 +++
arch/arm64/kernel/setup.c | 3 +++
arch/arm64/mm/init.c | 34 --
3 files changed, 34 insertions(+), 6 deletions(-)
diff --git a/arch/arm64/include/asm
remove the unneeded memory.
Enable use of this function in arm64 for reservation of multiple
regions for the crash kernel.
Signed-off-by: Mike Rapoport
Signed-off-by: Chen Zhou
---
arch/arm64/mm/init.c | 38 --
include/linux/memblock.h | 2 +-
mm/
across a larger range.
>
> Some comments inline and in respective patch threads..
>
> On 05/07/2019 09:20 AM, Chen Zhou wrote:
>> This patch series enable reserving crashkernel on high memory in arm64.
>
> Please fix the patch subject, it should be v5.
> Also please C
On 2019/5/15 13:16, Bhupesh Sharma wrote:
> On 05/07/2019 09:20 AM, Chen Zhou wrote:
>> Now we support crashkernel=X,[high,low] on arm64, update the
>> Documentation.
>>
>> Signed-off-by: Chen Zhou
>> ---
>> Documentation/admin-guide/kernel-parameter
Hi Simon,
On 2019/5/31 17:28, Simon Horman wrote:
> On Wed, Apr 03, 2019 at 10:55:04AM +0800, Chen Zhou wrote:
>> When crashkernel is reserved above 4G in memory, kernel should
>> reserve some amount of low memory for swiotlb and some DMA buffers.
>> So there may be two cras
Hi Catalin,
Sorry to ping you.
What's your suggestion about this patch series? I am looking forward to your
replay.
Thanks,
Chen Zhou
On 2019/5/16 11:19, Chen Zhou wrote:
> Hi Bhupesh,
>
> On 2019/5/15 13:06, Bhupesh Sharma wrote:
>> +Cc kexec-list.
>>
>> Hi
Hi James,
Thanks for your review.
On 2019/6/6 0:29, James Morse wrote:
> Hello,
>
> On 07/05/2019 04:50, Chen Zhou wrote:
>> In preparation for supporting reserving crashkernel above 4G
>> in arm64 as x86_64 does, move reserve_crashkernel_low() into
>> kexec/kexec_co
Hi James,
On 2019/6/6 0:29, James Morse wrote:
> Hello,
>
> On 07/05/2019 04:50, Chen Zhou wrote:
>> When crashkernel is reserved above 4G in memory, kernel should
>> reserve some amount of low memory for swiotlb and some DMA buffers.
>
>> Meanwhile, support cra
On 2019/6/6 0:32, James Morse wrote:
> Hi!
>
> On 07/05/2019 04:50, Chen Zhou wrote:
>> We use crashkernel=X to reserve crashkernel below 4G, which will fail
>> when there is no enough memory. Currently, crashkernel=Y@X can be used
>> to reserve crashkernel above 4
Hi Dave,
On 2019/6/12 16:45, Dave Young wrote:
> Other than the comments from James, can you move the function into
> kernel/crash_core.c, we already have some functions moved there for
> sharing.
Sure.
Thanks,
Chen Zhou
___
kexec mailing l
Currently, there is only one crash kernel region on arm64, we add
another region "crash kernel low" used for crash dump kernel devices.
To do this, we add DT property "linux,low-memory-range" to crash
dump kernel's dtb to pass the low region.
Signed-off-by: Chen Zhou
-
Crashkernel=X tries to reserve memory for the crash dump kernel under
4G. If crashkernel=X,low is specified simultaneously, reserve spcified
size low memory for crash kdump kernel devices firstly and then reserve
memory above 4G.
Signed-off-by: Chen Zhou
---
arch/arm64/include/asm/kexec.h | 3
ff-by: Chen Zhou
---
arch/x86/include/asm/kexec.h | 3 ++
arch/x86/kernel/setup.c | 65
include/linux/crash_core.h | 4 +++
include/linux/kexec.h| 1 -
kernel/crash_core.c | 65
5
erty under /chosen,
linux,low-memory-range=
Crash dump kernel reads this property at boot time and call
memblock_add() after memblock_cap_memory_range() has been called.
Signed-off-by: Chen Zhou
---
arch/arm64/mm/init.c | 30 +-
1 file changed, 29 insert
]: https://lkml.org/lkml/2019/4/9/306
[v4]: https://lkml.org/lkml/2019/4/15/273
[v5]: https://lkml.org/lkml/2019/5/6/1360
Chen Zhou (4):
x86: kdump: move reserve_crashkernel_low() into crash_core.c
arm64: kdump: reserve crashkenel above 4G for crash dump kernel
arm64: kdump: add memory for
Now we support crashkernel=X,[low] on arm64, update the Documentation.
Signed-off-by: Chen Zhou
---
Documentation/admin-guide/kdump/kdump.rst | 13 +++--
Documentation/admin-guide/kernel-parameters.txt | 12 +++-
2 files changed, 22 insertions(+), 3 deletions(-)
diff
Hi all,
Friendly ping...
On 2019/8/30 15:11, Chen Zhou wrote:
> I am busy with other things, so it was a long time before this version was
> released.
>
> This patch series enable reserving crashkernel above 4G in arm64.
>
> There are following issues in arm64 kdump:
> 1.
Hi Will
On 2019/12/18 17:09, Will Deacon wrote:
> On Wed, Dec 18, 2019 at 10:07:59AM +0800, Chen Zhou wrote:
>> Friendly ping...
>
> You broke the build:
>
> https://lore.kernel.org/lkml/201909010744.cde940pv%...@intel.com
> https://lore.kernel.org/lkml/20190901070
Hi John,
On 2019/12/19 1:18, John Donnelly wrote:
> HI
>
> SEE INLINE ON A QUESTION :
>
>> On Dec 17, 2019, at 8:07 PM, Chen Zhou wrote:
>>
>> Hi all,
>>
>> Friendly ping...
>>
>> On 2019/8/30 15:11, Chen Zhou wrote:
>>> I am bu
Hi John,
On 2019/12/20 2:33, John Donnelly wrote:
>
>
>> On Dec 18, 2019, at 8:56 PM, Chen Zhou wrote:
>>
>> Hi John,
>>
>> On 2019/12/19 1:18, John Donnelly wrote:
>>> HI
>>>
>>> SEE INLINE ON A QUESTION :
>>&
ml.org/lkml/2019/4/9/306
[v4]: https://lkml.org/lkml/2019/4/15/273
[v5]: https://lkml.org/lkml/2019/5/6/1360
[v6]: https://lkml.org/lkml/2019/8/30/142
Chen Zhou (4):
x86: kdump: move reserve_crashkernel_low() into crash_core.c
arm64: kdump: reserve crashkenel above 4G for crash dump kernel
Crashkernel=X tries to reserve memory for the crash dump kernel under
4G. If crashkernel=X,low is specified simultaneously, reserve spcified
size low memory for crash kdump kernel devices firstly and then reserve
memory above 4G.
Signed-off-by: Chen Zhou
---
arch/arm64/kernel/setup.c | 8
ed-by: kbuild test robot
Signed-off-by: Chen Zhou
---
arch/x86/kernel/setup.c| 62 -
include/linux/crash_core.h | 3 ++
include/linux/kexec.h | 2 --
kernel/crash_core.c| 87 ++
kernel/kexec_core.c
erty under /chosen,
linux,low-memory-range=
Crash dump kernel reads this property at boot time and call
memblock_add() after memblock_cap_memory_range() has been called.
Signed-off-by: Chen Zhou
---
arch/arm64/mm/init.c | 30 +-
1 file changed, 29 insert
Now we support crashkernel=X,[low] on arm64, update the Documentation.
Signed-off-by: Chen Zhou
---
Documentation/admin-guide/kdump/kdump.rst | 13 +++--
Documentation/admin-guide/kernel-parameters.txt | 12 +++-
2 files changed, 22 insertions(+), 3 deletions(-)
diff
Hi Dave
On 2019/12/27 13:54, Dave Young wrote:
> Hi,
> On 12/23/19 at 11:23pm, Chen Zhou wrote:
>> In preparation for supporting reserve_crashkernel_low in arm64 as
>> x86_64 does, move reserve_crashkernel_low() into kernel/crash_core.c.
>>
>> Note, in arm64, we res
Hi Dave,
On 2019/12/28 17:32, Dave Young wrote:
> On 12/27/19 at 07:04pm, Chen Zhou wrote:
>> Hi Dave
>>
>> On 2019/12/27 13:54, Dave Young wrote:
>>> Hi,
>>> On 12/23/19 at 11:23pm, Chen Zhou wrote:
>>>> In preparation for supporting reserve
Hi John,
On 2020/2/12 21:20, John Donnelly wrote:
> On 12/23/19 9:23 AM, Chen Zhou wrote:
>> This patch series enable reserving crashkernel above 4G in arm64.
>>
>> There are following issues in arm64 kdump:
>> 1. We use crashkernel=X to reserve crashkernel below 4G, wh
On 2020/2/24 23:25, John Donnelly wrote:
>
>
>> On Jan 16, 2020, at 9:47 AM, John Donnelly
>> wrote:
>>
>>
>>
>>> On Jan 16, 2020, at 9:17 AM, James Morse wrote:
>>>
>>> Hi guys,
>>>
>>> On 28/12/2019 09:32, Da
On 2020/3/5 18:13, Prabhakar Kushwaha wrote:
> On Mon, Dec 23, 2019 at 8:57 PM Chen Zhou wrote:
>>
>> Crashkernel=X tries to reserve memory for the crash dump kernel under
>> 4G. If crashkernel=X,low is specified simultaneously, reserve spcified
>> size low me
Hi all,
Friendly ping...
On 2019/12/23 23:23, Chen Zhou wrote:
> This patch series enable reserving crashkernel above 4G in arm64.
>
> There are following issues in arm64 kdump:
> 1. We use crashkernel=X to reserve crashkernel below 4G, which will fail
> when there is no enough
Hi Dave,
On 2019/12/31 9:39, Chen Zhou wrote:
> Hi Dave,
>
> On 2019/12/28 17:32, Dave Young wrote:
>> On 12/27/19 at 07:04pm, Chen Zhou wrote:
>>> Hi Dave
>>>
>>> On 2019/12/27 13:54, Dave Young wrote:
>>>> Hi,
>>>> On 12/23/1
Hi Dave/James,
On 2020/1/17 11:58, Dave Young wrote:
> On 01/16/20 at 03:17pm, James Morse wrote:
>> Hi guys,
>>
>> On 28/12/2019 09:32, Dave Young wrote:
>>> On 12/27/19 at 07:04pm, Chen Zhou wrote:
>>>> On 2019/12/27 13:54, Dave Young wrote:
>
Currently, there is only one crash kernel region on arm64, we add
another region "crash kernel low" used for crash dump kernel devices.
To do this, we add DT property "linux,low-memory-range" to crash
dump kernel's dtb to pass the low region.
Signed-off-by: Chen Zhou
-
ml.org/lkml/2019/4/9/306
[v4]: https://lkml.org/lkml/2019/4/15/273
[v5]: https://lkml.org/lkml/2019/5/6/1360
[v6]: https://lkml.org/lkml/2019/8/30/142
[v7]: https://lkml.org/lkml/2019/12/23/411
Chen Zhou (5):
x86: kdump: move reserve_crashkernel_low() into crash_core.c
arm64: kdump: reserve cr
emory automatically.
Reported-by: kbuild test robot
Signed-off-by: Chen Zhou
Tested-by: John Donnelly
Tested-by: Prabhakar Kushwaha
---
arch/x86/kernel/setup.c| 66 -
include/linux/crash_core.h | 3 ++
include/linux/kexec.h | 2 -
kernel/crash_c
Crashkernel=X tries to reserve memory for the crash dump kernel under
4G. If crashkernel=X,low is specified simultaneously, reserve spcified
size low memory for crash kdump kernel devices firstly and then reserve
memory above 4G.
Signed-off-by: Chen Zhou
Tested-by: John Donnelly
Tested-by
Add documentation for DT property used by arm64 kdump:
linux,low-memory-range.
"linux,low-memory-range" is an another memory region used for crash
dump kernel devices.
Signed-off-by: Chen Zhou
---
Documentation/devicetree/bindings/chosen.txt | 25
1 file c
Now we support crashkernel=X,[low] on arm64, update the Documentation.
Signed-off-by: Chen Zhou
Tested-by: John Donnelly
Tested-by: Prabhakar Kushwaha
---
Documentation/admin-guide/kdump/kdump.rst | 13 +++--
Documentation/admin-guide/kernel-parameters.txt | 12 +++-
2
erty under /chosen,
linux,low-memory-range=
Crash dump kernel reads this property at boot time and call
memblock_add() after memblock_cap_memory_range() has been called.
Signed-off-by: Chen Zhou
Tested-by: John Donnelly
Tested-by: Prabhakar Kushwaha
---
arch/arm64/mm/i
ing user-space and older kdump kernels.
Signed-off-by: Chen Zhou
---
For "support reserving crashkernel above 4G on arm64 kdump", we need
to modify the kexec-tools.
Changes since [v3]:
- Reuse DT property "linux,usable-memory-range".
Reuse DT property "linux,usable-memor
Now we support crashkernel=X,[low] on arm64, update the Documentation.
We could use parameters "crashkernel=X crashkernel=Y,low" to reserve
memory above 4G.
Signed-off-by: Chen Zhou
Tested-by: John Donnelly
Tested-by: Prabhakar Kushwaha
---
Documentation/admin-guide/kdump/kdump.rst
eters
"crashkernel=X crashkernel=Y,low".
Signed-off-by: Chen Zhou
---
kernel/crash_core.c | 7 ++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/kernel/crash_core.c b/kernel/crash_core.c
index a7580d291c37..e8ecbbc761a3 100644
--- a/kernel/crash_core.c
+++ b/kernel/crash_
.org/lkml/2019/5/6/1360
[v6]: https://lkml.org/lkml/2019/8/30/142
[v7]: https://lkml.org/lkml/2019/12/23/411
[v8]: https://lkml.org/lkml/2020/5/21/213
Chen Zhou (5):
x86: kdump: move reserve_crashkernel_low() into crash_core.c
arm64: kdump: reserve crashkenel above 4G for crash dump kernel
reserve low memory if and only if crashkernel=X,low
is specified. Different with x86_64, don't set low memory automatically.
Reported-by: kbuild test robot
Signed-off-by: Chen Zhou
Tested-by: John Donnelly
Tested-by: Prabhakar Kushwaha
---
arch/x86/kernel/setup.c
rty at boot time and call memblock_add()
to add the low memory region after memblock_cap_memory_range() has been
called.
Signed-off-by: Chen Zhou
Tested-by: John Donnelly
Tested-by: Prabhakar Kushwaha
---
arch/arm64/mm/init.c | 43 +--
1 file changed,
memtioned
above, if crashkernel=X,low is specified simultaneously, reserve spcified
size low memory for crash kdump kernel devices firstly and then reserve
memory above 4G, which is much simpler.
Signed-off-by: Chen Zhou
Tested-by: John Donnelly
Tested-by: Prabhakar Kushwaha
---
arch/arm64
eters
"crashkernel=X crashkernel=Y,low".
Signed-off-by: Chen Zhou
---
kernel/crash_core.c | 7 ++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/kernel/crash_core.c b/kernel/crash_core.c
index a7580d291c37..e8ecbbc761a3 100644
--- a/kernel/crash_core.c
+++ b/kernel/crash_
memtioned
above, if crashkernel=X,low is specified simultaneously, reserve spcified
size low memory for crash kdump kernel devices firstly and then reserve
memory above 4G, which is much simpler.
Signed-off-by: Chen Zhou
Tested-by: John Donnelly
Tested-by: Prabhakar Kushwaha
---
arch/arm64
rty at boot time and call memblock_add()
to add the low memory region after memblock_cap_memory_range() has been
called.
Signed-off-by: Chen Zhou
Tested-by: John Donnelly
Tested-by: Prabhakar Kushwaha
---
arch/arm64/mm/init.c | 43 +--
1 file changed,
ps://lkml.org/lkml/2019/4/9/86
[v3]: https://lkml.org/lkml/2019/4/9/306
[v4]: https://lkml.org/lkml/2019/4/15/273
[v5]: https://lkml.org/lkml/2019/5/6/1360
[v6]: https://lkml.org/lkml/2019/8/30/142
[v7]: https://lkml.org/lkml/2019/12/23/411
[v8]: https://lkml.org/lkml/2020/5/21/213
[v9]: https://lkml
Now we support crashkernel=X,[low] on arm64, update the Documentation.
We could use parameters "crashkernel=X crashkernel=Y,low" to reserve
memory above 4G.
Signed-off-by: Chen Zhou
Tested-by: John Donnelly
Tested-by: Prabhakar Kushwaha
---
Documentation/admin-guide/kdump/kdump.rst
reserve low memory if and only if crashkernel=X,low
is specified. Different with x86_64, don't set low memory automatically.
Reported-by: kbuild test robot
Signed-off-by: Chen Zhou
Tested-by: John Donnelly
Tested-by: Prabhakar Kushwaha
Acked-by: Dave Young
---
arch/x86/kernel/setup.c
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