On 02.12.23 15:50, Pedro Falcato wrote:
On Fri, Dec 1, 2023 at 9:23 AM David Hildenbrand wrote:
On 28.11.23 13:50, Weixi Zhu wrote:
This patch adds an abstraction layer, struct vm_object, that maintains
per-process virtual-to-physical mapping status stored in struct gm_mapping.
For example
On 28.11.23 13:50, Weixi Zhu wrote:
This patch adds an abstraction layer, struct vm_object, that maintains
per-process virtual-to-physical mapping status stored in struct gm_mapping.
For example, a virtual page may be mapped to a CPU physical page or to a
device physical page. Struct vm_object ef
On 01.12.23 03:44, zhuweixi wrote:
Thanks!
I hope you understood that that was a joke :)
I am planning to present GMEM in Linux MM Alignment Sessions so I can collect
more input from the mm developers.
Sounds good. But please try inviting key HMM/driver developer as well.
Most of the core
On 29.11.23 09:27, zhuweixi wrote:
Glad to hear that more sharable code is desirable.
IMHO, for a common MM subsystem, it is more beneficial for
GMEM to extend core MM instead of building a separate one.
More core-mm complexity, awesome, we all love that! ;)
--
Cheers,
David / dhildenb
vma->vm_end >= vma->vm_mm->start_stack) ||
+ } else if (!vma->vm_file && (vma_is_initial_stack(vma) ||
vma_is_stack_for_current(vma))) {
rc = avc_has_perm(sid, sid, SECCLASS_PROCESS,
PROCESS__EXECSTACK, NULL);
Reviewed-by: David Hildenbrand
--
Cheers,
David / dhildenb
On 19.07.23 09:51, Kefeng Wang wrote:
Factor out VMA stack and heap checks and name them
vma_is_initial_stack() and vma_is_initial_heap() for
general use.
Cc: Christian Göttsche
Cc: David Hildenbrand
Signed-off-by: Kefeng Wang
---
[...]
diff --git a/include/linux/mm.h b/include/linux
d long)ALIGN_DOWN(addr, 2UL << 8));
Certainly a valid refactoring, although questionable if such code should
care about that.
Reviewed-by: David Hildenbrand
--
Cheers,
David / dhildenb
e = "[stack]";
- goto cpy_name;
- }
-
- name = "//anon";
- goto cpy_name;
If you're removing that goto, maybe also worth removing the goto at the
end of the previous if branch.
Reviewed-by: David Hildenbrand
--
Cheers,
David / dhildenb
On 12.07.23 16:38, Kefeng Wang wrote:
Introduce the two helpers for general use.
Signed-off-by: Kefeng Wang
---
include/linux/mm.h | 12
1 file changed, 12 insertions(+)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 1462cf15badf..0bbeb31ac750 100644
--- a/include/l
On 12.07.23 16:38, Kefeng Wang wrote:
Use the helpers to simplify code.
Signed-off-by: Kefeng Wang
---
fs/proc/task_mmu.c | 24
fs/proc/task_nommu.c | 15 +--
2 files changed, 5 insertions(+), 34 deletions(-)
Please squash patch #1 and this patch an
On 16.05.23 16:30, Sean Christopherson wrote:
On Tue, May 16, 2023, David Hildenbrand wrote:
On 15.05.23 21:07, Sean Christopherson wrote:
On Sun, May 14, 2023, Lorenzo Stoakes wrote:
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index cb5c13eee193..eaa5bb8dbadc 100644
--- a/virt/kvm
the actions
implied by the input flags.
This is part of a patch series aiming to remove the vmas parameter
altogether.
Suggested-by: Matthew Wilcox (Oracle)
Acked-by: Greg Kroah-Hartman
Acked-by: David Hildenbrand
Reviewed-by: Jason Gunthorpe
Acked-by: Christian K�nig (for radeon parts
part of a patch series aiming to remove the vmas parameter
altogether.
Signed-off-by: Lorenzo Stoakes
Suggested-by: Matthew Wilcox (Oracle)
Acked-by: Greg Kroah-Hartman
---
Acked-by: David Hildenbrand
--
Thanks,
David / dhildenb
On 21.07.22 04:05, Alistair Popple wrote:
> Commit b05a79d4377f ("mm/gup: migrate device coherent pages when pinning
> instead of failing") added a badly formatted if statement. Fix it.
>
> Signed-off-by: Alistair Popple
> Reported-by: David Hildenbrand
> ---
>
On 18.07.22 22:32, Andrew Morton wrote:
> On Mon, 18 Jul 2022 12:56:29 +0200 David Hildenbrand wrote:
>
>>> /*
>>> * Try to move out any movable page before pinning the range.
>>> */
>>> @@ -1919,7 +1948,8 @@ s
On 18.07.22 19:52, Felix Kuehling wrote:
> On 2022-07-18 06:50, David Hildenbrand wrote:
>> On 15.07.22 17:05, Alex Sierra wrote:
>>> [WHY]
>>> It makes more sense to have these helpers in zone specific header
>>> file, rather than the generic mm.h
>>>
_error_count)
> + if (!list_empty(&movable_page_list) || isolation_error_count
> + || coherent_pages)
The common style is to
a) add the || to the end of the previous line
b) indent such the we have a nice-to-read alignment
if (!list_empty(&movable_page_list) || isol
; Acked-by: Felix Kuehling (v2)
> Reviewed-by: Alistair Popple (v6)
>
Acked-by: David Hildenbrand
--
Thanks,
David / dhildenb
On 15.07.22 17:05, Alex Sierra wrote:
> [WHY]
> It makes more sense to have these helpers in zone specific header
> file, rather than the generic mm.h
>
> Signed-off-by: Alex Sierra
Acked-by: David Hildenbrand
--
Thanks,
David / dhildenb
On 08.07.22 23:25, Felix Kuehling wrote:
> On 2022-07-08 07:28, David Hildenbrand wrote:
>> On 07.07.22 21:03, Alex Sierra wrote:
>>> [WHY]
>>> Have a cleaner way to expose all page zone helpers in one header
>> What exactly is a "page zone"? Do y
On 11.07.22 16:00, Matthew Wilcox wrote:
> On Mon, Jul 11, 2022 at 03:35:42PM +0200, David Hildenbrand wrote:
>>> + /*
>>> +* Device coherent pages are managed by a driver and should not
>>> +* be pinned indefinitely as it
On 07.07.22 21:03, Alex Sierra wrote:
> From: Alistair Popple
>
> migrate_vma_setup() checks that a valid vma is passed so that the page
> tables can be walked to find the pfns associated with a given address
> range. However in some cases the pfns are already known, such as when
> migrating devi
On 07.07.22 21:03, Alex Sierra wrote:
> From: Alistair Popple
>
> Currently any attempts to pin a device coherent page will fail. This is
> because device coherent pages need to be managed by a device driver, and
> pinning them would prevent a driver from migrating them off the device.
>
> Howev
On 07.07.22 21:03, Alex Sierra wrote:
> [WHY]
> Have a cleaner way to expose all page zone helpers in one header
What exactly is a "page zone"? Do you mean a buddy zone as in
include/linux/mmzone.h ?
--
Thanks,
David / dhildenb
---
> include/linux/mm.h | 8
> mm/gup.c | 4 ++--
> mm/gup_test.c | 2 +-
> mm/hugetlb.c | 2 +-
> 4 files changed, 8 insertions(+), 8 deletions(-)
>
Reviewed-by: David Hildenbrand
--
Thanks,
David / dhildenb
On 30.06.22 13:44, Alistair Popple wrote:
>
> David Hildenbrand writes:
>
>> On 29.06.22 05:54, Alex Sierra wrote:
>>> This case is used to migrate pages from device memory, back to system
>>> memory. Device coherent type memory is cache coherent from
On 29.06.22 05:54, Alex Sierra wrote:
> This case is used to migrate pages from device memory, back to system
> memory. Device coherent type memory is cache coherent from device and CPU
> point of view.
>
> Signed-off-by: Alex Sierra
> Acked-by: Felix Kuehling
> Reviewed-by: Alistair Poppple
>
On 30.06.22 00:08, Felix Kuehling wrote:
> On 2022-06-29 03:33, David Hildenbrand wrote:
>> On 29.06.22 05:54, Alex Sierra wrote:
>>> is_pinnable_page() and folio_is_pinnable() were renamed to
>>> is_longterm_pinnable_page() and folio_is_longterm_pinnable()
>>&g
ellwig
>From what I can tell, this looks good to me
Acked-by: David Hildenbrand
--
Thanks,
David / dhildenb
continue;
>
> /* Also skip shared copy-on-write pages */
In -next/-mm there is now an additional can_change_pte_writable() that
calls vm_normal_page() -- added by me. I assume that that is indeed
fine because we can simply map device coherent pages writable.
Besides the nits, LGTM
Acked-by: David Hildenbrand
--
Thanks,
David / dhildenb
On 29.06.22 05:54, Alex Sierra wrote:
> is_pinnable_page() and folio_is_pinnable() were renamed to
> is_longterm_pinnable_page() and folio_is_longterm_pinnable()
> respectively. These functions are used in the FOLL_LONGTERM flag
> context.
Subject talks about "*_pages"
Can you elaborate why the
On 28.06.22 02:14, Alex Sierra wrote:
> With DEVICE_COHERENT, we'll soon have vm_normal_pages() return
> device-managed anonymous pages that are not LRU pages. Although they
> behave like normal pages for purposes of mapping in CPU page, and for
> COW. They do not support LRU lists, NUMA migration
On 28.06.22 02:14, Alex Sierra wrote:
> is_device_coherent checker was added to is_pinnable_page and renamed
> to is_longterm_pinnable_page. The reason is that device coherent
> pages are not supported for longterm pinning.
>
> Signed-off-by: Alex Sierra
> ---
> include/linux/memremap.h | 25 +++
On 23.06.22 20:20, Sierra Guiza, Alejandro (Alex) wrote:
>
> On 6/23/2022 2:57 AM, David Hildenbrand wrote:
>> On 23.06.22 01:16, Sierra Guiza, Alejandro (Alex) wrote:
>>> On 6/21/2022 11:16 AM, David Hildenbrand wrote:
>>>> On 21.06.22 18:08, Sierra Guiza, Alej
On 23.06.22 01:16, Sierra Guiza, Alejandro (Alex) wrote:
>
> On 6/21/2022 11:16 AM, David Hildenbrand wrote:
>> On 21.06.22 18:08, Sierra Guiza, Alejandro (Alex) wrote:
>>> On 6/21/2022 7:25 AM, David Hildenbrand wrote:
>>>> On 21.06.22 13:55, Alistair Popp
On 21.06.22 18:08, Sierra Guiza, Alejandro (Alex) wrote:
>
> On 6/21/2022 7:25 AM, David Hildenbrand wrote:
>> On 21.06.22 13:55, Alistair Popple wrote:
>>> David Hildenbrand writes:
>>>
>>>> On 21.06.22 13:25, Felix Kuehling wrote:
>>>>>
On 21.06.22 13:55, Alistair Popple wrote:
>
> David Hildenbrand writes:
>
>> On 21.06.22 13:25, Felix Kuehling wrote:
>>>
>>> Am 6/17/22 um 23:19 schrieb David Hildenbrand:
>>>> On 17.06.22 21:27, Sierra Guiza, Alejandro (Alex) wrote:
>>
On 21.06.22 13:25, Felix Kuehling wrote:
>
> Am 6/17/22 um 23:19 schrieb David Hildenbrand:
>> On 17.06.22 21:27, Sierra Guiza, Alejandro (Alex) wrote:
>>> On 6/17/2022 12:33 PM, David Hildenbrand wrote:
>>>> On 17.06.22 19:20, Sierra Guiza, Alejandro (Alex)
On 17.06.22 21:27, Sierra Guiza, Alejandro (Alex) wrote:
>
> On 6/17/2022 12:33 PM, David Hildenbrand wrote:
>> On 17.06.22 19:20, Sierra Guiza, Alejandro (Alex) wrote:
>>> On 6/17/2022 4:40 AM, David Hildenbrand wrote:
>>>> On 31.05.22 22:00, Alex Sierra wrote:
On 17.06.22 19:20, Sierra Guiza, Alejandro (Alex) wrote:
>
> On 6/17/2022 4:40 AM, David Hildenbrand wrote:
>> On 31.05.22 22:00, Alex Sierra wrote:
>>> Device memory that is cache coherent from device and CPU point of view.
>>> This is used on platforms that hav
On 31.05.22 22:00, Alex Sierra wrote:
> With DEVICE_COHERENT, we'll soon have vm_normal_pages() return
> device-managed anonymous pages that are not LRU pages. Although they
> behave like normal pages for purposes of mapping in CPU page, and for
> COW. They do not support LRU lists, NUMA migration
On 31.05.22 22:00, Alex Sierra wrote:
> Device memory that is cache coherent from device and CPU point of view.
> This is used on platforms that have an advanced system bus (like CAPI
> or CXL). Any page of a process can be migrated to such memory. However,
> no one should be allowed to pin such me
On 17.06.22 04:19, Andrew Morton wrote:
> On Tue, 31 May 2022 15:00:28 -0500 Alex Sierra wrote:
>
>> This is our MEMORY_DEVICE_COHERENT patch series rebased and updated
>> for current 5.18.0
>
> I plan to move this series into the non-rebasing mm-stable branch in a
> few days. Unless sternly to
On 31.03.22 10:53, Christoph Hellwig wrote:
>> -page = vm_normal_page(vma, addr, pte);
>> +page = vm_normal_lru_page(vma, addr, pte);
>
> Why can't this deal with ZONE_DEVICE pages? It certainly has
> nothing do with a LRU I think. In fact being able to have
> stats that count say the nu
On 17.03.22 03:54, Alistair Popple wrote:
> Felix Kuehling writes:
>
>> On 2022-03-11 04:16, David Hildenbrand wrote:
>>> On 10.03.22 18:26, Alex Sierra wrote:
>>>> DEVICE_COHERENT pages introduce a subtle distinction in the way
>>>> "normal&qu
On 10.03.22 18:26, Alex Sierra wrote:
> DEVICE_COHERENT pages introduce a subtle distinction in the way
> "normal" pages can be used by various callers throughout the kernel.
> They behave like normal pages for purposes of mapping in CPU page
> tables, and for COW. But they do not support LRU lists
>>
>>> if (PageReserved(page))
>>> diff --git a/mm/migrate.c b/mm/migrate.c
>>> index c31d04b46a5e..17d049311b78 100644
>>> --- a/mm/migrate.c
>>> +++ b/mm/migrate.c
>>> @@ -1614,7 +1614,7 @@ static int add_page_for_migration(struct mm_struct
>>> *mm, unsigned long addr,
>>>
On 01.03.22 17:30, Felix Kuehling wrote:
> Am 2022-03-01 um 11:22 schrieb David Hildenbrand:
>>>>> if (PageReserved(page))
>>>>> diff --git a/mm/migrate.c b/mm/migrate.c
>>>>> index c31d04b46a5e..17d049311b78 100644
&
On 28.02.22 21:34, Alex Sierra wrote:
> DEVICE_COHERENT pages introduce a subtle distinction in the way
> "normal" pages can be used by various callers throughout the kernel.
> They behave like normal pages for purposes of mapping in CPU page
> tables, and for COW. But they do not support LRU lists
On 16.02.22 03:36, Alistair Popple wrote:
> On Wednesday, 16 February 2022 1:03:57 PM AEDT Jason Gunthorpe wrote:
>> On Wed, Feb 16, 2022 at 12:23:44PM +1100, Alistair Popple wrote:
>>
>>> Device private and device coherent pages are not marked with pte_devmap and
>>> they
>>> are backed by a stru
On 11.02.22 18:07, Felix Kuehling wrote:
>
> Am 2022-02-11 um 11:39 schrieb David Hildenbrand:
>> On 11.02.22 17:15, David Hildenbrand wrote:
>>> On 01.02.22 16:48, Alex Sierra wrote:
>>>> Device memory that is cache coherent from device and CPU point of view.
&g
On 11.02.22 17:56, Jason Gunthorpe wrote:
> On Fri, Feb 11, 2022 at 05:49:08PM +0100, David Hildenbrand wrote:
>> On 11.02.22 17:45, Jason Gunthorpe wrote:
>>> On Fri, Feb 11, 2022 at 05:15:25PM +0100, David Hildenbrand wrote:
>>>
>>>> ... I'm pretty
On 11.02.22 00:41, Alistair Popple wrote:
> On Thursday, 10 February 2022 10:47:35 PM AEDT David Hildenbrand wrote:
>> On 10.02.22 12:39, Alistair Popple wrote:
>>> On Thursday, 10 February 2022 9:53:38 PM AEDT David Hildenbrand wrote:
>>>> On 07.02.22 05:26, Alistair
On 11.02.22 17:15, David Hildenbrand wrote:
> On 01.02.22 16:48, Alex Sierra wrote:
>> Device memory that is cache coherent from device and CPU point of view.
>> This is used on platforms that have an advanced system bus (like CAPI
>> or CXL). Any page of a process can be mi
On 11.02.22 17:45, Jason Gunthorpe wrote:
> On Fri, Feb 11, 2022 at 05:15:25PM +0100, David Hildenbrand wrote:
>
>> ... I'm pretty sure we cannot FOLL_PIN DEVICE_PRIVATE pages
>
> Currently the only way to get a DEVICE_PRIVATE page out of the page
> tables is via
On 01.02.22 16:48, Alex Sierra wrote:
> Device memory that is cache coherent from device and CPU point of view.
> This is used on platforms that have an advanced system bus (like CAPI
> or CXL). Any page of a process can be migrated to such memory. However,
> no one should be allowed to pin such me
On 07.02.22 05:26, Alistair Popple wrote:
> Currently any attempts to pin a device coherent page will fail. This is
> because device coherent pages need to be managed by a device driver, and
> pinning them would prevent a driver from migrating them off the device.
>
> However this is no reason to
On 10.02.22 12:39, Alistair Popple wrote:
> On Thursday, 10 February 2022 9:53:38 PM AEDT David Hildenbrand wrote:
>> On 07.02.22 05:26, Alistair Popple wrote:
>>> Currently any attempts to pin a device coherent page will fail. This is
>>> because device coherent pa
On 10.01.22 23:31, Alex Sierra wrote:
> This patch series introduces MEMORY_DEVICE_COHERENT, a type of memory
> owned by a device that can be mapped into CPU page tables like
> MEMORY_DEVICE_GENERIC and can also be migrated like
> MEMORY_DEVICE_PRIVATE.
>
> Christoph, the suggestion to incorporate
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:
On 16.03.21 09:58, Liang, Liang (Leo) wrote:
[AMD Public Use]
Hi David,
root@scbu-Chachani:~# cat /proc/mtrr
reg00: base=0x0 (0MB), size= 2048MB, count=1: write-back
reg01: base=0x0ffe0 ( 4094MB), size=2MB, count=1: write-protect
reg02: base=0x1 ( 4096MB), size= 16
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!
[0.34] MTRR variable ranges enabled:
[0.35] 0 base mask 8000 write-back
[0.37] 1 base FFE000
On 16.03.21 09:00, Liang, Liang (Leo) wrote:
[AMD Public Use]
Hi Mike,
Thanks for help. The patch works for me and boot time back to normal. So it's a
fix, or just WA?
Hi Leo,
excluding up to 16 MiB of memory on every system just because that
single platform is weird is not acceptable.
I
On 13.03.21 14:48, Mike Rapoport wrote:
Hi,
On Sat, Mar 13, 2021 at 10:05:23AM +0100, David Hildenbrand wrote:
Am 13.03.2021 um 05:04 schrieb Liang, Liang (Leo) :
Hi David,
Which benchmark tool you prefer? Memtest86+ or else?
Hi Leo,
I think you want something that runs under Linux
all 4MB pages in the
freelists and perform a stream benchmark individually. Then we might be able to
identify the problematic range - if there is a problematic range :) Guess I‘ll
have it running by Monday and let you know.
Cheers!
>
> BRs,
> Leo
> -----Original Message-
> From:
On 12.03.21 17:19, Liang, Liang (Leo) wrote:
[AMD Public Use]
Dmesg attached.
So, looks like the "real" slowdown starts once the buddy is up and running (no
surprise).
[0.044035] Memory: 6856724K/7200304K available (14345K kernel code, 9699K
rwdata, 5276K rodata, 2628K init, 12104K b
8G (with some carve out for the integrated GPU).
[0.044181] Memory: 6858688K/7200304K available (14345K kernel code, 9659K
rwdata, 4980K rodata, 2484K init, 12292K bss, 341360K reserved, 0K cma-reserved)
Nothing particularly special about these systems that I am aware of. I'll see
if we ca
On 12.03.21 15:06, Deucher, Alexander wrote:
[AMD Public Use]
-Original Message-
From: David Hildenbrand
Sent: Thursday, March 11, 2021 10:03 AM
To: Deucher, Alexander ; linux-
ker...@vger.kernel.org; amd-gfx list ;
Andrew Morton
Cc: Huang, Ray ; Koenig, Christian
; Liang, Liang (Leo
On 11.03.21 15:41, Deucher, Alexander wrote:
[AMD Public Use]
Booting kernels on certain AMD platforms takes 2-3 minutes with the patch in
the subject. Reverting it restores quick boot times (few seconds). Any ideas?
Hi,
We just discovered latent BUGs in ACPI code whereby ACPI tables are
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