On 02/12/2020 11:25 PM, Gerald Schaefer wrote:
> On Wed, 12 Feb 2020 15:12:54 +0530
> Anshuman Khandual wrote:
>
+/*
+ * On s390 platform, the lower 12 bits are used to identify given page
table
+ * entry type and for other arch specific requirements. But these bits
On Wed, 12 Feb 2020 15:12:54 +0530
Anshuman Khandual wrote:
> >> +/*
> >> + * On s390 platform, the lower 12 bits are used to identify given page
> >> table
> >> + * entry type and for other arch specific requirements. But these bits
> >> might
> >> + * affect the ability to clear entries with
On 02/10/2020 09:07 PM, Catalin Marinas wrote:
> On Tue, Jan 28, 2020 at 06:57:53AM +0530, Anshuman Khandual wrote:
>> This gets build and run when CONFIG_DEBUG_VM_PGTABLE is selected along with
>> CONFIG_VM_DEBUG. Architectures willing to subscribe this test also need to
>> select CONFIG_ARCH_HAS_
On Tue, Jan 28, 2020 at 06:57:53AM +0530, Anshuman Khandual wrote:
> This gets build and run when CONFIG_DEBUG_VM_PGTABLE is selected along with
> CONFIG_VM_DEBUG. Architectures willing to subscribe this test also need to
> select CONFIG_ARCH_HAS_DEBUG_VM_PGTABLE which for now is limited to x86 and
On Mon, 2020-02-03 at 16:14 +0100, Christophe Leroy wrote:
>
> Le 02/02/2020 à 12:26, Qian Cai a écrit :
> >
> >
> > > On Jan 30, 2020, at 9:13 AM, Christophe Leroy
> > > wrote:
> > >
> > > config DEBUG_VM_PGTABLE
> > > bool "Debug arch page table for semantics compliance" if
> > > ARCH_
Le 02/02/2020 à 12:26, Qian Cai a écrit :
On Jan 30, 2020, at 9:13 AM, Christophe Leroy wrote:
config DEBUG_VM_PGTABLE
bool "Debug arch page table for semantics compliance" if
ARCH_HAS_DEBUG_VM_PGTABLE || EXPERT
depends on MMU
default 'n' if !ARCH_HAS_DEBUG_VM_PGTABLE
defa
> On Jan 30, 2020, at 9:13 AM, Christophe Leroy wrote:
>
> config DEBUG_VM_PGTABLE
>bool "Debug arch page table for semantics compliance" if
> ARCH_HAS_DEBUG_VM_PGTABLE || EXPERT
>depends on MMU
>default 'n' if !ARCH_HAS_DEBUG_VM_PGTABLE
>default 'y' if DEBUG_VM
Does it reall
Le 02/02/2020 à 08:18, Anshuman Khandual a écrit :
On 01/30/2020 07:43 PM, Christophe Leroy wrote:
Le 30/01/2020 à 14:04, Anshuman Khandual a écrit :
On 01/28/2020 10:35 PM, Christophe Leroy wrote:
I think we could make it standalone and 'default y if DEBUG_VM' instead.
Which will y
On 01/30/2020 06:34 PM, Anshuman Khandual wrote:
> On 01/28/2020 10:35 PM, Christophe Leroy wrote:
>>
>> Le 28/01/2020 à 02:27, Anshuman Khandual a écrit :
>>> This adds tests which will validate architecture page table helpers and
>>> other accessors in their compliance with expected generic MM
On 01/30/2020 07:43 PM, Christophe Leroy wrote:
>
>
> Le 30/01/2020 à 14:04, Anshuman Khandual a écrit :
>>
>> On 01/28/2020 10:35 PM, Christophe Leroy wrote:
>>>
>>>
>>> Le 28/01/2020 à 02:27, Anshuman Khandual a écrit :
diff --git a/arch/x86/include/asm/pgtable_64.h
b/arch/x86/includ
On 01/28/2020 06:57 AM, Anshuman Khandual wrote:
> This adds tests which will validate architecture page table helpers and
> other accessors in their compliance with expected generic MM semantics.
> This will help various architectures in validating changes to existing
> page table helpers or addit
Le 30/01/2020 à 14:04, Anshuman Khandual a écrit :
On 01/28/2020 10:35 PM, Christophe Leroy wrote:
Le 28/01/2020 à 02:27, Anshuman Khandual a écrit :
diff --git a/arch/x86/include/asm/pgtable_64.h
b/arch/x86/include/asm/pgtable_64.h
index 0b6c4042942a..fb0e76d254b3 100644
--- a/arch/x86/i
On 01/30/2020 12:57 PM, Mike Rapoport wrote:
> On Wed, Jan 29, 2020 at 11:20:44PM +0100, Gerald Schaefer wrote:
>> On Mon, 27 Jan 2020 22:33:08 -0500
>>
>> For example, who would have thought that pXd_bad() is supposed to
>> report large entries as bad? It's not really documented anywhere,
>
>
On 01/30/2020 03:50 AM, Gerald Schaefer wrote:
> On Tue, 28 Jan 2020 06:57:53 +0530
> Anshuman Khandual wrote:
>
>> This adds tests which will validate architecture page table helpers and
>> other accessors in their compliance with expected generic MM semantics.
>> This will help various archi
On 01/28/2020 10:35 PM, Christophe Leroy wrote:
>
>
> Le 28/01/2020 à 02:27, Anshuman Khandual a écrit :
>> This adds tests which will validate architecture page table helpers and
>> other accessors in their compliance with expected generic MM semantics.
>> This will help various architectures i
On Wed, Jan 29, 2020 at 11:20:44PM +0100, Gerald Schaefer wrote:
> On Mon, 27 Jan 2020 22:33:08 -0500
>
> For example, who would have thought that pXd_bad() is supposed to
> report large entries as bad? It's not really documented anywhere,
A bit off-topic,
@Anshuman, maybe you could start a Docu
On Mon, 27 Jan 2020 22:33:08 -0500
Qian Cai wrote:
> >
> >> Did those tests ever find any regression or this is almost only useful for
> >> new
> >
> > The test has already found problems with s390 page table helpers.
>
> Hmm, that is pretty weak where s390 is not even official supported with
On Tue, 28 Jan 2020 06:57:53 +0530
Anshuman Khandual wrote:
> This adds tests which will validate architecture page table helpers and
> other accessors in their compliance with expected generic MM semantics.
> This will help various architectures in validating changes to existing
> page table hel
> On Jan 29, 2020, at 5:36 AM, Catalin Marinas wrote:
>
> On Tue, Jan 28, 2020 at 02:07:10PM -0500, Qian Cai wrote:
>> On Jan 28, 2020, at 12:47 PM, Catalin Marinas
>> wrote:
>>> The primary goal here is not finding regressions but having clearly
>>> defined semantics of the page table access
On Tue, Jan 28, 2020 at 02:07:10PM -0500, Qian Cai wrote:
> On Jan 28, 2020, at 12:47 PM, Catalin Marinas wrote:
> > The primary goal here is not finding regressions but having clearly
> > defined semantics of the page table accessors across architectures. x86
> > and arm64 are a good starting poi
> On Jan 28, 2020, at 12:47 PM, Catalin Marinas wrote:
>
> The primary goal here is not finding regressions but having clearly
> defined semantics of the page table accessors across architectures. x86
> and arm64 are a good starting point and other architectures will be
> enabled as they are a
On Mon, Jan 27, 2020 at 09:11:53PM -0500, Qian Cai wrote:
> On Jan 27, 2020, at 8:28 PM, Anshuman Khandual
> wrote:
> > This adds tests which will validate architecture page table helpers and
> > other accessors in their compliance with expected generic MM semantics.
> > This will help various ar
On 1/27/20 7:33 PM, Qian Cai wrote:
>
>>> What’s the value of this block of new code? It only supports x86 and arm64
>>> which are supposed to be good now.
>> We have been over the usefulness of this code many times before as the patch
>> is
>> already in it's V12. Currently it is enabled on arm64
Le 28/01/2020 à 02:27, Anshuman Khandual a écrit :
This adds tests which will validate architecture page table helpers and
other accessors in their compliance with expected generic MM semantics.
This will help various architectures in validating changes to existing
page table helpers or additio
Hello Qian,
On Mon, Jan 27, 2020 at 10:33:08PM -0500, Qian Cai wrote:
>
> > On Jan 27, 2020, at 10:06 PM, Anshuman Khandual
> > wrote:
> >
> > enablement of this test (for the moment) but then the goal is to integrate
> > all
> > of them going forward. The test not only validates platform's ad
On Tue, Jan 28, 2020 at 02:12:56AM -0500, Qian Cai wrote:
> > On Jan 28, 2020, at 1:13 AM, Christophe Leroy
> > wrote:
> > ppc32 an indecent / legacy platform ? Are you kidying ?
> > Powerquicc II PRO for instance is fully supported by the
> > manufacturer and widely used in many small networki
> On Jan 28, 2020, at 1:13 AM, Christophe Leroy wrote:
>
> ppc32 an indecent / legacy platform ? Are you kidying ?
>
> Powerquicc II PRO for instance is fully supported by the manufacturer and
> widely used in many small networking devices.
Of course I forgot about embedded devices. The pro
> On Jan 28, 2020, at 2:03 AM, Anshuman Khandual
> wrote:
>
> 'allyesconfig' makes 'DEBUG_VM = y' which in turn will enable
> 'DEBUG_VM_PGTABLE = y'
> on platforms that subscribe ARCH_HAS_DEBUG_VM_PGTABLE.
Isn’t that only for compiling testing? Who is booting such a beast and make
sure ever
On 01/28/2020 12:06 PM, Qian Cai wrote:
>
>
>> On Jan 28, 2020, at 1:17 AM, Christophe Leroy
>> wrote:
>>
>> It is 'default y' so there is no much risk that it is forgotten, at least
>> all test suites run with 'allyes_defconfig' will trigger the test, so I
>> think it is really a good feat
> On Jan 28, 2020, at 1:17 AM, Christophe Leroy wrote:
>
> It is 'default y' so there is no much risk that it is forgotten, at least all
> test suites run with 'allyes_defconfig' will trigger the test, so I think it
> is really a good feature.
This thing depends on DEBUG_VM which I don’t see
Le 28/01/2020 à 06:48, Qian Cai a écrit :
On Jan 27, 2020, at 11:58 PM, Anshuman Khandual
wrote:
As I had mentioned before, the test attempts to formalize page table helper
semantics
as expected from generic MM code paths and intend to catch deviations when
enabled on
a given platform.
Le 28/01/2020 à 04:33, Qian Cai a écrit :
On Jan 27, 2020, at 10:06 PM, Anshuman Khandual
wrote:
On 01/28/2020 07:41 AM, Qian Cai wrote:
On Jan 27, 2020, at 8:28 PM, Anshuman Khandual
wrote:
This adds tests which will validate architecture page table helpers and
other accessors i
> On Jan 27, 2020, at 11:58 PM, Anshuman Khandual
> wrote:
>
> As I had mentioned before, the test attempts to formalize page table helper
> semantics
> as expected from generic MM code paths and intend to catch deviations when
> enabled on
> a given platform. How else should we test semanti
On 01/28/2020 09:03 AM, Qian Cai wrote:
>
>
>> On Jan 27, 2020, at 10:06 PM, Anshuman Khandual
>> wrote:
>>
>>
>>
>> On 01/28/2020 07:41 AM, Qian Cai wrote:
>>>
>>>
On Jan 27, 2020, at 8:28 PM, Anshuman Khandual
wrote:
This adds tests which will validate architecture pag
> On Jan 27, 2020, at 10:06 PM, Anshuman Khandual
> wrote:
>
>
>
> On 01/28/2020 07:41 AM, Qian Cai wrote:
>>
>>
>>> On Jan 27, 2020, at 8:28 PM, Anshuman Khandual
>>> wrote:
>>>
>>> This adds tests which will validate architecture page table helpers and
>>> other accessors in their com
On 01/28/2020 07:41 AM, Qian Cai wrote:
>
>
>> On Jan 27, 2020, at 8:28 PM, Anshuman Khandual
>> wrote:
>>
>> This adds tests which will validate architecture page table helpers and
>> other accessors in their compliance with expected generic MM semantics.
>> This will help various architectu
> On Jan 27, 2020, at 8:28 PM, Anshuman Khandual
> wrote:
>
> This adds tests which will validate architecture page table helpers and
> other accessors in their compliance with expected generic MM semantics.
> This will help various architectures in validating changes to existing
> page table
This adds tests which will validate architecture page table helpers and
other accessors in their compliance with expected generic MM semantics.
This will help various architectures in validating changes to existing
page table helpers or addition of new ones.
This test covers basic page table entry
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