* [PATCH 1/2] arm64/mm: Remove CONT_RANGE_OFFSET
@ 2020-09-08 7:19 Gavin Shan
2020-09-08 7:19 ` [PATCH 2/2] arm64/mm: Use CONT_SHIFT to define CONT_PTE_SHIFT Gavin Shan
2020-09-10 5:59 ` [PATCH 1/2] arm64/mm: Remove CONT_RANGE_OFFSET Anshuman Khandual
0 siblings, 2 replies; 7+ messages in thread
From: Gavin Shan @ 2020-09-08 7:19 UTC (permalink / raw)
To: linux-arm-kernel
Cc: catalin.marinas, will, linux-kernel, shan.gavin, anshuman.khandual
The macro was introduced by commit <ecf35a237a85> ("arm64: PTE/PMD
contiguous bit definition") at the beginning. It's only used by
commit <348a65cdcbbf> ("arm64: Mark kernel page ranges contiguous"),
which was reverted later by commit <667c27597ca8>. This makes the
macro unused.
This removes the unused macro (CONT_RANGE_OFFSET).
Signed-off-by: Gavin Shan <gshan@redhat.com>
---
arch/arm64/include/asm/pgtable-hwdef.h | 2 --
1 file changed, 2 deletions(-)
diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
index d400a4d9aee2..8a399e666837 100644
--- a/arch/arm64/include/asm/pgtable-hwdef.h
+++ b/arch/arm64/include/asm/pgtable-hwdef.h
@@ -98,8 +98,6 @@
#define CONT_PMDS (1 << (CONT_PMD_SHIFT - PMD_SHIFT))
#define CONT_PMD_SIZE (CONT_PMDS * PMD_SIZE)
#define CONT_PMD_MASK (~(CONT_PMD_SIZE - 1))
-/* the numerical offset of the PTE within a range of CONT_PTES */
-#define CONT_RANGE_OFFSET(addr) (((addr)>>PAGE_SHIFT)&(CONT_PTES-1))
/*
* Hardware page table definitions.
--
2.23.0
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH 2/2] arm64/mm: Use CONT_SHIFT to define CONT_PTE_SHIFT
2020-09-08 7:19 [PATCH 1/2] arm64/mm: Remove CONT_RANGE_OFFSET Gavin Shan
@ 2020-09-08 7:19 ` Gavin Shan
2020-09-10 6:17 ` Anshuman Khandual
2020-09-10 5:59 ` [PATCH 1/2] arm64/mm: Remove CONT_RANGE_OFFSET Anshuman Khandual
1 sibling, 1 reply; 7+ messages in thread
From: Gavin Shan @ 2020-09-08 7:19 UTC (permalink / raw)
To: linux-arm-kernel
Cc: catalin.marinas, will, linux-kernel, shan.gavin, anshuman.khandual
The macro CONT_PTE_SHIFT actually depends on CONT_SHIFT, which has
been defined in page-def.h, based on CONFIG_ARM64_CONT_SHIFT. Lets
reflect the dependency.
Signed-off-by: Gavin Shan <gshan@redhat.com>
---
arch/arm64/include/asm/pgtable-hwdef.h | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
index 8a399e666837..0bd9469f4323 100644
--- a/arch/arm64/include/asm/pgtable-hwdef.h
+++ b/arch/arm64/include/asm/pgtable-hwdef.h
@@ -81,14 +81,12 @@
/*
* Contiguous page definitions.
*/
+#define CONT_PTE_SHIFT (CONT_SHIFT + PAGE_SHIFT)
#ifdef CONFIG_ARM64_64K_PAGES
-#define CONT_PTE_SHIFT (5 + PAGE_SHIFT)
#define CONT_PMD_SHIFT (5 + PMD_SHIFT)
#elif defined(CONFIG_ARM64_16K_PAGES)
-#define CONT_PTE_SHIFT (7 + PAGE_SHIFT)
#define CONT_PMD_SHIFT (5 + PMD_SHIFT)
#else
-#define CONT_PTE_SHIFT (4 + PAGE_SHIFT)
#define CONT_PMD_SHIFT (4 + PMD_SHIFT)
#endif
--
2.23.0
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH 1/2] arm64/mm: Remove CONT_RANGE_OFFSET
2020-09-08 7:19 [PATCH 1/2] arm64/mm: Remove CONT_RANGE_OFFSET Gavin Shan
2020-09-08 7:19 ` [PATCH 2/2] arm64/mm: Use CONT_SHIFT to define CONT_PTE_SHIFT Gavin Shan
@ 2020-09-10 5:59 ` Anshuman Khandual
1 sibling, 0 replies; 7+ messages in thread
From: Anshuman Khandual @ 2020-09-10 5:59 UTC (permalink / raw)
To: Gavin Shan, linux-arm-kernel
Cc: catalin.marinas, will, linux-kernel, shan.gavin
On 09/08/2020 12:49 PM, Gavin Shan wrote:
> The macro was introduced by commit <ecf35a237a85> ("arm64: PTE/PMD
> contiguous bit definition") at the beginning. It's only used by
> commit <348a65cdcbbf> ("arm64: Mark kernel page ranges contiguous"),
> which was reverted later by commit <667c27597ca8>. This makes the
> macro unused.
>
> This removes the unused macro (CONT_RANGE_OFFSET).
>
> Signed-off-by: Gavin Shan <gshan@redhat.com>
> ---
> arch/arm64/include/asm/pgtable-hwdef.h | 2 --
> 1 file changed, 2 deletions(-)
>
> diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
> index d400a4d9aee2..8a399e666837 100644
> --- a/arch/arm64/include/asm/pgtable-hwdef.h
> +++ b/arch/arm64/include/asm/pgtable-hwdef.h
> @@ -98,8 +98,6 @@
> #define CONT_PMDS (1 << (CONT_PMD_SHIFT - PMD_SHIFT))
> #define CONT_PMD_SIZE (CONT_PMDS * PMD_SIZE)
> #define CONT_PMD_MASK (~(CONT_PMD_SIZE - 1))
> -/* the numerical offset of the PTE within a range of CONT_PTES */
> -#define CONT_RANGE_OFFSET(addr) (((addr)>>PAGE_SHIFT)&(CONT_PTES-1))
>
> /*
> * Hardware page table definitions.
>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 2/2] arm64/mm: Use CONT_SHIFT to define CONT_PTE_SHIFT
2020-09-08 7:19 ` [PATCH 2/2] arm64/mm: Use CONT_SHIFT to define CONT_PTE_SHIFT Gavin Shan
@ 2020-09-10 6:17 ` Anshuman Khandual
2020-09-10 8:31 ` Gavin Shan
0 siblings, 1 reply; 7+ messages in thread
From: Anshuman Khandual @ 2020-09-10 6:17 UTC (permalink / raw)
To: Gavin Shan, linux-arm-kernel
Cc: catalin.marinas, will, linux-kernel, shan.gavin
On 09/08/2020 12:49 PM, Gavin Shan wrote:
> The macro CONT_PTE_SHIFT actually depends on CONT_SHIFT, which has
> been defined in page-def.h, based on CONFIG_ARM64_CONT_SHIFT. Lets
> reflect the dependency.
>
> Signed-off-by: Gavin Shan <gshan@redhat.com>
> ---
> arch/arm64/include/asm/pgtable-hwdef.h | 4 +---
> 1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
> index 8a399e666837..0bd9469f4323 100644
> --- a/arch/arm64/include/asm/pgtable-hwdef.h
> +++ b/arch/arm64/include/asm/pgtable-hwdef.h
> @@ -81,14 +81,12 @@
> /*
> * Contiguous page definitions.
> */
> +#define CONT_PTE_SHIFT (CONT_SHIFT + PAGE_SHIFT)
> #ifdef CONFIG_ARM64_64K_PAGES
> -#define CONT_PTE_SHIFT (5 + PAGE_SHIFT)
> #define CONT_PMD_SHIFT (5 + PMD_SHIFT)
> #elif defined(CONFIG_ARM64_16K_PAGES)
> -#define CONT_PTE_SHIFT (7 + PAGE_SHIFT)
> #define CONT_PMD_SHIFT (5 + PMD_SHIFT)
> #else
> -#define CONT_PTE_SHIFT (4 + PAGE_SHIFT)
> #define CONT_PMD_SHIFT (4 + PMD_SHIFT)
> #endif
Could not a similar CONT_PMD be created from a new CONFIG_ARM64_CONT_PMD
config option, which would help unify CONT_PMD_SHIFT here as well ?
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 2/2] arm64/mm: Use CONT_SHIFT to define CONT_PTE_SHIFT
2020-09-10 6:17 ` Anshuman Khandual
@ 2020-09-10 8:31 ` Gavin Shan
2020-09-10 9:28 ` Anshuman Khandual
0 siblings, 1 reply; 7+ messages in thread
From: Gavin Shan @ 2020-09-10 8:31 UTC (permalink / raw)
To: Anshuman Khandual, linux-arm-kernel
Cc: catalin.marinas, will, linux-kernel, shan.gavin
Hi Anshuman,
On 9/10/20 4:17 PM, Anshuman Khandual wrote:
> On 09/08/2020 12:49 PM, Gavin Shan wrote:
>> The macro CONT_PTE_SHIFT actually depends on CONT_SHIFT, which has
>> been defined in page-def.h, based on CONFIG_ARM64_CONT_SHIFT. Lets
>> reflect the dependency.
>>
>> Signed-off-by: Gavin Shan <gshan@redhat.com>
>> ---
>> arch/arm64/include/asm/pgtable-hwdef.h | 4 +---
>> 1 file changed, 1 insertion(+), 3 deletions(-)
>>
>> diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
>> index 8a399e666837..0bd9469f4323 100644
>> --- a/arch/arm64/include/asm/pgtable-hwdef.h
>> +++ b/arch/arm64/include/asm/pgtable-hwdef.h
>> @@ -81,14 +81,12 @@
>> /*
>> * Contiguous page definitions.
>> */
>> +#define CONT_PTE_SHIFT (CONT_SHIFT + PAGE_SHIFT)
>> #ifdef CONFIG_ARM64_64K_PAGES
>> -#define CONT_PTE_SHIFT (5 + PAGE_SHIFT)
>> #define CONT_PMD_SHIFT (5 + PMD_SHIFT)
>> #elif defined(CONFIG_ARM64_16K_PAGES)
>> -#define CONT_PTE_SHIFT (7 + PAGE_SHIFT)
>> #define CONT_PMD_SHIFT (5 + PMD_SHIFT)
>> #else
>> -#define CONT_PTE_SHIFT (4 + PAGE_SHIFT)
>> #define CONT_PMD_SHIFT (4 + PMD_SHIFT)
>> #endif
> Could not a similar CONT_PMD be created from a new CONFIG_ARM64_CONT_PMD
> config option, which would help unify CONT_PMD_SHIFT here as well ?
>
I was thinking of it, to have CONFIG_ARM64_CONT_PMD and defined the
following macros in arch/arm64/include/asm/page-def.h:
#define CONT_PMD_SHIFT CONFIG_ARM64_CONT_PMD_SHIFT
#define CONT_PMD_SIZE (_AC(1, UL) << (CONT_PMD_SHIFT + PMD_SHIFT)
#define CONT_PMD_MASK (~(CONT_PMD_SIZE - 1))
PMD_SHIFT is variable because PMD could be folded into PUD or PGD,
depending on the kernel configuration. PMD_SHIFT is declared
in arch/arm64/include/asm/pgtable-types.h, which isn't supposed
to be included in "page-def.h".
So the peroper way to handle this might be drop the continuous page
macros in page-def.h and introduce the following ones into pgtable-hwdef.h.
I will post v2 to do this if it sounds good to you.
#define CONT_PTE_SHIFT (CONFIG_ARM64_CONT_PTE_SHIFT + PAGE_SHIFT)
#define CONT_PMD_SHIFT (CONFIG_ARM64_CONT_PMD_SHIFT + PMD_SHIFT)
Thanks,
Gavin
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 2/2] arm64/mm: Use CONT_SHIFT to define CONT_PTE_SHIFT
2020-09-10 8:31 ` Gavin Shan
@ 2020-09-10 9:28 ` Anshuman Khandual
2020-09-10 9:56 ` Gavin Shan
0 siblings, 1 reply; 7+ messages in thread
From: Anshuman Khandual @ 2020-09-10 9:28 UTC (permalink / raw)
To: Gavin Shan, linux-arm-kernel
Cc: catalin.marinas, will, linux-kernel, shan.gavin
On 09/10/2020 02:01 PM, Gavin Shan wrote:
> Hi Anshuman,
>
> On 9/10/20 4:17 PM, Anshuman Khandual wrote:
>> On 09/08/2020 12:49 PM, Gavin Shan wrote:
>>> The macro CONT_PTE_SHIFT actually depends on CONT_SHIFT, which has
>>> been defined in page-def.h, based on CONFIG_ARM64_CONT_SHIFT. Lets
>>> reflect the dependency.
>>>
>>> Signed-off-by: Gavin Shan <gshan@redhat.com>
>>> ---
>>> arch/arm64/include/asm/pgtable-hwdef.h | 4 +---
>>> 1 file changed, 1 insertion(+), 3 deletions(-)
>>>
>>> diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
>>> index 8a399e666837..0bd9469f4323 100644
>>> --- a/arch/arm64/include/asm/pgtable-hwdef.h
>>> +++ b/arch/arm64/include/asm/pgtable-hwdef.h
>>> @@ -81,14 +81,12 @@
>>> /*
>>> * Contiguous page definitions.
>>> */
>>> +#define CONT_PTE_SHIFT (CONT_SHIFT + PAGE_SHIFT)
>>> #ifdef CONFIG_ARM64_64K_PAGES
>>> -#define CONT_PTE_SHIFT (5 + PAGE_SHIFT)
>>> #define CONT_PMD_SHIFT (5 + PMD_SHIFT)
>>> #elif defined(CONFIG_ARM64_16K_PAGES)
>>> -#define CONT_PTE_SHIFT (7 + PAGE_SHIFT)
>>> #define CONT_PMD_SHIFT (5 + PMD_SHIFT)
>>> #else
>>> -#define CONT_PTE_SHIFT (4 + PAGE_SHIFT)
>>> #define CONT_PMD_SHIFT (4 + PMD_SHIFT)
>>> #endif
>> Could not a similar CONT_PMD be created from a new CONFIG_ARM64_CONT_PMD
>> config option, which would help unify CONT_PMD_SHIFT here as well ?
>>
>
> I was thinking of it, to have CONFIG_ARM64_CONT_PMD and defined the
> following macros in arch/arm64/include/asm/page-def.h:
>
> #define CONT_PMD_SHIFT CONFIG_ARM64_CONT_PMD_SHIFT
> #define CONT_PMD_SIZE (_AC(1, UL) << (CONT_PMD_SHIFT + PMD_SHIFT)
> #define CONT_PMD_MASK (~(CONT_PMD_SIZE - 1))
>
> PMD_SHIFT is variable because PMD could be folded into PUD or PGD,
> depending on the kernel configuration. PMD_SHIFT is declared
Even CONT_PMD_SHIFT via the new CONFIG_ARM64_CONT_PMD_SHIFT will
be a variable as well depending on page size.
> in arch/arm64/include/asm/pgtable-types.h, which isn't supposed
> to be included in "page-def.h".
Are there build failures if <pgtable-types.h> is included from <page-def.h> ?
>
> So the peroper way to handle this might be drop the continuous page
> macros in page-def.h and introduce the following ones into pgtable-hwdef.h.
> I will post v2 to do this if it sounds good to you.
Sure, go ahead if that builds. But unifying both these macros seems cleaner.
>
> #define CONT_PTE_SHIFT (CONFIG_ARM64_CONT_PTE_SHIFT + PAGE_SHIFT)
> #define CONT_PMD_SHIFT (CONFIG_ARM64_CONT_PMD_SHIFT + PMD_SHIFT)
>
> Thanks,
> Gavin
>
>
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 2/2] arm64/mm: Use CONT_SHIFT to define CONT_PTE_SHIFT
2020-09-10 9:28 ` Anshuman Khandual
@ 2020-09-10 9:56 ` Gavin Shan
0 siblings, 0 replies; 7+ messages in thread
From: Gavin Shan @ 2020-09-10 9:56 UTC (permalink / raw)
To: Anshuman Khandual, linux-arm-kernel
Cc: catalin.marinas, will, linux-kernel, shan.gavin
Hi Anshuman,
On 9/10/20 7:28 PM, Anshuman Khandual wrote:
> On 09/10/2020 02:01 PM, Gavin Shan wrote:
>> On 9/10/20 4:17 PM, Anshuman Khandual wrote:
>>> On 09/08/2020 12:49 PM, Gavin Shan wrote:
>>>> The macro CONT_PTE_SHIFT actually depends on CONT_SHIFT, which has
>>>> been defined in page-def.h, based on CONFIG_ARM64_CONT_SHIFT. Lets
>>>> reflect the dependency.
>>>>
>>>> Signed-off-by: Gavin Shan <gshan@redhat.com>
>>>> ---
>>>> arch/arm64/include/asm/pgtable-hwdef.h | 4 +---
>>>> 1 file changed, 1 insertion(+), 3 deletions(-)
>>>>
>>>> diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
>>>> index 8a399e666837..0bd9469f4323 100644
>>>> --- a/arch/arm64/include/asm/pgtable-hwdef.h
>>>> +++ b/arch/arm64/include/asm/pgtable-hwdef.h
>>>> @@ -81,14 +81,12 @@
>>>> /*
>>>> * Contiguous page definitions.
>>>> */
>>>> +#define CONT_PTE_SHIFT (CONT_SHIFT + PAGE_SHIFT)
>>>> #ifdef CONFIG_ARM64_64K_PAGES
>>>> -#define CONT_PTE_SHIFT (5 + PAGE_SHIFT)
>>>> #define CONT_PMD_SHIFT (5 + PMD_SHIFT)
>>>> #elif defined(CONFIG_ARM64_16K_PAGES)
>>>> -#define CONT_PTE_SHIFT (7 + PAGE_SHIFT)
>>>> #define CONT_PMD_SHIFT (5 + PMD_SHIFT)
>>>> #else
>>>> -#define CONT_PTE_SHIFT (4 + PAGE_SHIFT)
>>>> #define CONT_PMD_SHIFT (4 + PMD_SHIFT)
>>>> #endif
>>> Could not a similar CONT_PMD be created from a new CONFIG_ARM64_CONT_PMD
>>> config option, which would help unify CONT_PMD_SHIFT here as well ?
>>>
>>
>> I was thinking of it, to have CONFIG_ARM64_CONT_PMD and defined the
>> following macros in arch/arm64/include/asm/page-def.h:
>>
>> #define CONT_PMD_SHIFT CONFIG_ARM64_CONT_PMD_SHIFT
>> #define CONT_PMD_SIZE (_AC(1, UL) << (CONT_PMD_SHIFT + PMD_SHIFT)
>> #define CONT_PMD_MASK (~(CONT_PMD_SIZE - 1))
>>
>> PMD_SHIFT is variable because PMD could be folded into PUD or PGD,
>> depending on the kernel configuration. PMD_SHIFT is declared
>
> Even CONT_PMD_SHIFT via the new CONFIG_ARM64_CONT_PMD_SHIFT will
> be a variable as well depending on page size.
>
Yes, it depends on the variable PMD_SHIFT.
>> in arch/arm64/include/asm/pgtable-types.h, which isn't supposed
>> to be included in "page-def.h".
>
> Are there build failures if <pgtable-types.h> is included from <page-def.h> ?
>
Yes, something like this:
AS arch/arm64/kernel/head.o
In file included from ./arch/arm64/include/asm/pgtable-hwdef.h:8,
from ./arch/arm64/include/asm/page-def.h:12,
from ./arch/arm64/include/asm/page.h:11,
from ./arch/arm64/include/asm/proc-fns.h:14,
from ./arch/arm64/include/asm/pgtable.h:9,
from ./include/linux/pgtable.h:6,
from ./arch/arm64/include/asm/io.h:12,
from ./include/linux/io.h:13,
from drivers/bus/vexpress-config.c:9:
./arch/arm64/include/asm/memory.h:91:55: warning: "PAGE_SHIFT" is not defined, evaluates to 0 [-Wundef]
#if defined(CONFIG_VMAP_STACK) && (MIN_THREAD_SHIFT < PAGE_SHIFT)
^~~~~~~~~~
./arch/arm64/include/asm/memory.h:97:21: warning: "PAGE_SHIFT" is not defined, evaluates to 0 [-Wundef]
#if THREAD_SHIFT >= PAGE_SHIFT
^~~~~~~~~~
>>
>> So the peroper way to handle this might be drop the continuous page
>> macros in page-def.h and introduce the following ones into pgtable-hwdef.h.
>> I will post v2 to do this if it sounds good to you.
>
> Sure, go ahead if that builds. But unifying both these macros seems cleaner.
>
Thanks for your confirmation. v2 is on the way :)
>>
>> #define CONT_PTE_SHIFT (CONFIG_ARM64_CONT_PTE_SHIFT + PAGE_SHIFT)
>> #define CONT_PMD_SHIFT (CONFIG_ARM64_CONT_PMD_SHIFT + PMD_SHIFT)
>>
Thanks,
Gavin
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2020-09-10 9:58 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-09-08 7:19 [PATCH 1/2] arm64/mm: Remove CONT_RANGE_OFFSET Gavin Shan
2020-09-08 7:19 ` [PATCH 2/2] arm64/mm: Use CONT_SHIFT to define CONT_PTE_SHIFT Gavin Shan
2020-09-10 6:17 ` Anshuman Khandual
2020-09-10 8:31 ` Gavin Shan
2020-09-10 9:28 ` Anshuman Khandual
2020-09-10 9:56 ` Gavin Shan
2020-09-10 5:59 ` [PATCH 1/2] arm64/mm: Remove CONT_RANGE_OFFSET Anshuman Khandual
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).