From: Ding Tianhong <dingtianhong@huawei.com>
To: Russell King - ARM Linux admin <linux@armlinux.org.uk>,
Nicholas Piggin <npiggin@gmail.com>
Cc: <linux-mm@kvack.org>, Andrew Morton <akpm@linux-foundation.org>,
<linux-kernel@vger.kernel.org>, <linux-arch@vger.kernel.org>,
<linuxppc-dev@lists.ozlabs.org>,
Jonathan Cameron <Jonathan.Cameron@Huawei.com>,
Christoph Hellwig <hch@infradead.org>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Rick Edgecombe <rick.p.edgecombe@intel.com>,
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v12 01/14] ARM: mm: add missing pud_page define to 2-level page tables
Date: Tue, 2 Feb 2021 19:48:13 +0800 [thread overview]
Message-ID: <a9773c79-4fa3-dd26-27f3-bbd88600db1b@huawei.com> (raw)
In-Reply-To: <d1f661f2-f473-1dd8-94cc-fe76714249b5@huawei.com>
On 2021/2/2 19:47, Ding Tianhong wrote:
> On 2021/2/2 19:13, Russell King - ARM Linux admin wrote:
>> On Tue, Feb 02, 2021 at 09:05:02PM +1000, Nicholas Piggin wrote:
>>> diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h
>>> index c02f24400369..d63a5bb6bd0c 100644
>>> --- a/arch/arm/include/asm/pgtable.h
>>> +++ b/arch/arm/include/asm/pgtable.h
>>> @@ -166,6 +166,9 @@ extern struct page *empty_zero_page;
>>>
>>> extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
>>>
>>> +#define pud_page(pud) pmd_page(__pmd(pud_val(pud)))
>>> +#define pud_write(pud) pmd_write(__pmd(pud_val(pud)))
>>
>> As there is no PUD, does it really make sense to return a valid
>> struct page (which will be the PTE page) for pud_page(), which is
>> several tables above?
>>
> --- a/arch/arm/include/asm/pgtable-2level.h
> +++ b/arch/arm/include/asm/pgtable-2level.h
>
> +static inline int pud_none(pud_t pud)
> +{
> + return 0;
> +}
>
--- a/arch/arm/include/asm/pgtable-2level.h
+++ b/arch/arm/include/asm/pgtable-2level.h>
+static inline int pud_page(pud_t pud)
+{
+ return 0;
+}
> I think it could be fix like this.
>
> Ding
>
WARNING: multiple messages have this Message-ID (diff)
From: Ding Tianhong <dingtianhong@huawei.com>
To: Russell King - ARM Linux admin <linux@armlinux.org.uk>,
Nicholas Piggin <npiggin@gmail.com>
Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
Christoph Hellwig <hch@infradead.org>,
linux-mm@kvack.org,
Jonathan Cameron <Jonathan.Cameron@Huawei.com>,
Andrew Morton <akpm@linux-foundation.org>,
Rick Edgecombe <rick.p.edgecombe@intel.com>,
linuxppc-dev@lists.ozlabs.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v12 01/14] ARM: mm: add missing pud_page define to 2-level page tables
Date: Tue, 2 Feb 2021 19:48:13 +0800 [thread overview]
Message-ID: <a9773c79-4fa3-dd26-27f3-bbd88600db1b@huawei.com> (raw)
In-Reply-To: <d1f661f2-f473-1dd8-94cc-fe76714249b5@huawei.com>
On 2021/2/2 19:47, Ding Tianhong wrote:
> On 2021/2/2 19:13, Russell King - ARM Linux admin wrote:
>> On Tue, Feb 02, 2021 at 09:05:02PM +1000, Nicholas Piggin wrote:
>>> diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h
>>> index c02f24400369..d63a5bb6bd0c 100644
>>> --- a/arch/arm/include/asm/pgtable.h
>>> +++ b/arch/arm/include/asm/pgtable.h
>>> @@ -166,6 +166,9 @@ extern struct page *empty_zero_page;
>>>
>>> extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
>>>
>>> +#define pud_page(pud) pmd_page(__pmd(pud_val(pud)))
>>> +#define pud_write(pud) pmd_write(__pmd(pud_val(pud)))
>>
>> As there is no PUD, does it really make sense to return a valid
>> struct page (which will be the PTE page) for pud_page(), which is
>> several tables above?
>>
> --- a/arch/arm/include/asm/pgtable-2level.h
> +++ b/arch/arm/include/asm/pgtable-2level.h
>
> +static inline int pud_none(pud_t pud)
> +{
> + return 0;
> +}
>
--- a/arch/arm/include/asm/pgtable-2level.h
+++ b/arch/arm/include/asm/pgtable-2level.h>
+static inline int pud_page(pud_t pud)
+{
+ return 0;
+}
> I think it could be fix like this.
>
> Ding
>
WARNING: multiple messages have this Message-ID (diff)
From: Ding Tianhong <dingtianhong@huawei.com>
To: Russell King - ARM Linux admin <linux@armlinux.org.uk>,
Nicholas Piggin <npiggin@gmail.com>
Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Christoph Hellwig <hch@infradead.org>,
linux-mm@kvack.org,
Jonathan Cameron <Jonathan.Cameron@Huawei.com>,
Andrew Morton <akpm@linux-foundation.org>,
Rick Edgecombe <rick.p.edgecombe@intel.com>,
linuxppc-dev@lists.ozlabs.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v12 01/14] ARM: mm: add missing pud_page define to 2-level page tables
Date: Tue, 2 Feb 2021 19:48:13 +0800 [thread overview]
Message-ID: <a9773c79-4fa3-dd26-27f3-bbd88600db1b@huawei.com> (raw)
In-Reply-To: <d1f661f2-f473-1dd8-94cc-fe76714249b5@huawei.com>
On 2021/2/2 19:47, Ding Tianhong wrote:
> On 2021/2/2 19:13, Russell King - ARM Linux admin wrote:
>> On Tue, Feb 02, 2021 at 09:05:02PM +1000, Nicholas Piggin wrote:
>>> diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h
>>> index c02f24400369..d63a5bb6bd0c 100644
>>> --- a/arch/arm/include/asm/pgtable.h
>>> +++ b/arch/arm/include/asm/pgtable.h
>>> @@ -166,6 +166,9 @@ extern struct page *empty_zero_page;
>>>
>>> extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
>>>
>>> +#define pud_page(pud) pmd_page(__pmd(pud_val(pud)))
>>> +#define pud_write(pud) pmd_write(__pmd(pud_val(pud)))
>>
>> As there is no PUD, does it really make sense to return a valid
>> struct page (which will be the PTE page) for pud_page(), which is
>> several tables above?
>>
> --- a/arch/arm/include/asm/pgtable-2level.h
> +++ b/arch/arm/include/asm/pgtable-2level.h
>
> +static inline int pud_none(pud_t pud)
> +{
> + return 0;
> +}
>
--- a/arch/arm/include/asm/pgtable-2level.h
+++ b/arch/arm/include/asm/pgtable-2level.h>
+static inline int pud_page(pud_t pud)
+{
+ return 0;
+}
> I think it could be fix like this.
>
> Ding
>
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next prev parent reply other threads:[~2021-02-02 11:49 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-02 11:05 [PATCH v12 00/14] huge vmalloc mappings Nicholas Piggin
2021-02-02 11:05 ` Nicholas Piggin
2021-02-02 11:05 ` [PATCH v12 01/14] ARM: mm: add missing pud_page define to 2-level page tables Nicholas Piggin
2021-02-02 11:05 ` Nicholas Piggin
2021-02-02 11:05 ` Nicholas Piggin
2021-02-02 11:13 ` Russell King - ARM Linux admin
2021-02-02 11:13 ` Russell King - ARM Linux admin
2021-02-02 11:13 ` Russell King - ARM Linux admin
2021-02-02 11:47 ` Ding Tianhong
2021-02-02 11:47 ` Ding Tianhong
2021-02-02 11:47 ` Ding Tianhong
2021-02-02 11:48 ` Ding Tianhong [this message]
2021-02-02 11:48 ` Ding Tianhong
2021-02-02 11:48 ` Ding Tianhong
2021-02-02 12:07 ` Russell King - ARM Linux admin
2021-02-02 12:07 ` Russell King - ARM Linux admin
2021-02-02 12:07 ` Russell King - ARM Linux admin
2021-02-03 3:01 ` Nicholas Piggin
2021-02-03 3:01 ` Nicholas Piggin
2021-02-03 3:01 ` Nicholas Piggin
2021-02-02 11:05 ` [PATCH v12 02/14] mm/vmalloc: fix HUGE_VMAP regression by enabling huge pages in vmalloc_to_page Nicholas Piggin
2021-02-02 11:05 ` Nicholas Piggin
2021-02-02 11:05 ` [PATCH v12 03/14] mm: apply_to_pte_range warn and fail if a large pte is encountered Nicholas Piggin
2021-02-02 11:05 ` Nicholas Piggin
2021-02-02 11:05 ` [PATCH v12 04/14] mm/vmalloc: rename vmap_*_range vmap_pages_*_range Nicholas Piggin
2021-02-02 11:05 ` Nicholas Piggin
2021-02-02 11:05 ` [PATCH v12 05/14] mm/ioremap: rename ioremap_*_range to vmap_*_range Nicholas Piggin
2021-02-02 11:05 ` Nicholas Piggin
2021-02-02 11:05 ` [PATCH v12 06/14] mm: HUGE_VMAP arch support cleanup Nicholas Piggin
2021-02-02 11:05 ` Nicholas Piggin
2021-02-02 11:05 ` Nicholas Piggin
2021-02-02 18:21 ` kernel test robot
2021-02-02 18:21 ` kernel test robot
2021-02-02 18:21 ` kernel test robot
2021-02-02 11:05 ` [PATCH v12 07/14] powerpc: inline huge vmap supported functions Nicholas Piggin
2021-02-02 11:05 ` Nicholas Piggin
2021-02-02 11:05 ` [PATCH v12 08/14] arm64: " Nicholas Piggin
2021-02-02 11:05 ` Nicholas Piggin
2021-02-02 11:05 ` Nicholas Piggin
2021-02-02 11:05 ` [PATCH v12 09/14] x86: " Nicholas Piggin
2021-02-02 11:05 ` Nicholas Piggin
2021-02-02 11:05 ` [PATCH v12 10/14] mm/vmalloc: provide fallback arch huge vmap support functions Nicholas Piggin
2021-02-02 11:05 ` Nicholas Piggin
2021-02-02 20:53 ` kernel test robot
2021-02-02 20:53 ` kernel test robot
2021-02-02 20:53 ` kernel test robot
2021-02-02 11:05 ` [PATCH v12 11/14] mm: Move vmap_range from mm/ioremap.c to mm/vmalloc.c Nicholas Piggin
2021-02-02 11:05 ` Nicholas Piggin
2021-02-02 11:05 ` [PATCH v12 12/14] mm/vmalloc: add vmap_range_noflush variant Nicholas Piggin
2021-02-02 11:05 ` Nicholas Piggin
2021-02-02 11:05 ` [PATCH v12 13/14] mm/vmalloc: Hugepage vmalloc mappings Nicholas Piggin
2021-02-02 11:05 ` Nicholas Piggin
2021-02-19 3:45 ` Ding Tianhong
2021-02-19 3:45 ` Ding Tianhong
2021-02-19 7:45 ` Nicholas Piggin
2021-02-19 7:45 ` Nicholas Piggin
2021-02-19 8:52 ` Ding Tianhong
2021-02-19 8:52 ` Ding Tianhong
2021-02-02 11:05 ` [PATCH v12 14/14] powerpc/64s/radix: Enable huge " Nicholas Piggin
2021-02-02 11:05 ` Nicholas Piggin
2021-02-02 13:48 ` kernel test robot
2021-02-02 13:48 ` kernel test robot
2021-02-02 13:48 ` kernel test robot
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