From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Mike Rapoport <rppt@kernel.org>
Cc: Linux-sh list <linux-sh@vger.kernel.org>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Rich Felker <dalias@libc.org>, Linux MM <linux-mm@kvack.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Mike Rapoport <rppt@linux.ibm.com>
Subject: Re: [PATCH 2/2] sh: add support for folded p4d page tables
Date: Tue, 17 Dec 2019 17:59:43 +0000 [thread overview]
Message-ID: <CAMuHMdXYp7EBK446EsDt_HLDvc96TPP9oPZmsLtFL5VvhSejjw@mail.gmail.com> (raw)
In-Reply-To: <20191217142150.10392-3-rppt@kernel.org>
Hi Mike,
On Tue, Dec 17, 2019 at 3:23 PM Mike Rapoport <rppt@kernel.org> wrote:
> From: Mike Rapoport <rppt@linux.ibm.com>
>
> Implement primitives necessary for the 4th level folding, add walks of p4d
> level where appropriate and remove usage of __ARCH_USE_5LEVEL_HACK.
>
> Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Thanks for your patch!
> --- a/arch/sh/mm/fault.c
> +++ b/arch/sh/mm/fault.c
> @@ -65,7 +66,20 @@ static void show_pte(struct mm_struct *mm, unsigned long addr)
> break;
> }
>
> - pud = pud_offset(pgd, addr);
> + p4d = p4d_offset(pgd, addr);
> + if (PTRS_PER_P4D != 1)
> + printk(", *p4d=%0*Lx", (u32)(sizeof(*p4d) * 2),
> + (u64)p4d_val(*p4d));
This (and the prints below) is gonna cause lots of broken output lines.
You should use pr_cont() instead, and probably rebase on top of my
"[PATCH 7/7] sh: fault: Modernize printing of kernel messages"
(https://lore.kernel.org/lkml/20191203162645.19950-8-geert+renesas@glider.be/).
> +
> + if (p4d_none(*p4d))
> + break;
> +
> + if (p4d_bad(*p4d)) {
> + printk("(bad)");
> + break;
> + }
> +
> + pud = pud_offset(p4d, addr);
> if (PTRS_PER_PUD != 1)
> printk(", *pud=%0*Lx", (u32)(sizeof(*pud) * 2),
> (u64)pud_val(*pud));
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
WARNING: multiple messages have this Message-ID (diff)
From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Mike Rapoport <rppt@kernel.org>
Cc: Linux-sh list <linux-sh@vger.kernel.org>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Rich Felker <dalias@libc.org>, Linux MM <linux-mm@kvack.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Mike Rapoport <rppt@linux.ibm.com>
Subject: Re: [PATCH 2/2] sh: add support for folded p4d page tables
Date: Tue, 17 Dec 2019 18:59:43 +0100 [thread overview]
Message-ID: <CAMuHMdXYp7EBK446EsDt_HLDvc96TPP9oPZmsLtFL5VvhSejjw@mail.gmail.com> (raw)
In-Reply-To: <20191217142150.10392-3-rppt@kernel.org>
Hi Mike,
On Tue, Dec 17, 2019 at 3:23 PM Mike Rapoport <rppt@kernel.org> wrote:
> From: Mike Rapoport <rppt@linux.ibm.com>
>
> Implement primitives necessary for the 4th level folding, add walks of p4d
> level where appropriate and remove usage of __ARCH_USE_5LEVEL_HACK.
>
> Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Thanks for your patch!
> --- a/arch/sh/mm/fault.c
> +++ b/arch/sh/mm/fault.c
> @@ -65,7 +66,20 @@ static void show_pte(struct mm_struct *mm, unsigned long addr)
> break;
> }
>
> - pud = pud_offset(pgd, addr);
> + p4d = p4d_offset(pgd, addr);
> + if (PTRS_PER_P4D != 1)
> + printk(", *p4d=%0*Lx", (u32)(sizeof(*p4d) * 2),
> + (u64)p4d_val(*p4d));
This (and the prints below) is gonna cause lots of broken output lines.
You should use pr_cont() instead, and probably rebase on top of my
"[PATCH 7/7] sh: fault: Modernize printing of kernel messages"
(https://lore.kernel.org/lkml/20191203162645.19950-8-geert+renesas@glider.be/).
> +
> + if (p4d_none(*p4d))
> + break;
> +
> + if (p4d_bad(*p4d)) {
> + printk("(bad)");
> + break;
> + }
> +
> + pud = pud_offset(p4d, addr);
> if (PTRS_PER_PUD != 1)
> printk(", *pud=%0*Lx", (u32)(sizeof(*pud) * 2),
> (u64)pud_val(*pud));
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
WARNING: multiple messages have this Message-ID (diff)
From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Mike Rapoport <rppt@kernel.org>
Cc: Linux-sh list <linux-sh@vger.kernel.org>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Rich Felker <dalias@libc.org>, Linux MM <linux-mm@kvack.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Mike Rapoport <rppt@linux.ibm.com>
Subject: Re: [PATCH 2/2] sh: add support for folded p4d page tables
Date: Tue, 17 Dec 2019 18:59:43 +0100 [thread overview]
Message-ID: <CAMuHMdXYp7EBK446EsDt_HLDvc96TPP9oPZmsLtFL5VvhSejjw@mail.gmail.com> (raw)
In-Reply-To: <20191217142150.10392-3-rppt@kernel.org>
Hi Mike,
On Tue, Dec 17, 2019 at 3:23 PM Mike Rapoport <rppt@kernel.org> wrote:
> From: Mike Rapoport <rppt@linux.ibm.com>
>
> Implement primitives necessary for the 4th level folding, add walks of p4d
> level where appropriate and remove usage of __ARCH_USE_5LEVEL_HACK.
>
> Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Thanks for your patch!
> --- a/arch/sh/mm/fault.c
> +++ b/arch/sh/mm/fault.c
> @@ -65,7 +66,20 @@ static void show_pte(struct mm_struct *mm, unsigned long addr)
> break;
> }
>
> - pud = pud_offset(pgd, addr);
> + p4d = p4d_offset(pgd, addr);
> + if (PTRS_PER_P4D != 1)
> + printk(", *p4d=%0*Lx", (u32)(sizeof(*p4d) * 2),
> + (u64)p4d_val(*p4d));
This (and the prints below) is gonna cause lots of broken output lines.
You should use pr_cont() instead, and probably rebase on top of my
"[PATCH 7/7] sh: fault: Modernize printing of kernel messages"
(https://lore.kernel.org/lkml/20191203162645.19950-8-geert+renesas@glider.be/).
> +
> + if (p4d_none(*p4d))
> + break;
> +
> + if (p4d_bad(*p4d)) {
> + printk("(bad)");
> + break;
> + }
> +
> + pud = pud_offset(p4d, addr);
> if (PTRS_PER_PUD != 1)
> printk(", *pud=%0*Lx", (u32)(sizeof(*pud) * 2),
> (u64)pud_val(*pud));
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
next prev parent reply other threads:[~2019-12-17 17:59 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-17 14:21 [PATCH 0/2] sh: get rid of __ARCH_USE_5LEVEL_HACK Mike Rapoport
2019-12-17 14:21 ` Mike Rapoport
2019-12-17 14:21 ` [PATCH 1/2] sh: drop __pXd_offset() macros that duplicate pXd_index() ones Mike Rapoport
2019-12-17 14:21 ` Mike Rapoport
2019-12-17 14:21 ` [PATCH 2/2] sh: add support for folded p4d page tables Mike Rapoport
2019-12-17 14:21 ` Mike Rapoport
2019-12-17 17:59 ` Geert Uytterhoeven [this message]
2019-12-17 17:59 ` Geert Uytterhoeven
2019-12-17 17:59 ` Geert Uytterhoeven
2019-12-17 18:32 ` Mike Rapoport
2019-12-17 18:32 ` Mike Rapoport
2019-12-17 15:15 ` [PATCH 0/2] sh: get rid of __ARCH_USE_5LEVEL_HACK Rich Felker
2019-12-17 15:15 ` Rich Felker
2019-12-17 15:36 ` Mike Rapoport
2019-12-17 15:36 ` Mike Rapoport
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