From: Anton Ivanov <anton.ivanov@cambridgegreys.com>
To: Mike Rapoport <rppt@linux.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Palmer Dabbelt <palmer@sifive.com>,
linux-mips@vger.kernel.org, Guo Ren <guoren@kernel.org>,
linux-hexagon@vger.kernel.org, linux-riscv@lists.infradead.org,
linux-arch@vger.kernel.org, Michael Ellerman <mpe@ellerman.id.au>,
Helge Deller <deller@gmx.de>,
x86@kernel.org, Russell King <linux@armlinux.org.uk>,
Matthew Wilcox <willy@infradead.org>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Matt Turner <mattst88@gmail.com>, Sam Creasey <sammy@sammy.net>,
Arnd Bergmann <arnd@arndb.de>,
linux-um@lists.infradead.org, Richard Weinberger <richard@nod.at>,
linux-m68k@lists.linux-m68k.org,
Greentime Hu <green.hu@gmail.com>,
nios2-dev@lists.rocketboards.org, Guan Xuetao <gxt@pku.edu.cn>,
linux-arm-kernel@lists.infradead.org,
linux-parisc@vger.kernel.org, linux-kernel@vger.kernel.org,
Richard Kuo <rkuo@codeaurora.org>,
Paul Burton <paul.burton@mips.com>,
linux-alpha@vger.kernel.org, Ley Foon Tan <lftan@altera.com>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH 14/15] um: switch to generic version of pte allocation
Date: Fri, 3 May 2019 14:28:56 +0100 [thread overview]
Message-ID: <3fddc076-1843-ee84-febb-44c8d317489f@cambridgegreys.com> (raw)
Message-ID: <20190503132856.1V0ykFj6BSMo9eTckd2gPI4a2GDVzzW3ErWxMcxDN4Y@z> (raw)
In-Reply-To: <1556810922-20248-15-git-send-email-rppt@linux.ibm.com>
On 02/05/2019 16:28, Mike Rapoport wrote:
> um allocates PTE pages with __get_free_page() and uses
> GFP_KERNEL | __GFP_ZERO for the allocations.
>
> Switch it to the generic version that does exactly the same thing for the
> kernel page tables and adds __GFP_ACCOUNT for the user PTEs.
>
> The pte_free() and pte_free_kernel() versions are identical to the generic
> ones and can be simply dropped.
>
> Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
> ---
> arch/um/include/asm/pgalloc.h | 16 ++--------------
> arch/um/kernel/mem.c | 22 ----------------------
> 2 files changed, 2 insertions(+), 36 deletions(-)
>
> diff --git a/arch/um/include/asm/pgalloc.h b/arch/um/include/asm/pgalloc.h
> index 99eb568..d7b282e 100644
> --- a/arch/um/include/asm/pgalloc.h
> +++ b/arch/um/include/asm/pgalloc.h
> @@ -10,6 +10,8 @@
>
> #include <linux/mm.h>
>
> +#include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */
> +
> #define pmd_populate_kernel(mm, pmd, pte) \
> set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) __pa(pte)))
>
> @@ -25,20 +27,6 @@
> extern pgd_t *pgd_alloc(struct mm_struct *);
> extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
>
> -extern pte_t *pte_alloc_one_kernel(struct mm_struct *);
> -extern pgtable_t pte_alloc_one(struct mm_struct *);
> -
> -static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
> -{
> - free_page((unsigned long) pte);
> -}
> -
> -static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
> -{
> - pgtable_page_dtor(pte);
> - __free_page(pte);
> -}
> -
> #define __pte_free_tlb(tlb,pte, address) \
> do { \
> pgtable_page_dtor(pte); \
> diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
> index 99aa11b..2280374 100644
> --- a/arch/um/kernel/mem.c
> +++ b/arch/um/kernel/mem.c
> @@ -215,28 +215,6 @@ void pgd_free(struct mm_struct *mm, pgd_t *pgd)
> free_page((unsigned long) pgd);
> }
>
> -pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
> -{
> - pte_t *pte;
> -
> - pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
> - return pte;
> -}
> -
> -pgtable_t pte_alloc_one(struct mm_struct *mm)
> -{
> - struct page *pte;
> -
> - pte = alloc_page(GFP_KERNEL|__GFP_ZERO);
> - if (!pte)
> - return NULL;
> - if (!pgtable_page_ctor(pte)) {
> - __free_page(pte);
> - return NULL;
> - }
> - return pte;
> -}
> -
> #ifdef CONFIG_3_LEVEL_PGTABLES
> pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
> {
>
Reviewed-by: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Acked-by: Anton Ivanov <anton.ivanov@cambridgegreys.com>
--
Anton R. Ivanov
Cambridgegreys Limited. Registered in England. Company Number 10273661
https://www.cambridgegreys.com/
next prev parent reply other threads:[~2019-05-03 14:01 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-02 15:28 [PATCH 00/15] introduce generic pte_{alloc,free}_one[_kernel] Mike Rapoport
2019-05-02 15:28 ` Mike Rapoport
2019-05-02 15:28 ` [PATCH 01/15] asm-generic, x86: introduce generic pte_{alloc, free}_one[_kernel] Mike Rapoport
2019-05-02 15:28 ` [PATCH 01/15] asm-generic, x86: introduce generic pte_{alloc,free}_one[_kernel] Mike Rapoport
2019-05-02 19:03 ` Paul Burton
2019-05-02 19:03 ` Paul Burton
2019-05-05 6:15 ` Mike Rapoport
2019-05-05 6:15 ` Mike Rapoport
2019-05-02 15:28 ` [PATCH 02/15] alpha: switch to generic version of pte allocation Mike Rapoport
2019-05-02 15:28 ` Mike Rapoport
2019-05-02 15:28 ` [PATCH 03/15] arm: " Mike Rapoport
2019-05-02 15:28 ` Mike Rapoport
2019-05-02 15:28 ` [PATCH 04/15] arm64: " Mike Rapoport
2019-05-02 15:28 ` Mike Rapoport
2019-05-03 10:05 ` Mark Rutland
2019-05-03 10:05 ` Mark Rutland
2019-05-05 6:19 ` Mike Rapoport
2019-05-05 6:19 ` Mike Rapoport
2019-05-02 15:28 ` [PATCH 05/15] csky: " Mike Rapoport
2019-05-02 15:28 ` Mike Rapoport
2019-05-03 16:03 ` Guo Ren
2019-05-03 16:03 ` Guo Ren
2019-05-03 16:18 ` Guo Ren
2019-05-03 16:18 ` Guo Ren
2019-05-02 15:28 ` [PATCH 06/15] hexagon: " Mike Rapoport
2019-05-02 15:28 ` Mike Rapoport
2019-05-02 15:28 ` [PATCH 07/15] m68k: sun3: " Mike Rapoport
2019-05-02 15:28 ` Mike Rapoport
2019-05-02 15:28 ` [PATCH 08/15] mips: " Mike Rapoport
2019-05-02 15:28 ` Mike Rapoport
2019-05-02 19:09 ` Paul Burton
2019-05-02 19:09 ` Paul Burton
2019-05-05 6:17 ` Mike Rapoport
2019-05-05 6:17 ` Mike Rapoport
2019-05-02 15:28 ` [PATCH 09/15] nds32: " Mike Rapoport
2019-05-02 15:28 ` Mike Rapoport
2019-05-07 6:49 ` Greentime Hu
2019-05-07 6:49 ` Greentime Hu
2019-05-02 15:28 ` [PATCH 10/15] nios2: " Mike Rapoport
2019-05-02 15:28 ` Mike Rapoport
2019-05-02 15:28 ` [PATCH 11/15] parisc: " Mike Rapoport
2019-05-02 15:28 ` Mike Rapoport
2019-05-02 15:28 ` [PATCH 12/15] powerpc/nohash/64: " Mike Rapoport
2019-05-02 15:28 ` Mike Rapoport
2019-05-02 16:56 ` Christophe Leroy
2019-05-02 16:56 ` Christophe Leroy
2019-05-05 6:23 ` Mike Rapoport
2019-05-05 6:23 ` Mike Rapoport
2019-05-02 15:28 ` [PATCH 13/15] riscv: " Mike Rapoport
2019-05-02 15:28 ` Mike Rapoport
2019-05-06 18:25 ` Palmer Dabbelt
2019-05-06 18:25 ` Palmer Dabbelt
2019-05-02 15:28 ` [PATCH 14/15] um: " Mike Rapoport
2019-05-02 15:28 ` Mike Rapoport
2019-05-03 13:28 ` Anton Ivanov [this message]
2019-05-03 13:28 ` Anton Ivanov
2019-05-02 15:28 ` [PATCH 15/15] unicore32: " Mike Rapoport
2019-05-02 15:28 ` Mike Rapoport
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