From: Michal Hocko <mhocko@kernel.org> To: Andrew Morton <akpm@linux-foundation.org> Cc: linux-mm@kvack.org, LKML <linux-kernel@vger.kernel.org>, Michal Hocko <mhocko@suse.com>, Russell King <linux@arm.linux.org.uk>, linux-arch@vger.kernel.org Subject: [PATCH 04/17] arm: get rid of superfluous __GFP_REPEAT Date: Mon, 30 May 2016 11:14:46 +0200 [thread overview] Message-ID: <1464599699-30131-5-git-send-email-mhocko@kernel.org> (raw) In-Reply-To: <1464599699-30131-1-git-send-email-mhocko@kernel.org> From: Michal Hocko <mhocko@suse.com> __GFP_REPEAT has a rather weak semantic but since it has been introduced around 2.6.12 it has been ignored for low order allocations. PGALLOC_GFP uses __GFP_REPEAT but none of the allocation which uses this flag is for more than order-2. This means that this flag has never been actually useful here because it has always been used only for PAGE_ALLOC_COSTLY requests. Cc: Russell King <linux@arm.linux.org.uk> Cc: linux-arch@vger.kernel.org Signed-off-by: Michal Hocko <mhocko@suse.com> --- arch/arm/include/asm/pgalloc.h | 2 +- arch/arm/mm/pgd.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm/include/asm/pgalloc.h b/arch/arm/include/asm/pgalloc.h index 20febb368844..b2902a5cd780 100644 --- a/arch/arm/include/asm/pgalloc.h +++ b/arch/arm/include/asm/pgalloc.h @@ -57,7 +57,7 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) extern pgd_t *pgd_alloc(struct mm_struct *mm); extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); -#define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO) +#define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO) static inline void clean_pte_table(pte_t *pte) { diff --git a/arch/arm/mm/pgd.c b/arch/arm/mm/pgd.c index b8d477321730..c1c1a5c67da1 100644 --- a/arch/arm/mm/pgd.c +++ b/arch/arm/mm/pgd.c @@ -23,7 +23,7 @@ #define __pgd_alloc() kmalloc(PTRS_PER_PGD * sizeof(pgd_t), GFP_KERNEL) #define __pgd_free(pgd) kfree(pgd) #else -#define __pgd_alloc() (pgd_t *)__get_free_pages(GFP_KERNEL | __GFP_REPEAT, 2) +#define __pgd_alloc() (pgd_t *)__get_free_pages(GFP_KERNEL, 2) #define __pgd_free(pgd) free_pages((unsigned long)pgd, 2) #endif -- 2.8.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
WARNING: multiple messages have this Message-ID (diff)
From: Michal Hocko <mhocko@kernel.org> To: Andrew Morton <akpm@linux-foundation.org> Cc: linux-mm@kvack.org, LKML <linux-kernel@vger.kernel.org>, Michal Hocko <mhocko@suse.com>, Russell King <linux@arm.linux.org.uk>, linux-arch@vger.kernel.org Subject: [PATCH 04/17] arm: get rid of superfluous __GFP_REPEAT Date: Mon, 30 May 2016 11:14:46 +0200 [thread overview] Message-ID: <1464599699-30131-5-git-send-email-mhocko@kernel.org> (raw) Message-ID: <20160530091446.AGoI95hliUTzpe5J7wLGiV_x-JKaoeo2nEU25SGy1xo@z> (raw) In-Reply-To: <1464599699-30131-1-git-send-email-mhocko@kernel.org> From: Michal Hocko <mhocko@suse.com> __GFP_REPEAT has a rather weak semantic but since it has been introduced around 2.6.12 it has been ignored for low order allocations. PGALLOC_GFP uses __GFP_REPEAT but none of the allocation which uses this flag is for more than order-2. This means that this flag has never been actually useful here because it has always been used only for PAGE_ALLOC_COSTLY requests. Cc: Russell King <linux@arm.linux.org.uk> Cc: linux-arch@vger.kernel.org Signed-off-by: Michal Hocko <mhocko@suse.com> --- arch/arm/include/asm/pgalloc.h | 2 +- arch/arm/mm/pgd.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm/include/asm/pgalloc.h b/arch/arm/include/asm/pgalloc.h index 20febb368844..b2902a5cd780 100644 --- a/arch/arm/include/asm/pgalloc.h +++ b/arch/arm/include/asm/pgalloc.h @@ -57,7 +57,7 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) extern pgd_t *pgd_alloc(struct mm_struct *mm); extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); -#define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO) +#define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO) static inline void clean_pte_table(pte_t *pte) { diff --git a/arch/arm/mm/pgd.c b/arch/arm/mm/pgd.c index b8d477321730..c1c1a5c67da1 100644 --- a/arch/arm/mm/pgd.c +++ b/arch/arm/mm/pgd.c @@ -23,7 +23,7 @@ #define __pgd_alloc() kmalloc(PTRS_PER_PGD * sizeof(pgd_t), GFP_KERNEL) #define __pgd_free(pgd) kfree(pgd) #else -#define __pgd_alloc() (pgd_t *)__get_free_pages(GFP_KERNEL | __GFP_REPEAT, 2) +#define __pgd_alloc() (pgd_t *)__get_free_pages(GFP_KERNEL, 2) #define __pgd_free(pgd) free_pages((unsigned long)pgd, 2) #endif -- 2.8.1
next prev parent reply other threads:[~2016-05-30 9:14 UTC|newest] Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <1464599699-30131-1-git-send-email-mhocko@kernel.org> 2016-05-30 9:14 ` [PATCH 01/17] tree wide: get rid of __GFP_REPEAT for order-0 allocations part I Michal Hocko 2016-05-30 9:14 ` Michal Hocko 2016-05-30 9:14 ` [PATCH 02/17] x86: get rid of superfluous __GFP_REPEAT Michal Hocko 2016-05-30 9:14 ` Michal Hocko 2016-05-30 9:14 ` [PATCH 03/17] x86/efi: " Michal Hocko 2016-05-30 9:14 ` Michal Hocko 2016-05-30 9:14 ` Michal Hocko [this message] 2016-05-30 9:14 ` [PATCH 04/17] arm: " Michal Hocko 2016-06-01 16:24 ` Russell King - ARM Linux 2016-06-01 16:24 ` Russell King - ARM Linux 2016-06-02 6:32 ` Michal Hocko 2016-06-02 6:32 ` Michal Hocko 2016-07-20 20:59 ` Andrew Morton 2016-05-30 9:14 ` [PATCH 05/17] arm64: " Michal Hocko 2016-05-30 9:14 ` Michal Hocko 2016-05-30 9:14 ` [PATCH 06/17] arc: " Michal Hocko 2016-05-30 9:14 ` Michal Hocko 2016-05-30 9:14 ` [PATCH 07/17] mips: " Michal Hocko 2016-05-30 9:14 ` Michal Hocko 2016-05-30 9:14 ` [PATCH 08/17] nios2: " Michal Hocko 2016-05-30 9:14 ` Michal Hocko 2016-05-30 9:14 ` [PATCH 09/17] parisc: " Michal Hocko 2016-05-30 9:14 ` Michal Hocko 2016-05-30 9:14 ` [PATCH 10/17] score: " Michal Hocko 2016-05-30 9:14 ` Michal Hocko 2016-05-30 9:14 ` [PATCH 11/17] powerpc: " Michal Hocko 2016-05-30 9:14 ` Michal Hocko 2016-05-30 9:14 ` [PATCH 12/17] sparc: " Michal Hocko 2016-05-30 9:14 ` Michal Hocko 2016-05-30 18:23 ` David Miller 2016-05-30 18:23 ` David Miller 2016-05-30 9:14 ` [PATCH 13/17] s390: " Michal Hocko 2016-05-30 9:14 ` Michal Hocko 2016-05-30 9:14 ` [PATCH 14/17] sh: " Michal Hocko 2016-05-30 9:14 ` Michal Hocko 2016-05-30 9:14 ` [PATCH 15/17] tile: " Michal Hocko 2016-05-30 9:14 ` Michal Hocko 2016-05-30 9:14 ` [PATCH 16/17] unicore32: " Michal Hocko 2016-05-30 9:14 ` Michal Hocko
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