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>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>, Andy Lutomirski <luto@kernel.org>, linux-arch@vger.kernel.org Subject: [PATCH 02/17] x86: get rid of superfluous __GFP_REPEAT Date: Mon, 30 May 2016 11:14:44 +0200 [thread overview] Message-ID: <1464599699-30131-3-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-0. This means that this flag has never been actually useful here because it has always been used only for PAGE_ALLOC_COSTLY requests. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: linux-arch@vger.kernel.org Signed-off-by: Michal Hocko <mhocko@suse.com> --- arch/x86/kernel/espfix_64.c | 2 +- arch/x86/mm/pgtable.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/espfix_64.c b/arch/x86/kernel/espfix_64.c index 4d38416e2a7f..04f89caef9c4 100644 --- a/arch/x86/kernel/espfix_64.c +++ b/arch/x86/kernel/espfix_64.c @@ -57,7 +57,7 @@ # error "Need more than one PGD for the ESPFIX hack" #endif -#define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO) +#define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO) /* This contains the *bottom* address of the espfix stack */ DEFINE_PER_CPU_READ_MOSTLY(unsigned long, espfix_stack); diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c index 4eb287e25043..aa0ff4b02a96 100644 --- a/arch/x86/mm/pgtable.c +++ b/arch/x86/mm/pgtable.c @@ -6,7 +6,7 @@ #include <asm/fixmap.h> #include <asm/mtrr.h> -#define PGALLOC_GFP GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO +#define PGALLOC_GFP GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO #ifdef CONFIG_HIGHPTE #define PGALLOC_USER_GFP __GFP_HIGHMEM -- 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>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>, Andy Lutomirski <luto@kernel.org>, linux-arch@vger.kernel.org Subject: [PATCH 02/17] x86: get rid of superfluous __GFP_REPEAT Date: Mon, 30 May 2016 11:14:44 +0200 [thread overview] Message-ID: <1464599699-30131-3-git-send-email-mhocko@kernel.org> (raw) Message-ID: <20160530091444.OYlyDh5NWaNNbA4wQLwRTv3jnUVKikZuK2WwU4dcImI@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-0. This means that this flag has never been actually useful here because it has always been used only for PAGE_ALLOC_COSTLY requests. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: linux-arch@vger.kernel.org Signed-off-by: Michal Hocko <mhocko@suse.com> --- arch/x86/kernel/espfix_64.c | 2 +- arch/x86/mm/pgtable.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/espfix_64.c b/arch/x86/kernel/espfix_64.c index 4d38416e2a7f..04f89caef9c4 100644 --- a/arch/x86/kernel/espfix_64.c +++ b/arch/x86/kernel/espfix_64.c @@ -57,7 +57,7 @@ # error "Need more than one PGD for the ESPFIX hack" #endif -#define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO) +#define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO) /* This contains the *bottom* address of the espfix stack */ DEFINE_PER_CPU_READ_MOSTLY(unsigned long, espfix_stack); diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c index 4eb287e25043..aa0ff4b02a96 100644 --- a/arch/x86/mm/pgtable.c +++ b/arch/x86/mm/pgtable.c @@ -6,7 +6,7 @@ #include <asm/fixmap.h> #include <asm/mtrr.h> -#define PGALLOC_GFP GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO +#define PGALLOC_GFP GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO #ifdef CONFIG_HIGHPTE #define PGALLOC_USER_GFP __GFP_HIGHMEM -- 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 ` Michal Hocko [this message] 2016-05-30 9:14 ` [PATCH 02/17] x86: get rid of superfluous __GFP_REPEAT 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 ` [PATCH 04/17] arm: " Michal Hocko 2016-05-30 9:14 ` 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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