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From: Michal Hocko <mhocko@kernel.org>
To: <linux-mm@kvack.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Michal Hocko <mhocko@suse.com>,
	"David S. Miller" <davem@davemloft.net>,
	linux-arch@vger.kernel.org
Subject: [PATCH 12/19] sparc: get rid of superfluous __GFP_REPEAT
Date: Mon, 11 Apr 2016 13:08:05 +0200	[thread overview]
Message-ID: <1460372892-8157-13-git-send-email-mhocko@kernel.org> (raw)
In-Reply-To: <1460372892-8157-1-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.

{pud,pmd}_alloc_one is using __GFP_REPEAT but it always allocates from
pgtable_cache which is initialzed to PAGE_SIZE objects. This means that
this flag has never been actually useful here because it has always been
used only for PAGE_ALLOC_COSTLY requests.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-arch@vger.kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
---
 arch/sparc/include/asm/pgalloc_64.h | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/arch/sparc/include/asm/pgalloc_64.h b/arch/sparc/include/asm/pgalloc_64.h
index 5e3187185b4a..3529f1378cd8 100644
--- a/arch/sparc/include/asm/pgalloc_64.h
+++ b/arch/sparc/include/asm/pgalloc_64.h
@@ -41,8 +41,7 @@ static inline void __pud_populate(pud_t *pud, pmd_t *pmd)
 
 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
 {
-	return kmem_cache_alloc(pgtable_cache,
-				GFP_KERNEL|__GFP_REPEAT);
+	return kmem_cache_alloc(pgtable_cache, GFP_KERNEL);
 }
 
 static inline void pud_free(struct mm_struct *mm, pud_t *pud)
@@ -52,8 +51,7 @@ static inline void pud_free(struct mm_struct *mm, pud_t *pud)
 
 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
 {
-	return kmem_cache_alloc(pgtable_cache,
-				GFP_KERNEL|__GFP_REPEAT);
+	return kmem_cache_alloc(pgtable_cache, GFP_KERNEL);
 }
 
 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
-- 
2.8.0.rc3

WARNING: multiple messages have this Message-ID (diff)
From: Michal Hocko <mhocko@kernel.org>
To: linux-mm@kvack.org
Cc: Andrew Morton <akpm@linux-foundation.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Michal Hocko <mhocko@suse.com>,
	"David S. Miller" <davem@davemloft.net>,
	linux-arch@vger.kernel.org
Subject: [PATCH 12/19] sparc: get rid of superfluous __GFP_REPEAT
Date: Mon, 11 Apr 2016 13:08:05 +0200	[thread overview]
Message-ID: <1460372892-8157-13-git-send-email-mhocko@kernel.org> (raw)
In-Reply-To: <1460372892-8157-1-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.

{pud,pmd}_alloc_one is using __GFP_REPEAT but it always allocates from
pgtable_cache which is initialzed to PAGE_SIZE objects. This means that
this flag has never been actually useful here because it has always been
used only for PAGE_ALLOC_COSTLY requests.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-arch@vger.kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
---
 arch/sparc/include/asm/pgalloc_64.h | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/arch/sparc/include/asm/pgalloc_64.h b/arch/sparc/include/asm/pgalloc_64.h
index 5e3187185b4a..3529f1378cd8 100644
--- a/arch/sparc/include/asm/pgalloc_64.h
+++ b/arch/sparc/include/asm/pgalloc_64.h
@@ -41,8 +41,7 @@ static inline void __pud_populate(pud_t *pud, pmd_t *pmd)
 
 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
 {
-	return kmem_cache_alloc(pgtable_cache,
-				GFP_KERNEL|__GFP_REPEAT);
+	return kmem_cache_alloc(pgtable_cache, GFP_KERNEL);
 }
 
 static inline void pud_free(struct mm_struct *mm, pud_t *pud)
@@ -52,8 +51,7 @@ static inline void pud_free(struct mm_struct *mm, pud_t *pud)
 
 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
 {
-	return kmem_cache_alloc(pgtable_cache,
-				GFP_KERNEL|__GFP_REPEAT);
+	return kmem_cache_alloc(pgtable_cache, GFP_KERNEL);
 }
 
 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
-- 
2.8.0.rc3

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WARNING: multiple messages have this Message-ID (diff)
From: Michal Hocko <mhocko@kernel.org>
To: linux-mm@kvack.org
Cc: Andrew Morton <akpm@linux-foundation.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Michal Hocko <mhocko@suse.com>,
	"David S. Miller" <davem@davemloft.net>,
	linux-arch@vger.kernel.org
Subject: [PATCH 12/19] sparc: get rid of superfluous __GFP_REPEAT
Date: Mon, 11 Apr 2016 13:08:05 +0200	[thread overview]
Message-ID: <1460372892-8157-13-git-send-email-mhocko@kernel.org> (raw)
Message-ID: <20160411110805.fUMYStLUqTjrrpuG78VPEWGlJ9ZxruofL2pcdmDNClw@z> (raw)
In-Reply-To: <1460372892-8157-1-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.

{pud,pmd}_alloc_one is using __GFP_REPEAT but it always allocates from
pgtable_cache which is initialzed to PAGE_SIZE objects. This means that
this flag has never been actually useful here because it has always been
used only for PAGE_ALLOC_COSTLY requests.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-arch@vger.kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
---
 arch/sparc/include/asm/pgalloc_64.h | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/arch/sparc/include/asm/pgalloc_64.h b/arch/sparc/include/asm/pgalloc_64.h
index 5e3187185b4a..3529f1378cd8 100644
--- a/arch/sparc/include/asm/pgalloc_64.h
+++ b/arch/sparc/include/asm/pgalloc_64.h
@@ -41,8 +41,7 @@ static inline void __pud_populate(pud_t *pud, pmd_t *pmd)
 
 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
 {
-	return kmem_cache_alloc(pgtable_cache,
-				GFP_KERNEL|__GFP_REPEAT);
+	return kmem_cache_alloc(pgtable_cache, GFP_KERNEL);
 }
 
 static inline void pud_free(struct mm_struct *mm, pud_t *pud)
@@ -52,8 +51,7 @@ static inline void pud_free(struct mm_struct *mm, pud_t *pud)
 
 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
 {
-	return kmem_cache_alloc(pgtable_cache,
-				GFP_KERNEL|__GFP_REPEAT);
+	return kmem_cache_alloc(pgtable_cache, GFP_KERNEL);
 }
 
 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
-- 
2.8.0.rc3


  parent reply	other threads:[~2016-04-11 11:11 UTC|newest]

Thread overview: 103+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-11 11:07 [PATCH 0/19] get rid of superfluous __GFP_REPORT Michal Hocko
2016-04-11 11:07 ` Michal Hocko
2016-04-11 11:07 ` [PATCH 01/19] tree wide: get rid of __GFP_REPEAT for order-0 allocations part I Michal Hocko
2016-04-11 11:07   ` Michal Hocko
2016-04-11 11:07   ` Michal Hocko
2016-04-14 19:56   ` David Rientjes
2016-04-14 19:56     ` David Rientjes
2016-04-15  7:44     ` Michal Hocko
2016-04-15  7:44       ` Michal Hocko
2016-04-15  7:44       ` Michal Hocko
2016-04-15  7:44       ` Michal Hocko
2016-04-11 11:07 ` [PATCH 02/19] x86: get rid of superfluous __GFP_REPEAT Michal Hocko
2016-04-11 11:07   ` Michal Hocko
2016-04-11 11:07   ` Michal Hocko
2016-04-11 11:07 ` [PATCH 03/19] x86/efi: " Michal Hocko
2016-04-11 11:07   ` Michal Hocko
2016-04-11 11:07   ` Michal Hocko
2016-04-12 15:53   ` Matt Fleming
2016-04-12 15:53     ` Matt Fleming
2016-04-11 11:07 ` [PATCH 04/19] arm: " Michal Hocko
2016-04-11 11:07   ` Michal Hocko
2016-04-11 11:07   ` Michal Hocko
2016-04-11 11:07 ` [PATCH 05/19] arm64: " Michal Hocko
2016-04-11 11:07   ` Michal Hocko
2016-04-11 11:07   ` Michal Hocko
2016-04-11 15:49   ` Will Deacon
2016-04-11 15:49     ` Will Deacon
2016-04-11 11:07 ` [PATCH 06/19] arc: " Michal Hocko
2016-04-11 11:07   ` Michal Hocko
2016-04-11 11:07   ` Michal Hocko
2016-04-11 14:23   ` Vineet Gupta
2016-04-11 14:23     ` Vineet Gupta
2016-04-11 11:08 ` [PATCH 07/19] mips: " Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-11 11:08 ` [PATCH 08/19] nios2: " Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-11 11:08 ` [PATCH 09/19] parisc: " Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-11 11:08 ` [PATCH 10/19] score: " Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-11 11:08 ` [PATCH 11/19] powerpc: " Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-11 11:08 ` Michal Hocko [this message]
2016-04-11 11:08   ` [PATCH 12/19] sparc: " Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-11 11:08 ` [PATCH 13/19] s390: " Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-11 11:28   ` Cornelia Huck
2016-04-11 11:28     ` Cornelia Huck
2016-04-11 11:28     ` Cornelia Huck
2016-04-11 12:47     ` Heiko Carstens
2016-04-11 12:47       ` Heiko Carstens
2016-04-11 11:08 ` [PATCH 14/19] sh: " Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-11 11:08 ` [PATCH 15/19] tile: " Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-11 11:08 ` [PATCH 16/19] unicore32: " Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-11 11:08 ` [PATCH 17/19] dm: get rid of superfluous gfp flags Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-15 12:29   ` Mikulas Patocka
2016-04-15 12:29     ` Mikulas Patocka
2016-04-15 13:08     ` Michal Hocko
2016-04-15 13:08       ` Michal Hocko
2016-04-15 18:41       ` Mikulas Patocka
2016-04-15 18:41         ` Mikulas Patocka
2016-04-16 20:31         ` Michal Hocko
2016-04-16 20:31           ` Michal Hocko
2016-04-22 12:47           ` Michal Hocko
2016-04-22 12:47             ` Michal Hocko
2016-04-26 17:20             ` Mikulas Patocka
2016-04-26 17:20               ` Mikulas Patocka
2016-04-27  8:35               ` Michal Hocko
2016-04-27  8:35                 ` Michal Hocko
2016-04-27  8:35                 ` Michal Hocko
2016-04-11 11:08 ` [PATCH 18/19] crypto: get rid of superfluous __GFP_REPEAT Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-14  6:27   ` Herbert Xu
2016-04-14  6:27     ` Herbert Xu
2016-04-14  7:02     ` Michal Hocko
2016-04-14  7:02       ` Michal Hocko
2016-04-14  8:16       ` Herbert Xu
2016-04-14  8:16         ` Herbert Xu
2016-04-14  8:51   ` [PATCH resend] " Michal Hocko
2016-04-14  8:51     ` Michal Hocko
2016-04-15 14:37     ` Herbert Xu
2016-04-15 14:37       ` Herbert Xu
2016-04-11 11:08 ` [PATCH 19/19] jbd2: " Michal Hocko
2016-04-11 11:08   ` Michal Hocko
2016-04-13 11:21 ` CC in git cover letter vs patches (was Re: [PATCH 0/19] get rid of superfluous __GFP_REPORT) Vineet Gupta
2016-04-13 11:21   ` Vineet Gupta
2016-04-13 11:21   ` Vineet Gupta
2016-04-13 13:33   ` Michal Hocko
2016-04-13 13:33     ` Michal Hocko

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