+ x86-get-rid-of-superfluous-__gfp_repeat.patch added to -mm tree

+ x86-get-rid-of-superfluous-__gfp_repeat.patch added to -mm tree

[akpm]

The patch titled
     Subject: x86: get rid of superfluous __GFP_REPEAT
has been added to the -mm tree.  Its filename is
     x86-get-rid-of-superfluous-__gfp_repeat.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/x86-get-rid-of-superfluous-__gfp_repeat.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/x86-get-rid-of-superfluous-__gfp_repeat.patch

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------------------------------------------------------
From: Michal Hocko <mhocko@suse.com>
Subject: x86: get rid of superfluous __GFP_REPEAT

__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.

Link: http://lkml.kernel.org/r/1464599699-30131-3-git-send-email-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/x86/kernel/espfix_64.c |    2 +-
 arch/x86/mm/pgtable.c       |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff -puN arch/x86/kernel/espfix_64.c~x86-get-rid-of-superfluous-__gfp_repeat arch/x86/kernel/espfix_64.c
--- a/arch/x86/kernel/espfix_64.c~x86-get-rid-of-superfluous-__gfp_repeat
+++ a/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 -puN arch/x86/mm/pgtable.c~x86-get-rid-of-superfluous-__gfp_repeat arch/x86/mm/pgtable.c
--- a/arch/x86/mm/pgtable.c~x86-get-rid-of-superfluous-__gfp_repeat
+++ a/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
_

Patches currently in -mm which might be from mhocko@suse.com are

mm-oom_reaper-do-not-use-siglock-in-try_oom_reaper.patch
tree-wide-get-rid-of-__gfp_repeat-for-order-0-allocations-part-i.patch
x86-get-rid-of-superfluous-__gfp_repeat.patch
x86-efi-get-rid-of-superfluous-__gfp_repeat.patch
arm-get-rid-of-superfluous-__gfp_repeat.patch
arm64-get-rid-of-superfluous-__gfp_repeat.patch
arc-get-rid-of-superfluous-__gfp_repeat.patch
mips-get-rid-of-superfluous-__gfp_repeat.patch
nios2-get-rid-of-superfluous-__gfp_repeat.patch
parisc-get-rid-of-superfluous-__gfp_repeat.patch
score-get-rid-of-superfluous-__gfp_repeat.patch
powerpc-get-rid-of-superfluous-__gfp_repeat.patch
sparc-get-rid-of-superfluous-__gfp_repeat.patch
s390-get-rid-of-superfluous-__gfp_repeat.patch
sh-get-rid-of-superfluous-__gfp_repeat.patch
tile-get-rid-of-superfluous-__gfp_repeat.patch
unicore32-get-rid-of-superfluous-__gfp_repeat.patch
jbd2-get-rid-of-superfluous-__gfp_repeat.patch