Re: [PATCH] MIPS/mm: add compound tail page _mapcount when mapped
On Wed, Aug 22, 2012 at 11:02:34AM +0800, Jovi Zhang wrote: > see commit b6999b191 which target for x86 mm/gup, let it align with > mips architecture. > > Quote from commit b6999b191: > "If compound pages are used and the page is a > tail page, gup_huge_pmd() increases _mapcount to record tail page are > mapped while gup_huge_pud does not do that." Thanks, applied and also acked' for -stable. Note the patch got linewrapped along the way but it's trivial enough to be fixed up. Ralf -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH] MIPS/mm: add compound tail page _mapcount when mapped
On Wed, Aug 22, 2012 at 11:02:34AM +0800, Jovi Zhang wrote: see commit b6999b191 which target for x86 mm/gup, let it align with mips architecture. Quote from commit b6999b191: If compound pages are used and the page is a tail page, gup_huge_pmd() increases _mapcount to record tail page are mapped while gup_huge_pud does not do that. Thanks, applied and also acked' for -stable. Note the patch got linewrapped along the way but it's trivial enough to be fixed up. Ralf -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH] MIPS/mm: add compound tail page _mapcount when mapped
>From 3dc19ea2b535719d0b4177f17bbbff9cbf257b23 Mon Sep 17 00:00:00 2001
From: Jovi Zhang
Date: Wed, 22 Aug 2012 10:34:08 +0800
Subject: [PATCH] MIPS/mm: add compound tail page _mapcount when mapped
see commit b6999b191 which target for x86 mm/gup, let it align with
mips architecture.
Quote from commit b6999b191:
"If compound pages are used and the page is a
tail page, gup_huge_pmd() increases _mapcount to record tail page are
mapped while gup_huge_pud does not do that."
Signed-off-by: Jovi Zhang
Cc: Youquan Song
Cc: Andi Kleen
Cc:
---
arch/mips/mm/gup.c |2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/mips/mm/gup.c b/arch/mips/mm/gup.c
index 33aadbc..dcfd573 100644
--- a/arch/mips/mm/gup.c
+++ b/arch/mips/mm/gup.c
@@ -152,6 +152,8 @@ static int gup_huge_pud(pud_t pud, unsigned long
addr, unsigned long end,
do {
VM_BUG_ON(compound_head(page) != head);
pages[*nr] = page;
+ if (PageTail(page))
+ get_huge_page_tail(page);
(*nr)++;
page++;
refs++;
--
1.7.9.7
--
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[PATCH] MIPS/mm: add compound tail page _mapcount when mapped
From 3dc19ea2b535719d0b4177f17bbbff9cbf257b23 Mon Sep 17 00:00:00 2001
From: Jovi Zhang bookj...@gmail.com
Date: Wed, 22 Aug 2012 10:34:08 +0800
Subject: [PATCH] MIPS/mm: add compound tail page _mapcount when mapped
see commit b6999b191 which target for x86 mm/gup, let it align with
mips architecture.
Quote from commit b6999b191:
If compound pages are used and the page is a
tail page, gup_huge_pmd() increases _mapcount to record tail page are
mapped while gup_huge_pud does not do that.
Signed-off-by: Jovi Zhang booj...@gmail.com
Cc: Youquan Song youquan.s...@intel.com
Cc: Andi Kleen a...@firstfloor.org
Cc: sta...@vger.kernel.org
---
arch/mips/mm/gup.c |2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/mips/mm/gup.c b/arch/mips/mm/gup.c
index 33aadbc..dcfd573 100644
--- a/arch/mips/mm/gup.c
+++ b/arch/mips/mm/gup.c
@@ -152,6 +152,8 @@ static int gup_huge_pud(pud_t pud, unsigned long
addr, unsigned long end,
do {
VM_BUG_ON(compound_head(page) != head);
pages[*nr] = page;
+ if (PageTail(page))
+ get_huge_page_tail(page);
(*nr)++;
page++;
refs++;
--
1.7.9.7
--
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
