[PATCH v5 05/14] mincore: Add support for PUDs

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From: Matthew Wilcox <matthew.r.wilcox@intel.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-nvdimm@lists.01.org, x86@kernel.org,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	linux-fsdevel@vger.kernel.org
Subject: [PATCH v5 05/14] mincore: Add support for PUDs
Date: Thu, 10 Mar 2016 18:55:22 -0500	[thread overview]
Message-ID: <1457654131-4562-6-git-send-email-matthew.r.wilcox@intel.com> (raw)
In-Reply-To: <1457654131-4562-1-git-send-email-matthew.r.wilcox@intel.com>

From: Matthew Wilcox <willy@linux.intel.com>

We don't actually care about the contents of the PUD, as long as it's
present (which is checked by the pagewalk code), so just set the bits
to indicate presence and return.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
---
 mm/mincore.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/mm/mincore.c b/mm/mincore.c
index 563f320..948a906 100644
--- a/mm/mincore.c
+++ b/mm/mincore.c
@@ -108,6 +108,18 @@ static int mincore_unmapped_range(unsigned long addr, unsigned long end,
 	return 0;
 }
 
+static int mincore_pud_range(pud_t *pud, unsigned long addr, unsigned long end,
+			struct mm_walk *walk)
+{
+	unsigned char *vec = walk->private;
+	int nr = (end - addr) >> PAGE_SHIFT;
+
+	memset(vec, 1, nr);
+	walk->private += nr;
+
+	return 0;
+}
+
 static int mincore_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
 			struct mm_walk *walk)
 {
@@ -177,6 +189,7 @@ static long do_mincore(unsigned long addr, unsigned long pages, unsigned char *v
 	unsigned long end;
 	int err;
 	struct mm_walk mincore_walk = {
+		.pud_entry = mincore_pud_range,
 		.pmd_entry = mincore_pte_range,
 		.pte_hole = mincore_unmapped_range,
 		.hugetlb_entry = mincore_hugetlb,
-- 
2.7.0

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WARNING: multiple messages have this Message-ID (diff)

From: Matthew Wilcox <matthew.r.wilcox@intel.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Matthew Wilcox <willy@linux.intel.com>,
	linux-mm@kvack.org, linux-nvdimm@ml01.01.org,
	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	x86@kernel.org
Subject: [PATCH v5 05/14] mincore: Add support for PUDs
Date: Thu, 10 Mar 2016 18:55:22 -0500	[thread overview]
Message-ID: <1457654131-4562-6-git-send-email-matthew.r.wilcox@intel.com> (raw)
In-Reply-To: <1457654131-4562-1-git-send-email-matthew.r.wilcox@intel.com>

From: Matthew Wilcox <willy@linux.intel.com>

We don't actually care about the contents of the PUD, as long as it's
present (which is checked by the pagewalk code), so just set the bits
to indicate presence and return.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
---
 mm/mincore.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/mm/mincore.c b/mm/mincore.c
index 563f320..948a906 100644
--- a/mm/mincore.c
+++ b/mm/mincore.c
@@ -108,6 +108,18 @@ static int mincore_unmapped_range(unsigned long addr, unsigned long end,
 	return 0;
 }
 
+static int mincore_pud_range(pud_t *pud, unsigned long addr, unsigned long end,
+			struct mm_walk *walk)
+{
+	unsigned char *vec = walk->private;
+	int nr = (end - addr) >> PAGE_SHIFT;
+
+	memset(vec, 1, nr);
+	walk->private += nr;
+
+	return 0;
+}
+
 static int mincore_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
 			struct mm_walk *walk)
 {
@@ -177,6 +189,7 @@ static long do_mincore(unsigned long addr, unsigned long pages, unsigned char *v
 	unsigned long end;
 	int err;
 	struct mm_walk mincore_walk = {
+		.pud_entry = mincore_pud_range,
 		.pmd_entry = mincore_pte_range,
 		.pte_hole = mincore_unmapped_range,
 		.hugetlb_entry = mincore_hugetlb,
-- 
2.7.0

WARNING: multiple messages have this Message-ID (diff)

From: Matthew Wilcox <matthew.r.wilcox@intel.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Matthew Wilcox <willy@linux.intel.com>,
	linux-mm@kvack.org, linux-nvdimm@lists.01.org,
	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	x86@kernel.org
Subject: [PATCH v5 05/14] mincore: Add support for PUDs
Date: Thu, 10 Mar 2016 18:55:22 -0500	[thread overview]
Message-ID: <1457654131-4562-6-git-send-email-matthew.r.wilcox@intel.com> (raw)
In-Reply-To: <1457654131-4562-1-git-send-email-matthew.r.wilcox@intel.com>

From: Matthew Wilcox <willy@linux.intel.com>

We don't actually care about the contents of the PUD, as long as it's
present (which is checked by the pagewalk code), so just set the bits
to indicate presence and return.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
---
 mm/mincore.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/mm/mincore.c b/mm/mincore.c
index 563f320..948a906 100644
--- a/mm/mincore.c
+++ b/mm/mincore.c
@@ -108,6 +108,18 @@ static int mincore_unmapped_range(unsigned long addr, unsigned long end,
 	return 0;
 }
 
+static int mincore_pud_range(pud_t *pud, unsigned long addr, unsigned long end,
+			struct mm_walk *walk)
+{
+	unsigned char *vec = walk->private;
+	int nr = (end - addr) >> PAGE_SHIFT;
+
+	memset(vec, 1, nr);
+	walk->private += nr;
+
+	return 0;
+}
+
 static int mincore_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
 			struct mm_walk *walk)
 {
@@ -177,6 +189,7 @@ static long do_mincore(unsigned long addr, unsigned long pages, unsigned char *v
 	unsigned long end;
 	int err;
 	struct mm_walk mincore_walk = {
+		.pud_entry = mincore_pud_range,
 		.pmd_entry = mincore_pte_range,
 		.pte_hole = mincore_unmapped_range,
 		.hugetlb_entry = mincore_hugetlb,
-- 
2.7.0

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next prev parent reply	other threads:[~2016-03-10 23:55 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-10 23:55 [PATCH v5 00/14] Support for transparent PUD pages for DAX files Matthew Wilcox
2016-03-10 23:55 ` Matthew Wilcox
2016-03-10 23:55 ` Matthew Wilcox
2016-03-10 23:55 ` [PATCH v5 01/14] mmdebug: Always evaluate the arguments to VM_BUG_ON_* Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55 ` [PATCH v5 02/14] mm: Convert an open-coded VM_BUG_ON_VMA Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55 ` [PATCH v5 03/14] mm,fs,dax: Change ->pmd_fault to ->huge_fault Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55 ` [PATCH v5 04/14] mm: Add support for PUD-sized transparent hugepages Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55 ` Matthew Wilcox [this message]
2016-03-10 23:55   ` [PATCH v5 05/14] mincore: Add support for PUDs Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55 ` [PATCH v5 06/14] procfs: Add support for PUDs to smaps, clear_refs and pagemap Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55 ` [PATCH v5 07/14] x86: Unify native_*_get_and_clear !SMP case Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55 ` [PATCH v5 08/14] x86: Fix whitespace issues Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55 ` [PATCH v5 09/14] x86: Add support for PUD-sized transparent hugepages Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55 ` [PATCH v5 10/14] dax: Support for transparent PUD pages Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55 ` [PATCH v5 11/14] ext4: Support for PUD-sized transparent huge pages Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55 ` [PATCH v5 12/14] dax: Use vmf->gfp_mask Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55 ` [PATCH v5 13/14] dax: Remove unnecessary rechecking of i_size Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55 ` [PATCH v5 14/14] dax: Use vmf->pgoff in fault handlers Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox
2016-03-10 23:55   ` Matthew Wilcox

find likely ancestor, descendant, or conflicting patches for this message:
dfblob:563f320 dfblob:563f320 dfblob:563f320 dfblob:948a906
dfblob:948a906 dfblob:948a906
	(help)

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