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 v4 4/8] mincore: Add support for PUDs Date: Sun, 31 Jan 2016 23:09:31 +1100 [thread overview] Message-ID: <1454242175-16870-5-git-send-email-matthew.r.wilcox@intel.com> (raw) In-Reply-To: <1454242175-16870-1-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.rc3 -- 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: 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 v4 4/8] mincore: Add support for PUDs Date: Sun, 31 Jan 2016 23:09:31 +1100 [thread overview] Message-ID: <1454242175-16870-5-git-send-email-matthew.r.wilcox@intel.com> (raw) In-Reply-To: <1454242175-16870-1-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.rc3
next prev parent reply other threads:[~2016-01-31 12:09 UTC|newest] Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-01-31 12:09 [PATCH v4 0/8] Support for transparent PUD pages for DAX files Matthew Wilcox 2016-01-31 12:09 ` Matthew Wilcox 2016-01-31 12:09 ` [PATCH v4 1/8] mm: Convert an open-coded VM_BUG_ON_VMA Matthew Wilcox 2016-01-31 12:09 ` Matthew Wilcox 2016-01-31 12:09 ` [PATCH v4 2/8] mm,fs,dax: Change ->pmd_fault to ->huge_fault Matthew Wilcox 2016-01-31 12:09 ` Matthew Wilcox 2016-01-31 12:09 ` [PATCH v4 3/8] mm: Add support for PUD-sized transparent hugepages Matthew Wilcox 2016-01-31 12:09 ` Matthew Wilcox 2016-03-29 22:17 ` Andrew Morton 2016-03-29 22:17 ` Andrew Morton 2016-03-30 14:05 ` Wilcox, Matthew R 2016-03-30 14:05 ` Wilcox, Matthew R 2016-01-31 12:09 ` Matthew Wilcox [this message] 2016-01-31 12:09 ` [PATCH v4 4/8] mincore: Add support for PUDs Matthew Wilcox 2016-01-31 12:09 ` [PATCH v4 5/8] procfs: Add support for PUDs to smaps, clear_refs and pagemap Matthew Wilcox 2016-01-31 12:09 ` Matthew Wilcox 2016-01-31 12:09 ` [PATCH v4 6/8] x86: Add support for PUD-sized transparent hugepages Matthew Wilcox 2016-01-31 12:09 ` Matthew Wilcox 2016-01-31 12:09 ` [PATCH v4 7/8] dax: Support for transparent PUD pages Matthew Wilcox 2016-01-31 12:09 ` Matthew Wilcox 2016-01-31 12:09 ` [PATCH v4 8/8] ext4: Support for PUD-sized transparent huge pages Matthew Wilcox 2016-01-31 12:09 ` Matthew Wilcox
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