linux-kernel - [RFC PATCH 0/4] hugetlbfs: add fallocate support

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Date:	Thu, 16 Apr 2015 16:02:54 -0700
From:	Mike Kravetz <mike.kravetz@...cle.com>
To:	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Cc:	Dave Hansen <dave.hansen@...ux.intel.com>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	David Rientjes <rientjes@...gle.com>,
	Hugh Dickins <hughd@...gle.com>,
	Davidlohr Bueso <dave@...olabs.net>,
	Aneesh Kumar <aneesh.kumar@...ux.vnet.ibm.com>,
	Mike Kravetz <mike.kravetz@...cle.com>
Subject: [RFC PATCH 0/4] hugetlbfs: add fallocate support

hugetlbfs is used today by applications that want a high degree of
control over huge page usage.  Often, large hugetlbfs files are used
to map a large number huge pages into the application processes.
The applications know when page ranges within these large files will
no longer be used, and ideally would like to release them back to
the subpool or global pools for other uses.  The fallocate() system
call provides an interface for preallocation and hole punching within
files.  This patch set adds fallocate functionality to hugetlbfs.

Mike Kravetz (4):
  hugetlbfs: truncate_hugepages() takes a range of pages
  hugetlbfs: New huge_add_to_page_cache helper routine
  hugetlbfs: add hugetlbfs_fallocate()
  mm: madvise allow remove operation for hugetlbfs

 fs/hugetlbfs/inode.c    | 164 ++++++++++++++++++++++++++++++++++++++++++++++--
 include/linux/hugetlb.h |   5 ++
 mm/hugetlb.c            |  29 ++++++---
 mm/madvise.c            |   2 +-
 4 files changed, 185 insertions(+), 15 deletions(-)

-- 
2.1.0

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