From: Ross Zwisler <ross.zwisler@linux.intel.com>
To: linux-kernel@vger.kernel.org
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
"J. Bruce Fields" <bfields@fieldses.org>,
"Theodore Ts'o" <tytso@mit.edu>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Andreas Dilger <adilger.kernel@dilger.ca>,
Dave Chinner <david@fromorbit.com>,
Ingo Molnar <mingo@redhat.com>, Jan Kara <jack@suse.com>,
Jeff Layton <jlayton@poochiereds.net>,
Matthew Wilcox <willy@linux.intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-mm@kvack.org, linux-nvdimm@ml01.01.org, x86@kernel.org,
xfs@oss.sgi.com, Andrew Morton <akpm@linux-foundation.org>,
Dan Williams <dan.j.williams@intel.com>,
Matthew Wilcox <matthew.r.wilcox@intel.com>,
Dave Hansen <dave.hansen@linux.intel.com>
Subject: [PATCH v3 5/7] ext2: call dax_pfn_mkwrite() for DAX fsync/msync
Date: Tue, 8 Dec 2015 12:18:43 -0700 [thread overview]
Message-ID: <1449602325-20572-6-git-send-email-ross.zwisler@linux.intel.com> (raw)
In-Reply-To: <1449602325-20572-1-git-send-email-ross.zwisler@linux.intel.com>
To properly support the new DAX fsync/msync infrastructure filesystems
need to call dax_pfn_mkwrite() so that DAX can track when user pages are
dirtied.
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
---
fs/ext2/file.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index 11a42c5..2c88d68 100644
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c
@@ -102,8 +102,8 @@ static int ext2_dax_pfn_mkwrite(struct vm_area_struct *vma,
{
struct inode *inode = file_inode(vma->vm_file);
struct ext2_inode_info *ei = EXT2_I(inode);
- int ret = VM_FAULT_NOPAGE;
loff_t size;
+ int ret;
sb_start_pagefault(inode->i_sb);
file_update_time(vma->vm_file);
@@ -113,6 +113,8 @@ static int ext2_dax_pfn_mkwrite(struct vm_area_struct *vma,
size = (i_size_read(inode) + PAGE_SIZE - 1) >> PAGE_SHIFT;
if (vmf->pgoff >= size)
ret = VM_FAULT_SIGBUS;
+ else
+ ret = dax_pfn_mkwrite(vma, vmf);
up_read(&ei->dax_sem);
sb_end_pagefault(inode->i_sb);
--
2.5.0
next prev parent reply other threads:[~2015-12-08 19:21 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-08 19:18 [PATCH v3 0/7] DAX fsync/msync support Ross Zwisler
2015-12-08 19:18 ` [PATCH v3 1/7] pmem: add wb_cache_pmem() to the PMEM API Ross Zwisler
2015-12-08 19:18 ` [PATCH v3 2/7] dax: support dirty DAX entries in radix tree Ross Zwisler
2015-12-18 9:01 ` Jan Kara
2015-12-19 5:23 ` Ross Zwisler
2015-12-08 19:18 ` [PATCH v3 3/7] mm: add find_get_entries_tag() Ross Zwisler
2015-12-09 19:44 ` Dan Williams
2015-12-10 20:24 ` Ross Zwisler
2015-12-10 20:31 ` Dan Williams
2015-12-18 9:33 ` Jan Kara
2015-12-08 19:18 ` [PATCH v3 4/7] dax: add support for fsync/sync Ross Zwisler
2015-12-08 19:18 ` Ross Zwisler [this message]
2015-12-08 19:18 ` [PATCH v3 6/7] ext4: call dax_pfn_mkwrite() for DAX fsync/msync Ross Zwisler
2015-12-08 19:18 ` [PATCH v3 7/7] xfs: " Ross Zwisler
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