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| Started by | Ross Zwisler <ross.zwisler@linux.intel.com> |
|---|---|
| First post | 2015-12-19 06:30 +0100 |
| Last post | 2015-12-19 06:30 +0100 |
| Articles | 1 — 1 participant |
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[PATCH v5 7/7] xfs: call dax_pfn_mkwrite() for DAX fsync/msync Ross Zwisler <ross.zwisler@linux.intel.com> - 2015-12-19 06:30 +0100
| From | Ross Zwisler <ross.zwisler@linux.intel.com> |
|---|---|
| Date | 2015-12-19 06:30 +0100 |
| Subject | [PATCH v5 7/7] xfs: call dax_pfn_mkwrite() for DAX fsync/msync |
| Message-ID | <qHifF-7oh-23@gated-at.bofh.it> |
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/xfs/xfs_file.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index f5392ab..40ffbb1 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -1603,9 +1603,8 @@ xfs_filemap_pmd_fault( /* * pfn_mkwrite was originally inteneded to ensure we capture time stamp * updates on write faults. In reality, it's need to serialise against - * truncate similar to page_mkwrite. Hence we open-code dax_pfn_mkwrite() - * here and cycle the XFS_MMAPLOCK_SHARED to ensure we serialise the fault - * barrier in place. + * truncate similar to page_mkwrite. Hence we cycle the XFS_MMAPLOCK_SHARED + * to ensure we serialise the fault barrier in place. */ static int xfs_filemap_pfn_mkwrite( @@ -1628,6 +1627,8 @@ xfs_filemap_pfn_mkwrite( size = (i_size_read(inode) + PAGE_SIZE - 1) >> PAGE_SHIFT; if (vmf->pgoff >= size) ret = VM_FAULT_SIGBUS; + else if (IS_DAX(inode)) + ret = dax_pfn_mkwrite(vma, vmf); xfs_iunlock(ip, XFS_MMAPLOCK_SHARED); sb_end_pagefault(inode->i_sb); return ret; -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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