dax: some small updates to dax.txt documentation
These are originally from Matthew Wilcox and were part of his huge "mm,fs,dax: Change ->pmd_fault to ->huge_fault" patch that was part of PUD support. I'm breaking these small changes out as they stand on their own and add useful information to Documentation/filesystems/dax.txt. Link: http://lkml.kernel.org/r/20160714214049.20075-1-ross.zwisler@linux.intel.com Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Andreas Dilger <adilger.kernel@dilger.ca> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Chinner <david@fromorbit.com> Cc: Jan Kara <jack@suse.com> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -49,6 +49,7 @@ These block devices may be used for inspiration:
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- axonram: Axon DDR2 device driver
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- brd: RAM backed block device driver
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- dcssblk: s390 dcss block device driver
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- pmem: NVDIMM persistent memory driver
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Implementation Tips for Filesystem Writers
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@ -75,8 +76,9 @@ calls to get_block() (for example by a page-fault racing with a read()
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or a write()) work correctly.
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These filesystems may be used for inspiration:
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- ext2: the second extended filesystem, see Documentation/filesystems/ext2.txt
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- ext4: the fourth extended filesystem, see Documentation/filesystems/ext4.txt
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- ext2: see Documentation/filesystems/ext2.txt
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- ext4: see Documentation/filesystems/ext4.txt
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- xfs: see Documentation/filesystems/xfs.txt
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Handling Media Errors
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