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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2011-03-10 16:26:32 +0200
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2011-03-11 10:52:07 +0200
commit2bcf002159c2aedd5c0ab5a21c3ea73fec87ff8d (patch)
treea3218befd44eb549cc915044e23c85c6bacf5986 /Documentation/filesystems/ubifs.txt
parentcce3f612fedcbeee61977497b99bbf68a4082b6b (diff)
downloadblackbird-op-linux-2bcf002159c2aedd5c0ab5a21c3ea73fec87ff8d.tar.gz
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UBIFS: do not check data crc by default
Change the default UBIFS behavior WRT data CRC checking. Currently, UBIFS checks data CRC when reading, which slows it down quite a bit, and this is the default option. However, it looks like in average user does not need this feature and would prefer faster read speed over extra reliability. And this seems to be de-facto standard that file-systems do not check data CRC every time they read from the media. Thus, make UBIFS default behavior so that it does not check data CRC. This corresponds to the no_chk_data_crc mount option. Those users who need extra protection can always enable it using the chk_data_crc option. Please, read more information about this feature here: http://www.linux-mtd.infradead.org/doc/ubifs.html#L_checksumming Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'Documentation/filesystems/ubifs.txt')
-rw-r--r--Documentation/filesystems/ubifs.txt4
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/filesystems/ubifs.txt b/Documentation/filesystems/ubifs.txt
index 12fedb7834c6..d7b13b01e980 100644
--- a/Documentation/filesystems/ubifs.txt
+++ b/Documentation/filesystems/ubifs.txt
@@ -82,12 +82,12 @@ Mount options
bulk_read read more in one go to take advantage of flash
media that read faster sequentially
no_bulk_read (*) do not bulk-read
-no_chk_data_crc skip checking of CRCs on data nodes in order to
+no_chk_data_crc (*) skip checking of CRCs on data nodes in order to
improve read performance. Use this option only
if the flash media is highly reliable. The effect
of this option is that corruption of the contents
of a file can go unnoticed.
-chk_data_crc (*) do not skip checking CRCs on data nodes
+chk_data_crc do not skip checking CRCs on data nodes
compr=none override default compressor and set it to "none"
compr=lzo override default compressor and set it to "lzo"
compr=zlib override default compressor and set it to "zlib"
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