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authorAdrian Hunter <ext-adrian.hunter@nokia.com>2008-09-04 09:26:00 -0400
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2008-09-30 04:12:56 -0400
commit2953e73f1ce4b3284b409aefb9d46bbde6515c37 (patch)
tree56126c6a589bd0450eb288db6a93946e50e5bc29 /Documentation
parent4793e7c5e1c88382ead18db5ca072bac54467318 (diff)
UBIFS: add no_chk_data_crc mount option
UBIFS read performance can be improved by skipping the CRC check when data nodes are read. This option can be used if the underlying media is considered to be highly reliable. Note that CRCs are always checked for metadata. Read speed on Arm platform with OneNAND goes from 19 MiB/s to 27 MiB/s with data CRC checking disabled. Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/filesystems/ubifs.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/filesystems/ubifs.txt b/Documentation/filesystems/ubifs.txt
index 340512c32506..dd84ea3c10da 100644
--- a/Documentation/filesystems/ubifs.txt
+++ b/Documentation/filesystems/ubifs.txt
@@ -89,6 +89,12 @@ fast_unmount do not commit on unmount; this option makes
89bulk_read read more in one go to take advantage of flash 89bulk_read read more in one go to take advantage of flash
90 media that read faster sequentially 90 media that read faster sequentially
91no_bulk_read (*) do not bulk-read 91no_bulk_read (*) do not bulk-read
92no_chk_data_crc skip checking of CRCs on data nodes in order to
93 improve read performance. Use this option only
94 if the flash media is highly reliable. The effect
95 of this option is that corruption of the contents
96 of a file can go unnoticed.
97chk_data_crc (*) do not skip checking CRCs on data nodes
92 98
93 99
94Quick usage instructions 100Quick usage instructions