Messages in this thread |  | | Date | Fri, 21 Dec 2001 00:08:06 +0000 | | From | Dave Jones <> | | Subject | Possible O_DIRECT problems ? |
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Andrea, lk, I just experimented with O_DIRECT in conjunction with fsx, and the results aren't pretty.
Over NFS it survives around 921 operations, all local filesystems (ext2,ext3,reiser tested) just 6 operations. I've put the source to a modified fsx at http://www.codemonkey.org.uk/cruft/fsx-odirect.c
It's possible I've done something wrong here, so look it over. Just adding O_DIRECT flag to open() should be all thats necessary correct ?
Also note, that by changing the flags on line 988 to have O_DIRECT also, we get different failure type.
So, did I get the usage of O_DIRECT correct and find some bugs, or have I had a little too much xmas spirits already ? 8-)
Dave.
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