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.
-- | Dave Jones. http://www.codemonkey.org.uk | SuSE Labs . - 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/
This archive was generated by hypermail 2b29 : Sun Dec 23 2001 - 21:00:24 EST