* Can I/O order be guaranteed by submitting sycn bio
@ 2009-05-09 2:25 谢纲
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From: 谢纲 @ 2009-05-09 2:25 UTC (permalink / raw)
To: linux-kernel
Hi,
Some journal file systems submits sycn bio to do ordered write if the
device does not support barrier i/o. But the sync bio only implies the
unplug of the request queue. Some elevators may reorder the request.
It's seems that the bio only with BIO_RW_SYNC flag could not guarantee
the write order. Is this true?
If so, is there any better way to do ordered write when there is no
barrier i/o support.
Thanks,
--
Xie Gang
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2009-05-09 2:25 Can I/O order be guaranteed by submitting sycn bio 谢纲
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