Messages in this thread | | | Date | Sat, 9 May 2009 10:25:29 +0800 | Subject | Can I/O order be guaranteed by submitting sycn bio | From | 谢纲 <> |
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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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