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Stephen C. Tweedie wrote: > Yep. It scares me to think what performance characteristics we'll start > seeing once that gets used everywhere it's needed, though. If every raw > or O_DIRECT write needs a flush after it, databases are going to become > very sensitive to flush performance. I guess disabling the flushing and > using disks which tell the truth about data hitting the platter is the > sane answer there. For IDE, O_DIRECT and O_SYNC can use special "FUA" commands, which don't return until the data is on the platter. Jeff - 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/ | ||||||||||||
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