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>So copied everything away to a software raid and tried all the disk >tuning stuff (min-, max-readahead, bdflush, elvtune). Nothing helped. >Last Sunday I then found a hint about a bug introduced in kernel >2.4.19-pre6 which could be fixed using a "dlh", disk latency hack - or >going back to 2.4.18. Last is what I did ( from 2.4.20 ) I made the dlh (disk latency hack) and it is related to a problem of system response under heavy IO load, NOT the actual IO throughput so this sounds unrelated. However, I have seen what you describe with reiserFS and ide raid at least and had it fixed by applying AA's stuck in D fix, which ReiserFS is more prone to for some complicated reason. Give that a go. In http://www.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.4/2.4.20aa1/ it is patch 9980_fix-pausing-2 Regards, Con - 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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