Re: [Lsf-pc] [LSF/MM TOPIC] a few storage topics

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Christoph Hellwig <hch@xxxxxxxxxxxxx> writes:

> All three filesystems use the generic mpages code for reads, so they
> all get the same (bad) I/O patterns.  Looks like we need to fix this up

Actually, in discussing this with Vivek, he mentioned that read ahead
might be involved.  Sure enough, after bumping read_ahead_kb, 1MB I/Os
are sent down to the storage (for xfs anyway).


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