Re: [PATCH] readahead:add blk_run_backing_dev

[KOSAKI Motohiro]

> > >> >I mean, you should get >300MB/s throughput with 7 disks, and you
> > >> >should seek ways to achieve that before testing out this patch :-)
> > >> 
> > >> Throughput number of storage array is very from one product to another.
> > >> On my hardware environment I think this number is valid and
> > >> my patch is effective.
> > >
> > >What's your readahead size? Is it large enough to cover the stripe width?
> > 
> > Do you mean strage's readahead size?
> 
> What's strage? I mean if your RAID's block device file is /dev/sda, then

I guess it's typo :-)
but I recommend he use sane test environment...


> 
>         blockdev --getra /dev/sda
> 
> will tell its readahead size in unit of 512 bytes.
> 
> Thanks,
> Fengguang
> 



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