Re: [PATCH V6 ] mm readahead: Fix readahead fail for memoryless cpu and limit readahead pages

[Raghavendra K T]

On 03/17/2014 07:37 AM, Madper Xie wrote:
> Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx> writes:
>
> > On 02/18/2014 03:19 PM, Jan Kara wrote:
> > > On Tue 18-02-14 12:55:38, Raghavendra K T wrote:
> Hi. Just a concern. Will the performance reduce on some special storage
> backend? E.g. tape.
> The existent applications may using readahead for userspace I/O schedule
> to decrease seeking time.

I have not tested the patch on such systems yet unfortunately :(.
Sequential read with huge file has not suffered on disk based system,
but I think, I should be honest enough not to guess the effect on tape.

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