Re: [PATCH 22/33] readahead: initial method

[Nick Piggin]

BTW. while your patchset might be nicely broken down, I think your
naming and descriptions are letting it down a little bit.

Wu Fengguang wrote:

> Aggressive readahead policy for read on start-of-file.
>
> Instead of selecting a conservative readahead size,
> it tries to do large readahead in the first place.
>
> However we have to watch on two cases:
> 	- do not ruin the hit rate for file-head-checkers
> 	- do not lead to thrashing for memory tight systems

How does it handle
            -  don't needlessly readahead too much if the file is in cache


Would the current readahead mechanism benefit from more aggressive 
start-of-file
readahead?

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