Re: What's in linux-2.6-block.git

[Al Boldi <a1426z@gawab.com>]

Jens Axboe  wrote:
> This lists the main features of the 'block' branch, which is bound for
> Linus when 2.6.19 opens:
>
> - Splitting of request->flags into two parts:
>         - cmd type
>         - modified flags
>   Right now it's a bit of a mess, splitting this up invites a cleaner
>   usage and also enables us to implement generic "messages" passed on
>   the regular queue for the device.
>
> - Abstract out the request back merging and put it into the core io
>   scheduler layer. Cleans up all the io schedulers, and noop gets
>   merging for "free".
>
> - Abstract out the rbtree sorting. Gets rid of duplicated code in
>   as/cfq/deadline.
>
> - General shrinkage of the request structure.
>
> - Killing dynamic rq private structures in deadline/as/cfq. This should
>   speed up the io path somewhat, as we avoid allocating several
>   structures (struct request + scheduler private request) for each io
>   request.
>
> - meta data io logging for blktrace.
>
> - CFQ improvements.
>
> - Make the block layer configurable through Kconfig (David Howells).
>
> - Lots of cleanups.

Does it also address the strange "max_sectors_kb<>192 causes a 50%-slowdown" 
problem?


Thanks!

--
Al

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