Re: [PATCH] slabify iocontext + request_queue

[Christoph Hellwig]

this just went in:

>  From: Jens Axboe <axboe@xxxxxxx>
> 
> Move both request_queue and io_context allocation to a slab cache.
> 
> This is mainly a space-saving exercise.  Some setups have a lot of disks
> and the kmalloc rounding-up can consume significant amounts of memory.

While I agree on the io_context part, slabifying request_queue is a space
waste on most machines out there.  The averange desktop has less than a
handfull of these, and even for smaller servers it doesn't exactly look
like a gain.
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