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Re: [dm-devel] New -udm?



On 2005-04-11T02:27:11, Mike Christie <mikenc us ibm com> wrote:

> what is wrong with what you have now where you utilize the queue/path's 
> mempool by doing a blk_get_request with GFP_WAIT? 

... what if it's trying to free memory by going to swap on multipath,
and can't, because we're blocked on getting the request with
GFP_WAIT...?

Your patch helps, because it means we need less memory.

But, ultimately, we ought to preallocate the requests already when the
hw-handler is initialized for a map (because presumably at that time
we'll have enough memory, or can just fail the table setup). From that
point on, our memory useage should not grow.


Sincerely,
    Lars Marowsky-Brée <lmb suse de>

-- 
High Availability & Clustering
SUSE Labs, Research and Development
SUSE LINUX Products GmbH - A Novell Business


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