[dm-devel] New -udm?
Lars Marowsky-Bree
lmb at suse.de
Mon Apr 11 11:43:09 UTC 2005
On 2005-04-11T02:27:11, Mike Christie <mikenc at 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 at suse.de>
--
High Availability & Clustering
SUSE Labs, Research and Development
SUSE LINUX Products GmbH - A Novell Business
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