On Monday 10 August 2009 16:18:12 Nikanth Karthikesan wrote: > On Saturday 08 August 2009 10:25:53 Nikanth Karthikesan wrote: > > Hi > > > > Currently for device-mapper devices, we initialize the mempool for > > requests and elevator at device creation time. But only request-based > > devices use the elevator and mempool. These patches change it to allocate > > the mempool and initialize the elevator only for request-based devices. > > This is done by allocating a queue at device creation time, but delaying > > the initialization of elevator and allocation of mempool till the first > > table load time, when the type of device would be known. > > > > [PATCH 1/2] Allow delaying initialization of queue after allocation > > > > [PATCH 2/2] Initialize mempool and elevator only for request-based dm > > devices > > > > Another approach would be to free the mempool and detach elevator, if it > > would be a bio-based device. But it is better to avoid initialization > > itself. > > Changes since v1: > 1. Refreshed on top of a4e7d46407d73f35d217013b363b79a8f8eafcaa > 2. Added comments suggested by Mike Snitzer. > 3. Cleaned up the second patch as suggested by Mike Snitzer. > Changes since v2: 1. Add comments suggested by Kiyoshi Ueda 2. Export symbol elv_register_queue() to modules. 3. Call elv_register_queue() after initializing the queue to use the elevator. Thanks Nikanth -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
