On Fri, 2013-12-13 at 15:58 -0800, Andy Grover wrote: > Hi Nicholas, > > This patchset uses krefs to refcount structures shared across threads. > LIO is full of these because configfs-based configuration actions can > be removing an object, even while that object is being used by a SCSI > command. > > Using kref to free the struct on whichever thread drops the last > reference allows us to avoid busy-waiting in configfs removal functions. > Next, this set removes the statically-sized tpg lun and deve arrays in > favor of dynamically adding entries into rbtrees. This reduces memory > consumption and allows more than 255 luns per tpg and initiator mapping. > > Except for some rbtree lookups, these changes are entirely in the > configuration paths of Lio. I have tested these as extensively as I can, > and it's ready for wider testing. > > Note: patch 22 converts a percpu refcount to a normal kref. I'd argue > the benefit is really in the "refcount" part rather than the "percpu", > so a simpler kref does the job, but we might want to discuss this some > more. > It would be helpful to breakup future patches into different series based on: * Bugfixes * New features * Minor improvements Thanks, --nab -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
