On 04/22/2015 09:12 PM, brace wrote: > The last I read about mempools was from: > Linux Device Drivers > By Jonathan Corbet, Alessandro Rubini, Greg Kroah-Hartman > > https://lwn.net/images/pdf/LDD3/ch08.pdf > > > If you are considering using a mempool in your driver, please keep > one thing in > mind: mempools allocate a chunk of memory that sits in a list, idle and > unavailable > for any real use. It is easy to consume a great deal of memory with mempools. > In > almost every case, the preferred alternative is to do without the mempool and > simply > deal with the possibility of allocation failures instead. If there is any way > for your > driver to respond to an allocation failure in a way that does not endanger > the integ- > rity of the system, do things that way. Use of mempools in driver code should > be > rare > > But this book is now quite old in Linux terms. > > So, I can investigate using mempools. However, I would prefer to continue > using the existing methods in this current patchset. > > I hope that is ok with you... > Yes, that's okay with me.
Personally I would be using mempools when you need lots of small, frequently changed allocations (like sg elements), and kzalloc() for large or infrequently changed bits of memory. Reviewed-by: Hannes Reinecke <[email protected]> Cheers, Hannes -- Dr. Hannes Reinecke zSeries & Storage [email protected] +49 911 74053 688 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton HRB 21284 (AG Nürnberg) -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
