On 12/26/2013 2:55 AM, Christoph Hellwig wrote: > On Sat, Dec 21, 2013 at 05:18:42AM -0600, Stan Hoeppner wrote: >> The powers that be, Linus in particular, are not fond of default >> settings that create a lot of kernel memory structures. The default >> md-RAID5/6 stripe_cache-size yields 1MB consumed per member device. > > The default sizing is stupid as it basically makes RAID unusable out > of the box, I always have to fix that up, as well as a somewhat > reasonable chunk size for parity RAID to make it usable. I'm also > pretty sure I complained about it at least once a while ago, but never > got a reply. IIRC you Dave C. and myself all voiced criticism after the default chunk size was changed from 64KB to 512KB. I guess we didn't make a strong enough case to have it reduced, or maybe didn't use the right approach. Maybe Neil is waiting for patches to be submitted for changing these defaults, and to argue the merits in that context instead of pure discussion? Dunno. Just guessing. Maybe he'll read this and jump in. -- Stan -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
