On 23 May 2006, Neil Brown noted: > On Monday May 22, talbotx@xxxxxxxxxxx wrote: >> A few simple questions about the 2.6.16+ kernel and software RAID. >> Does software RAID in the 2.6.16 kernel take advantage of SMP? > > Not exactly. RAID5/6 tends to use just one cpu for parity > calculations, but that frees up other cpus for doing other important > work. To expand on this, that depends on how many RAID arrays you've got, since there's one parity-computation daemon per array. If you have several arrays and are writing to them at the same time, or several arrays and some are degraded, then several md*_raid* daemons might be working at once. But that's not very likely, I'd guess. (I have multiple RAID-5 arrays, but that's only because I'm trying to get useful RAIDing on multiple disks of drastically different size.) -- `On a scale of 1-10, X's "brokenness rating" is 1.1, but that's only because bringing Windows into the picture rescaled "brokenness" by a factor of 10.' --- Peter da Silva - 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
