Mark Lord <kernel@xxxxxxxxxxxx> writes: > On 12-04-18 10:15 PM, Joe Ceklosky wrote: >> All, >> >> Has anyone reported slowness using SSD's on kernel 3.3.X compiled >> as 32-bit PAE with 16 Gigs of memory (I know I need to update to 64-bit >> already, will do with Fedora 17)? >> >> I am see terrible r/w to an SSD using 3.3.2. When I boot the same machine >> and SSD back in 3.2.15 all is fine. > > > Double check which IO-scheduler the kernel is choosing. > For SSDs, it is normally "noop", but I noticed "cfq" > being chosen instead for some reason. The default I/O scheduler is the default I/O scheduler. Drivers may override this (some high-end PCIe SSD drivers do this, and I think s390 block drivers do as well), but in general the default is left alone. Cheers, Jeff -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
