Re: SSD slowdown with 3.3.X?
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On 12-04-20 10:40 PM, Mark Lord wrote: > On 12-04-19 10:07 PM, Joe Ceklosky wrote: >> Mark, >> >> >> Thanks for the info, but nothing like that shows up: >> >> >> [jceklosk@neptune tmp]$ cat c-3.2.15 >> noop deadline [cfq] >> noop deadline [cfq] >> >> >> [jceklosk@neptune tmp]$ cat c-3.3.2 >> noop deadline [cfq] >> noop deadline [cfq] > > > Well, the stuff you posted (above) shows that cfq is being used > instead of noop. For SSDs, noop is the more natural choice, > and used to be the default in the kernel for a while. > I wonder when that changed? Looking into the block layer now, I see that "cfq" at some point became "SSD aware", which is probably when the default io scheduler for SSDs changed back to cfq from noop. Not 100% sure, but that's how it appears now. I still have my systems set it to noop when an SSD is detected. -- 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