Messages in this thread |  | | Subject | Re: [PATCH] block: BFQ default for single queue devices | From | Bart Van Assche <> | Date | Thu, 04 Oct 2018 13:09:06 -0700 |
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On Thu, 2018-10-04 at 20:25 +0100, Alan Cox wrote: > > I agree with Jens that it's best to leave it to the Linux distributors to > > select a default I/O scheduler. > > That assumes such a thing exists. The kernel knows what devices it is > dealing with. The kernel 'default' ought to be 'whatever is usually best > for this device'. A distro cannot just pick a correct single default > because NVME and USB sticks are both normal and rather different in needs.
Which I/O scheduler works best also depends which workload the user will run. BFQ has significant advantages for interactive workloads like video replay with concurrent background I/O but probably slows down kernel builds. That's why I'm not sure whether the kernel should select the default I/O scheduler.
Bart.
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