On 10/16/23 10:13 PM, Gulam Mohamed wrote: > Hi Bart, > > Thanks for the review. I agree, for low latency devices if they have > single hardware queue, this patch will have significant impact. Can > you please let me know about what kind of low latency devices will > have a single queue (just for my knowledge)? Also I would be grateful > if you have any suggestions to fix this issue? I mentioned this last time, I'll do it again - please follow normal mailing list etiquette. Don't top post, and don't do those unreadable/unquotable "see replies inline". As I told you last time as well, the problem with the approach is exactly as Bart says - it's expensive. Because it's expensive, you limit the fix to single queue devices and then hope that this is fine because of some ill perceived notion that single queue devices must be slow, and hence this isn't a big problem. But this both misses the fact that you could very well have single queue devices that are much faster than the one you used to test with. Those do exist. This doesn't even address the fact that presumably this problem isn't specific to single queue devices at all. You may only care about those, but as a fix, it's lacking as it doesn't apply to devices across the board. -- Jens Axboe
