On Thu, 2018-03-08 at 18:53 +0800, Ming Lei wrote: > Hi, > > This patchset tries to spread among online CPUs as far as possible, so > that we can avoid to allocate too less irq vectors with online CPUs > mapped. > > For example, in a 8cores system, 4 cpu cores(4~7) are offline/non present, > on a device with 4 queues: > > 1) before this patchset > irq 39, cpu list 0-2 > irq 40, cpu list 3-4,6 > irq 41, cpu list 5 > irq 42, cpu list 7 > > 2) after this patchset > irq 39, cpu list 0,4 > irq 40, cpu list 1,6 > irq 41, cpu list 2,5 > irq 42, cpu list 3,7 > > Without this patchset, only two vectors(39, 40) can be active, but there > can be 4 active irq vectors after applying this patchset. Tested-by: Artem Bityutskiy <artem.bityutskiy@xxxxxxxxx> Link: https://lkml.kernel.org/r/1519311270.2535.53.camel@xxxxxxxxx Ming, this patchset fixes the v4.16-rcX regression that I reported few weeks ago. I applied it and verified that Dell R640 server that I mentioned in the bug report boots up and the disk works. So this is not just an improvement, it also includes a bugfix. Thanks!
