On Fri, Aug 04, 2017 at 05:47:23PM -0700, James Smart wrote: > From: Dick Kennedy <[email protected]> > > Various oops being seen on being in the ISR too long and cpu > lockups, when under heavy load. > > The amount of work being posted off of completion queues kept > the ISR running almost all the time > > Correct the issue by limiting the amount of work per itteration.
Have you considered using the IRQ poll mechanism for this? It deferres the heavy lifing into the Soft-IRQ layer and this could help you a lot here. IIRC I've sent James the "Slides" from my LSF/MM session which have the function protoypes on 'em. See 'lib/irq_poll.c' or the be2iscsi driver for further details. -- Johannes Thumshirn Storage [email protected] +49 911 74053 689 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: Felix Imendörffer, Jane Smithard, Graham Norton HRB 21284 (AG Nürnberg) Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
