lkml.org 
[lkml]   [2015]   [Nov]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [v4.1.10-rt10][PATCH 0/2] PCI: dra7xx/dwc: fix "WARNING: CPU: 1 PID: 82 at kernel/irq/handle.c:150 handle_irq_event_percpu"
On Tue, 3 Nov 2015, Grygorii Strashko wrote:
> On 11/03/2015 03:46 PM, Sebastian Andrzej Siewior wrote:
> > On 11/02/2015 08:30 PM, Grygorii Strashko wrote:
> >> On -RT above code will generate warnings, because driver_xx_hw_irq_handler()
> >> will be forced threaded (by default) and, as result, generic_handle_irq()
> >> will be called with IRQs enabled. To W/A this issue generic_handle_irq() can
> >> be surrounded by raw_spin_lock_irqsave/irqrestore(wa_lock).
> >
> > and what happens without -RT if you boot threadedirqs?
> >
>
> Yep. It will still warn :( Can be reworked to cover this case also, i think
> (if overall concept will be accepted)

wa_lock - I read that "Warning Annihilation Lock" - does not really
qualify as a concept.

Thanks,

tglx


\
 
 \ /
  Last update: 2015-11-03 21:21    [W:0.047 / U:0.492 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site