On Fri, 2016-22-04 at 04:57:48 UTC, Michael Neuling wrote: > Keep IRQ mappings on context teardown. This won't leak IRQs as if we > allocate the mapping again, the generic code will give the same > mapping used last time. > > Doing this works around a race in the generic code. Masking the > interrupt introduces a race which can crash the kernel or result in > IRQ that is never EOIed. The lost of EOI results in all subsequent > mappings to the same HW IRQ never receiving an interrupt. > > We've seen this race with cxl test cases which are doing heavy context > startup and teardown at the same time as heavy interrupt load. > > A fix to the generic code is being investigated also. > > Signed-off-by: Michael Neuling <mi...@neuling.org> > cc: sta...@vger.kernel.org # 3.8 > Tested-by: Andrew Donnellan <andrew.donnel...@au1.ibm.com> > Acked-by: Ian Munsie <imun...@au1.ibm.com> > Tested-by: Vaibhav Jain <vaib...@linux.vnet.ibm.com>
Applied to powerpc fixes, thanks. https://git.kernel.org/powerpc/c/d6776bba44d9752f6cdf640046 cheers _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
